Journal of Environmental Engineering and Waste Management
Deprecated: preg_replace(): Passing null to parameter #3 ($subject) of type array|string is deprecated in /var/www/ojs/cache/t_compile/cb143342b5ba5eb2439af5cbe51b1b7e64a61374^243d02036cce242bb6d3a6629330279cec5a961b_0.plugins-7-plugins-generic-webFeed-generic-webFeed.rss.tpl.php on line 49
Authors who publish with this journal agree to the following terms: Authors retain copyright and grant the journal right of first publication with the work simultaneously licensed under a Creative Commons Attribution License that allows others to share the work with an acknowledgement of the work's authorship and initial publication in this journal. Authors are able to enter into separate, additional contractual arrangements for the non-exclusive distribution of the journal's published version of the work (e.g., post it to an institutional repository or publish it in a book), with an acknowledgement of its initial publication in this journal. Authors are permitted and encouraged to post their work online (e.g., in institutional repositories or on their website) prior to and during the submission process, as it can lead to productive exchanges, as well as earlier and greater citation of published work.
Study of Solid Waste Management at the West Java Province Bappeda Office
The condition of the Landfill of Sarimukti which has exceeded capacity has led to the issuance of West Java Province Regional Secretary Circular Letter No. 11/PBLS.04/DLH/2023 concerning Waste Management in Regencies and Cities and Regional Apparatus of West Java Province. As a follow-up to the publication of this letter, a study regarding solid waste management at the West Java Province Bappeda Office was carried out as an evaluation and improvement effort, as well as being the first step to realizing complete waste management in office environments, especially in related offices. The research stages were carried out through interviews and field sampling which was carried out over 5 working days and was limited to canteen and kitchen activities which were the main sources of organic waste within the Office. Guidelines for procedures used in field sampling refer to SNI 19-3964-1994. Through this research it was found that the waste generation from the Office is currently 254,355 kg/month. A total of 20,693 Kg/Month of valuable inorganic waste has been processed at the Bandung City Main Waste Bank, while 118,605 Kg/Month of organic waste has still not been processed so it goes straight to the landfill. The composition of valuable inorganic waste is dominated by paper waste (28.75%) while organic waste is dominated by non-food waste (72.55%). The recommended efforts for processing organic waste are with three options, namely “Losedaâ€, “Ember Bioporiâ€, and “Drum Komposterâ€. The smallest total budget plan for this project is by using “Ember Bioporiâ€, which is IDR 736,000.00. Meanwhile, the largest total budget plan is by using “Losedaâ€, which is IDR 3,994,000.00.
Life Cycle Assessment (LCA) of Jababeka Water Treatment Plant I
To follow the government regulation on environmental protection, PT. Jababeka Infrastructure follows the PROPER standard, currently blue PROPER, PT. Jababeka Infrastructure wishes to conduct a Life Cycle Assessment (LCA) study for PT. Jababeka Infrastructure to support the planning of upgrading the proper title from blue to green. LHK No. 1/2021) that covers the environmental performance of an industrial activity is the compilation of product Life Cycle Assessment (LCA). This model consists of five main unit processes: raw water intake, coagulation-flocculation, clarifier, filtration, and reservoir unit with water supply system. This assessment was conducted for the functional unit of producing clean water of 8,452,745 tons/year, under gate-to-gate scope
Copyright (c) 2024 Angelika Rani Pratiwi Ngadu
Analisis Pengelolaan, Prediksi, dan Nilai Ekonomi Sampah Elektronik (E-Waste) di Kota Administrasi Jakarta Timur
Abstract. Sampah elektronik merupakan satu dari beberapa jenis sampah yang pertumbuhanya paling cepat di dunia dari sisi kuantitas maupun toksisitas dan meningkat sebesar 3-5 persen per tahun. Dimana peningkatan ini dapat diartikan bahwa pertumbuhan sampah elektronik lebih cepat kurang lebih tiga kali dari timbulan sampah rumah tangga yang normal. Seiring berkembangnya teknologi khususnya perangkat elektronik mendorong masyarakat lebih konsumtif terhadap penggunaan barang elektronik.. Â Objectives: Berdasarkan hal tersebut maka tujuan dari penelitian ini adalah untuk untuk memprediksi jumlah timbulan sampah elektronik rumah tangga, menggambarkan metode pengelolaan yang telah dilakukan masyarakat serta mengestimasi nilai potensi ekonomi daur ulang dari sampah elektronik. Method and results: Lokasi studi berada di wilayah Kota Administrasi Jakarta Timur yang meliputi 10 kecamatan dengan jumlah penduduk sebesar 3.083.883 jiwa. Penelitian ini menggunakan metode purposive sampling berdasarkan metode slovin dengan jumlah responden sebanyak 100 responden Conclusion: Hasil penelitian yang diperoleh yaitu prediksi jumlah timbulan sampah elektronik dalam hal ini laju timbulan sampah sebesar 46,55 kg.KK/tahun. Jumlah timbulan sampah elektronik rumah tangga di Kota Adminsitrasi Jakarta Timur pada tahun 2023 sebesar 49.665.822 kg/tahun dan terus bertambah dalam kurun waktu 10 tahun ke depan sampai dengan tahun 2032 sebesar 55.277.821 kg/tahun. Metode pengelolaan sampah elektronik yang telah dilakukan oleh masyarakat di Kota Adminitsrasi Jakarta Timur adalah 32% dijual, 20% diperbaiki, 19% dibuang, 11% disimpan, 10% diserahkan ke DLH DKI Jakarta, dan 4% dialihfungsikan. Hasil analisis diperoleh estimasi nilai ekonomi sampah elektronik yang dapat didaur ulang yaitu sebesar Rp 306.778.702.990.
Copyright (c) 2024 Khansa Alda Amalia, Yunita Ismail Majud
Evaluation of Waste Shelter Temporary (TPS) in Balikpapan Selatan
Abstract. Balikpapan Selatan is the most populated area in Balikpapan, with amount of population is 150,528 people. Several TPS in Kecamatan Balikpapan Selatan looked poorly maintained, such as messy waste outside the TPS area and the TPS building that had been damaged. This coould be caused by the increasing amount of waste. Objectives: The objectives define the evaluation of TPS in Kecamatan Balikpapan Selatan, The aims was carried out with the analyzing the feasibility of TPS from an operational technical perspective. Method and results: The method used is observation and sampling of waste at 3 TPS locations, namely Damai Baru TPS, Sepinggan 3R TPS, and Gunung Bahagia TPST. The observation was conducted in 8 days according SNI 19-3694-1994. Conclusion: The results showed that the waste generation in each TPS was 0.11 kg/person/day, 0.30 kg/person/day, and 0.39 kg/person/day. The composition of waste at the Gunung Happy TPST is dominated by inorganic plastic bottles, while the highest composition of waste at TPS 3R Sepinggan and TPS Damai Baru is food waste and fruit vegetables. The characteristic test results show that the waste in the three TPS has the potential to be used as compost.
Copyright (c) 2024 Intan Dwi Wahyu Setyo Rini
A Study of Emission Inventory of CO2e in Manufacturing Printing Company (Case Study: PT. XYZ)
As one of Indonesia's printing companies, PT XYZ strives to meet consumer demand by producing as many as they can. They consistently give us large quantities of completed goods each day along with huge emissions and trash. Looking at that situation, it is clear that the industrial process might have an effect on the environment.In light of this, the goal of this study is to determine and estimate the possible effects of emissions from the energy supply on the printing manufacturing process and environmental impact on land based on volatile organic compound materials.The method of measuring the amount of emissions is called emission inventory. ReCiPe 2016 is a method that will use to analyse the impact through manual calculation based on Green House Gases Protocol.Based on the above data it can be concluded that the total emissions produced by PT. XYZ in 2021 and 2022 are 1,616 tons of CO2e and 1,722 tons of CO2e based on electricity purchases paid annually by PT. XYZ. However, calculations from the emission inventory modeling carried out show that the total emissions produced by PT. XYZ in 2021 and 2022 is 1,405 tons of CO2e and 1,389 tons of CO2e.Â
Deprecated: preg_replace(): Passing null to parameter #3 ($subject) of type array|string is deprecated in /var/www/ojs/cache/t_compile/cb143342b5ba5eb2439af5cbe51b1b7e64a61374^243d02036cce242bb6d3a6629330279cec5a961b_0.plugins-7-plugins-generic-webFeed-generic-webFeed.rss.tpl.php on line 150
Copyright (c) 2024 Meigail Endrew Saroba
Analysis OF COD, Ammonia, and pH Reduction of Textile Industry Wastewater with Aeration System Based on Activated Sludge Concentration (Study Case: PT Jababeka Infrastruktur)
Abstract: The batik industry is a sub-sector of the textile and clothing industry that can produce handicraft products, with a continuously growing market. With the increasing demand for batik production, the number of batik craftsmen in Indonesia is also growing, resulting in a significant amount of batik waste generated from its production. Batik wastewater contains high levels of COD, ammonia, and pH, as well as heavy metals, making it hazardous to discharge into rivers without prior treatment. Objectives: The purpose of this research is to determine the effectiveness of the concentration of activated sludge in biological treatment on the efficiency of reducing COD, ammonia, and pH levels in the treatment of batik wastewater at PT Jababeka. Method and results: The experiment was conducted using a batch system in the aeration process, utilizing aerobic bacteria derived from 2 (two) different types of activated sludge. The residence time of bacteria in wastewater biodegradation is 22.5 hours based on the maximum incoming wastewater discharge Conclusion: The concentration and composition of activated sludge used in the biological process, particularly in the aeration process, have an impact on reducing the characteristics of textile wastewater. The mixing of activated sludge types from the batik treatment system and sludge from the centralized process at PT Jababeka has shown better results in reducing the characteristics of textile wastewater. Biological treatment using aerobic bacteria from two different types of activated sludge in Sample 3 shows better efficiency in removing COD by 83.5% and NH3 by 99.45%, along with a pH reduction of 25.6%.
Copyright (c) 2024 Carlos Margono Sianturi
Evaluasi Pengelolaan Limbah Bahan Berbahaya Dan Beracun (B3) Di Industri Farmasi
The capacity production of the PT X as the Pharmaceutical Industry is 435.47 tons/year and produces hazardous waste which needs to be managed to protect the environment and humans. The company is not capable and does not have permission to treat hazardous waste, so PT X cooperates with other corporations that will carry and treat hazardous waste. The purpose of the study was to evaluate the management of hazardous waste in the PT X as Pharmaceutical Industry. The research was conducted by observing and identifying hazardous waste generation, then comparing it with the regulation. In the existing conditions, the PT X as Pharmaceutical Industry manages 6 types of hazardous waste, such as expired products, rejected materials and products, laboratory reagents, used hazardous waste packaging, used lubricating oil, used filters from air pollution treatment plants, and used lamps. There is some hazardous waste potential that has not been facilitated and needs to be added. The total hazardous waste generation is 155 kg/day, so the maximum storage is 90 days. There is some evaluation of the hazardous waste storage including the absence of a storage tank, arrangement, and several other improvements. The area of existing hazardous waste storage is 88 m2 and it still fulfills the needs for hazardous waste storage at the location, so there is no need to expand hazardous waste storage.
Copyright (c) 2024 Talent Nia Pramestyawati, Ro'du Dhuha Afrianisa
DESIGN PROPOSAL PRE-CHLORINATION PROCESS IN WATER TREATMENT (STUDY CASE: WTP 2 PT. JABABEKA INFRASTRUKTUR, CIKARANG)
PT Jababeka Infrastruktur's Water Treatment Plant (WTP) 2 is a water treatment facility that aims to serve clean water needs. This company uses an open system where chlorine is injected directly into the raw water intake, this allows for waste of chlorine which is wasted due to evaporation. The current injected dose in pre-chlorination is 7 - 7.5 mg/L with a residual chlor of 0.7 mg/L. The residual chlor, according to WHO, is still outside the standard criteria, where the standard set is in the 0.2 - 0.5 mg/l range. The dose injected in pre-chlorination should be more optimal because, in the secondary data of the WTP 2 laboratory test report, the content of nitrate, nitrite, ammonia, and total iron parameters is low. This study aims to determine the chlorination breakpoint graph pattern formed, determine the chlorine dose breakpoint in the water treatment process, and recommend the optimum dose of pre-chlorination and pre-chlorination system with a closed basin. This study used laboratory analysis on raw water samples. Then, the water samples were given chlorine treatment with a dose range of 0 – 15 mg/L. After being treated, the samples were analyzed for pH, turbidity, ammonia, nitrate, nitrite, and total iron. The chlorination breakpoint graph is linear, as evidenced by the low reducing agent. The breakpoint was achieved at 0.9 mg/L of chlorination dose for raw water turbidity 30.5 NTU. The recommended optimum dose in the breakpoint dose range of 1.1 mg/L. The pre-chlorination unit is a two-line chlorination unit with a closed design with a mixer inside.
Study of Household Willingness to Pay Waste Retribution Fees at Kapuk Village, Cengkareng, West Jakarta
Abstract. Kapuk Village faces significant challenges in effective waste management. High population numbers and the lack of waste facilities have resulted in high waste generation and diverse waste compositions. In an effort to overcome this problem, community participation in the form of WTP is very important. WTP in Kapuk Village reflects the extent to which the community is willing to pay to improve waste management services. Objectives: Estimate the WTP value, analyze the factors that influence it, and determine the total generation and composition of the waste produced. Method and Results: Using a quantitative approach supported by primary data obtained from the results of questionnaires, as well as observations and measurements of waste generation and composition. Conclusion: Waste generation in Kapuk Village was 0.38 kg/person/day and 2.44 L/person/day, consisting of 61% food waste, 9% wrappers of food/drinks, snacks, instant and noodles, 3% plastic bags, 2% bottles of mineral water and soda, 1% Styrofoam, 3% cardboard/cartons, 1% tissue, 7% HVS, books, newspapers, and magazines, 2% cloth, and 11% diapers. According to the t-test results, the factors partially associated with WTP are perception (sig. value = 0.000), attitude (sig. value = 0.001), and knowledge (sig. value = 0.000). These three variables also simultaneously influence the value of WTP, with a sig. value of 0.000. In addition, the WTP for waste retribution fees in Kapuk Village is Rp 20,633/month/family. The budget from the WTP can be used to hold seminars or campaigns, as well as provide additional facilities for waste management.
Pengaruh Resirkulasi dan Aerasi Terhadap Penurunan Konsentrasi BOD dan COD dari Air Limbah Grey Water dengan Media Honeycom
Abstract. Domestic wastewater contributes as a major polluter in rivers in Indonesia, of which 53.28% has been heavily polluted. The existence of river pollution will disrupt the health, environment, social and economy of the community. Domestic wastewater treatment systems are generally subjected to aeration and recirculation processes, either separately or simultaneously. Objectives: The purpose of this research was to study the effect of recirculation and aeration on reducing BOD and COD concentrations in domestic wastewater. Method and results: This research was conducted experimentally by treating domestic wastewater using an aerobic biofilter system with honeycomb plastic media. In this research, 4 reactors were used, namely the recirculation and aeration system in reactor A, aeration system in reactor B, recirculation system in reactor C, and without using recirculation and aeration systems in reactor D. The conditioning and growth of microorganisms in the reactor were carried out for 14 days until the biofilm is formed. The BOD and COD concentration tests were carried out every 6 hours for 24 hours. Conclusion: The results showed that after 24 hours, reactor A could reduce the concentration of BOD by 93.65% and COD by 94.68%, in reactor B by 94.84% and 91.13%, in reactor C by 89.29% and 91.13%, while in reactor D only 78.17 % and 86.57%. The optimum conditions occurred in reactor B which got the best results in reducing the BOD concentration up to 93.7% and COD to 93.5% at residence time of only 12 hours
Copyright (c) 2024 Aryo Sasmita, Jecky Asmura, Febri Maharani
STUDI PEMANFAATAN FLY ASH PEMBANGKIT LISTRIK TENAGA UAP (PLTU) BATUBARA MENJADI BATAKO
Abstract. Coal-Fired Power Plant (CFPP) owned by PT. XYZ is located in Babelan , Bekasi Regency. Coal for CFPP is expected to continue to increase every year, so that the amount of fly ash produced will also increase. Fly ash are sources that have the potential to have a negative impact on the surrounding environment. Utilization or processing of fly ash can have a positive impact, including being used as a supplement in the production of concrete, both for mortar and mortar mixes. Objectives: The Objective of this research is how the composition of fly ash influences in the manufacture of bricks on the dimensions of, compressive strength and water absorption and whether they meet the quality requirements of bricks based on SNI 03-0439-1989. Methods and Results: The method applied in this study was make 5 different treatments of bricks with different compositions, making bricks using a manual brick molding tool for hollow bricks, then from the results of the molded bricks made and then dried until 28 days old and continued with dimension measurements, compressive strength, and water absorption capacity The findings indicated that the dimensions of the fly ash bricks remained within.the acceptable tolerance limit. Among the fly ash bricks tested, one exhibited the.highest compressive strength at 80.48 Kg/Cm2, coupled with the highest water absorption capacity recorded at 7.43%. Conclusion: It is recommended that during the mixing process, great care should be taken to ensure the mixture achieves homogeneity, ensuring thorough and even mixing It is advisable to employ a hydraulic machine to facilitate this process, leading to denser brick molding outcomes.
Copyright (c) 2024 Taufiqurrahman Hafiizh
A study of centrifugation technology for reducing microbial contamination in surface water sample
Abstract.Cikarang is the largest industrial city in Southeast Asia, making it particularly susceptible to pollution and a decline in the quality of river water. Wastewater from industry, medical waste, and other sources is discharged into the Cilemhabang River, which is black and smells rotten. Monitoring and analyzing data on water quality can help determine the extent of industrial activity-related pollution and the capacity of river water flow to mitigate pollution. The environment, particularly river water resources, can be preserved by further evaluation actions. Objectives:To test for biological parameter in water after centrifugation treatment, the TPC method is used. Centrifugation is a separator that utilizes the difference between the effects of centrifugal force on each molecule of a substance. The examination seeks to reveal the quantity of microorganisms that proliferate and cluster into colonies. Method and results: This study is a laboratory scale research using a centrifuge as the main tool. River water was treated at 6000 rpm and centrifuged 1 minute duration without the addition of Kaolin. Conclusion: The result is in removal efficiency in the range of 81% - 83% for the turbidity parameter and 18% - 28% for the Total Plate Cont of microbial removal. Based on statistical tests using paired T-test, it has a large effect for reducing microbe although it still shows below the quality standard
Copyright (c) 2024 Jihan Callistasya Purnomo
Prediksi Daerah Potensi Bencana Kebakaran Hutan Akibat Perubahan Penggunaan Lahan di Kabupaten Paser, Kalimantan Timur
Abstract. Forest fires in East Kalimantan in 2019 reached 6,715 hectares. In Paser Regency with an area of 11,603.94 km², the threat of forest and land fires is a sure thing. The fire footprint that occurs is always high every year, this is associated with changes in land cover and rainfall that changes from year to year from 2009 to 2019 and will continue to change until 2035. Objectives: This research aims to predict potential areas of forest and land fires due to land use changes from 2009 to 2035. This step is expected to provide recommendations for mitigating and adapting to forest and land fires that can be implemented in Paser Regency. Method and results: In predicting forest and land fires in 2035, data are needed that includes maps of Earth's appearance, hotspot data, land use maps in 2009 and 2019, Landsat 8 satellite imagery in 2014, maps of soil types, existing rainfall data, and rainfall data predicted by Representative Concentration Pathway (RCP) 8.5. The tools used in this research are ArcGIS software and Ms. Offices. The results of data processing show that fire hazard predictions in 2035 have a higher and more widespread level of vulnerability. In the low vulnerability area in 2019, which was initially 452,926.69 hectares, it decreased to 411,666.52 hectares in 2035. Conclusion: The map with moderate vulnerability level in 2019 which was originally 164,666.32 hectares increased to 165,695.33 hectares and the map of the area with a moderate level of vulnerability in 2019 increased to 165,695.33 hectares. high vulnerability in 2019 which was initially 426,045.30 hectares rose to 466,383.07 hectares.
Copyright (c) 2024 Maulana Dwi Putra Riyadi, Salis Deris Artikanur, Salim Suliman
Phytoremediation Study on Reducing pH, Ammonia, and Turbidity Level with Betel Ivory (Epipremnum Aureum) (Study Case Contaminated Lake Water in Residential X Cibitung)
About 80% of the water used by humans for their activities will be thrown back in the form of wastewater from industrial and domestic. The source of waste in the lake at Residential X in Cibitung is residential activities. This study aimed to determine the ability of Betel Ivory (Epipremnum aureum) to reduce pH, turbidity, and ammonia in lake water that was contaminated by domestic wastewater and to determine whether the phytoremediation carried out using Betel Ivory (Epipremnum aureum) can be applied in Residential X Cibitung. The experiment was carried out using a batch system for phytoremediation, with a volume of Betel Ivory (Epipremnum aureum) of 13% w/w and a waste retention time of 7 days. Parameter reduction results were obtained using Betel Ivory (Epipremnum aureum), where the sample experienced a higher reduction rate in decreasing the concentration of pH, turbidity, and ammonia parameters when compared to the control. The phytoremediation using Betel Ivory (Epipremnum aureum) significantly impacted the pH, turbidity, and ammonia parameters according to analysis using one-way Anova Single Factor, and the findings of the study using the T-test of equal variance met the quality standard but did not comply. The potential for phytoremediation by using Betel Ivory cannot be realized because the depth of the lake reaches 7 meters and has a large number of plants.
Analisis Peran Stakeholder dalam pengembangan Kepulauan Widi
The Widi Islands have a potential marine ecotourism area of 88.57%, such as pristine, natural and exotic natural beauty, as well as marine biota with high diversity. However, with all that, threats to resources and unfair use of all elements (privatization of the area) in the Widi Islands are still high. One of the threats that has been in the public spotlight so far is the island selling case. Therefore it is very important to identify the roles and authorities of stakeholders for the sustainable development of the Widi Islands. This study uses an empirical paradigm using primary data obtained through FGDs and interviews as well as secondary data from documentation studies which are then analyzed using mactor. The results of the study show that the key actors who have high influence and low dependency are the Ministry of Maritime Affairs and Fisheries (KKP), Non-Governmental Organizations (NGOs), and the private sector. Then actors who have a high level of influence and dependency are the Director General of Marine Spatial Management (DJPRL), Regional Marine Protected Areas Center (BKKPD), Regional Government (PEMDA). Meanwhile, actors with a high level of dependency and little influence are the Maritime Affairs and Fisheries Service (DKP), the Tourism Office (DISPAR), community supervisory groups (POKMASWAS), and fishermen.
Green House Gas Emission Inventory and Energy Use Of TPS3R Flamboyan Using Waste Reduction Model (WARM) V.15
Abstract. Emissions are the result of human activities that increase the concentration of greenhouse gas gases such as CCl2F2, CO2, N2O, and CH₄, Increasing the attention of the gases above will increase the greenhouse effect which ultimately increases the earth's temperature. The existence of a waste management site can produce greenhouse gas emissions from vehicle transportation, composting processes, TPA to recycling. One of the roles of Flamboyan's TPS3R is to reduce the amount of plastic waste by recycling and composting and the residue will go to Cipeucang TPA for landfilling. This is an effort to reduce the amount of organic and non-organic waste, but the recycling, and composting. Landfilling processes can produce CO2 in the waste processing and distribution process, so it is necessary to calculate the amount of CO2 from the baseline management of municipal solid waste that will be compared with alternative municipal solid waste scenarios to see the conclusion of the analysis using the Waste Reduction Model (WARM) application. Objectives: The objective of this journal is to calculate the greenhouse gas emission and energy use of TPS3R Flamboyan. Method: The secondary data was obtained from TPS3R Flamboyan’s management. The writer use description analysis. Result: 1. Â Â Â the inventory calculation result of GHG emission current condition and alternative condition are -5,24 and -6,5. 2. Â Total energy use in the current condition is -58,79 and the alternative condition with HDPE recycling is -92,68 Conclusion: 1. the inventory calculation result of GHG emission current condition and alternative condition are -5,24 and -6,5. 2. Total energy Use in the current condition is -58,79 and the alternative condition with HDPE recycling is -92,68.
Copyright (c) 2023 Asrining Ghina Maulidia, Filson Maratur Sidjabat, Temmy Wikaningrum
ANALISIS HUBUNGAN TINGKAT KEBISINGAN TERHADAP KELELAHAN KERJA PADA PEKERJA ENGINEERING WORKSHOP DI PT X, JAWA BARAT
Abstract: Fabrication activities in the factory area have the potential to cause noise. Noise can cause feelings of discomfort, which can lead to difficulties in direct communication, cause cognitive decline, and contribute to job burnout. This study focuses on assessing the noise level caused by activities at the Engineering Workshop PT X, workers' perceptions of work fatigue, and the effect of noise levels on worker fatigue. Objective: This study aims to analyze the noise level, to analyze work fatigue, and to determine the relation of noise level on work fatigue. Method and results: The method used is the measurement of daytime noise levels at the specified point and time and questionnaire data collection. The results of measuring the noise level at the Engineering Workshop PT X, it is known that the lathe area shows a value of 74.1-77.0 dB, the refurbish area shows a value of 84.2-86.9 dB, and the grinding machine area shows a value of 71.5-79.7 dB. Questionnaire data on the level of work fatigue, showed that 25 respondents or 80.6% experienced mild fatigue and 6 respondents or 19.4% experienced moderate fatigue. Chi-Square statistical test showed the value of p = 0.37 (α < 0.05). Conclusion: Only refurbish area that produce noise level above standard. From questionnaire, most of respondents experienced mild fatigue. By using Chi-square analysis, it can be stated that there is no relationship between noise level and work fatigue on workers at Engineering Workshop PT X.
Evaluation of Solid Waste Management Techincal Aspect In Taman Sari District, West Jakarta
The solid management system in Taman Sari district, West Jakarta still uses collect-transport-dispose system. The population of Taman Sari District is 130,110 people with a total waste generation of 399,96 m3/day. This study aims to evaluate the operational technical aspects of the waste management system in Taman Sari district, which includes solid containerization, collection, and transportation of waste to final disposal at TPST Bantargebang. This research was conducted using primary data collection methods and secondary data obtained by conducting interviews, questionnaires, and field observations. The sampling method used is the Stratified Random Sample technique using the variable income level of the community at the sampling location, low income, middle income, and high income. The Taman Sari district sampling location selected 3 (three) locations namely Pinangsia Village, Krukut Village, and Keagungan Village which resulted in 45 samples for domestic waste and 26 samples for non-domestic waste. The observation results show that the aspect of waste disposal in low-income settlements is inadequate, while the aspect of disposal in middle-income and high-income settlements and commercial areas already has adequate disposal. The solid collection aspect of Taman Sari district consists of direct individual, indirect individual, and direct communal patterns. However, the solid transportation pattern in low – high income settlements only has 1-2 rounds which results in TPS overload. Therefore, the solid management system implemented in Taman Sari district needs to be evaluated to determine suitable alternatives for improving the existing conditions of the operational technical aspects of waste management in Taman Sari district.
Copyright (c) 2023 Pramiati Purwaningrum
USED LUBRICANT OIL PURIFICATION WITH ACID AND CLAY METHOD
The power generation industry from every production process certainly produces non-toxic and hazardous waste and toxic and hazardous waste. One of the toxic and hazardous waste of used lubricating oil. This scientific work aims to analyze the characteristics of used lubricating oil to be used as raw material for purification and to determine the most optimal quality of the purified lubricating oil from the addition of acid and bentonite clay. The research method starts from a preliminary test by knowing the characteristics of used lubricating oil, followed by activation bentonite clay with hydrochloric acid, preparation of used lubricating oil with hydrochloric acid, adsorption process with the addition of hydrochloric acid and bentonite clay as adsorbent and the mass variation is 10 gr, 15 gr, and 20 gr with the temperature variation is 85°C, 95°C, and 105°C in order to obtain 9 variations. After the purification process is carried out, the characteristics of the lubricating oil are obtained with optimum conditions of 9 variations, namely 20 gr bentonite clay and the temperature is 105°C (B20T105) so the conclusion are obtained based on the results of the purification analysis, namely the parameters of water content, specific gravity, and total acid number still meet the standards for the use of lubricating oil. As for the kinematic viscosity, it still does not meet the standards for the use of lubricating oil.
Analisis Daya Dukung untuk Mendukung Swasembada Pangan di Provinsi Kalimantan Utara
Abstract. Population growth, regional development, and inaccuracy in planning targets will impact and disrupt food self-sufficiency Objectives: Analyzing and evaluating Carrying Capacity (CC), Assessing and analyzing land requirements in North Kalimantan Province Method and results: The research method is qualitative, which is analyzed descriptively quantitative. The formula of CC developed from a combined concept of the theory of Odum, Cristeiler, E Howard, and Issard. The results showed that the food carrying capacity of North Kalimantan Province in 2020 was 0.56 and land requirements for paddy 26.912 ha. Food carrying capacity is projected to decline to 0.28, and land requirements for paddy will increase to 38.479 ha in 2037. Conclusion: North Kalimantan Province's Food carrying capacity was incapable of food self-sufficiency (Class III) and continues to decline from 2016-2020 until projected in 2037. Added paddy-harvested area or land in 2037 is needed to realize food self-sufficiency through an alternative policy of expanding paddy fields (extensification) by maintaining productivity stability or increasing productivity (intensification).
Reduksi Tingkat Kekeruhan dan Total Partikel Tersuspensi Melalui Proses Sentrifugasi Pada Air Limbah Wudu
Abstrak. Air limbah dihasilkan dari aktivitas manusia, baik industri maupun domestik. Air limbah domestik berasal dari kegiatan rumah tangga seperti mandi, mencuci, jamban, dan wudhu. Indonesia sebagai negara dengan mayoritas penduduk muslim menghasilkan air limbah wudhu yang dihasilkan setidaknya dari lima kali ibadah solat wajib. Secara umum, air limbah dapat diolah dengan berbagai teknologi, salah satunya adalah teknologi sentrifugasi. Teknologi sentrifugasi adalah salah satu teknologi proses untuk memisahkan partikel tersuspensi dari air limbah. Tujuan: Penelitian ini berfokus pada penggunaan teknologi sentrifugasi untuk mengolah air limbah wudhu yang bertujuan untuk mengetahui kemampuan teknologi sentrifugasi dalam pengolahan air limbah wudhu dalam hal efisiensi penyisihan dan penetuan kondisi proses optimum sehingga dapat menghasilkan efluen sesuai baku mutu air permukaan. Parameter indikator yang diamati sebagai acuan untuk mengamati perubahan kondisi efluen hasil pengolahan adalah tingkat kekeruhan (turbidity) dan konsentrasi total padatan terlarut (TSS). Metode dan Hasil: Penelitian ini merupakan penelitian skala laboratorium yang menggunakan unit sentrifugasi sebagai instrumentasi utama. Air limbah wudhu akan diolah pada berbagai variasi kombinasi perlakuan antara lain variasi kecepatan rotasi 500, 1500, 3000, 4500, dan 6000 rpm dan variasi durasi sentrifugasi 1, 3, 5, 8, dan 10 menit dengan penambahan kaolin pada dosis 25, 50, dan 75%. Kesimpulan: Hasil pecobaan menunjukan bahwa rentang penyisihan kekeruhan berada pada nilai 16,1-99,4% dan 0,9-92% untuk penyisihan parameter TSS. Kondisi optimum proses penyisihan dapat dicapai pada kombinasi perlakuan durasi 1 menit, kecepatan sentrifugasi 6000 rpm dan dosis kaolin 75%.
Copyright (c) 2023 Rijal Hakiki, M.T., Dwi Anggi Agustin
Priorities in The Phasing Design of Rangkasbitung Sub-District Sewerage System
Rangkasbitung Sub-district (105 25’ – 106 30’ EL and 6 18’ – 7 00’ SL) is the capital city of Lebak Regency which has an area of 7,252 Ha. Based on the Master Plan of Lebak Regency 2014 – 2034, It will be built the toll roads and industrial areas in Nameng Village, Citeras Village, and Mekarsari Village. Therefore the Rangkasbitung will become a rapidly growing urban area. The sanitation services are still 60,63%. To achieve the Goal 6 of SDGs, then this paper aims to design an analytical technique the sewerage system in order to achieve sanitation for all, and to recommend the planning phases in order to be effective and efficient sewerage system until the end of the 2040. The Sewerage system design has anticipated the Ciujung River and Ciberang River with seven (7) tributaries that pass through this sub-district. The location of the Waste Water Treatment Plant (WWTP) is designed at a low elevation, namely in Kolelet Wetan, Nameng, and Mekarsari Village by considering the flood-free areas and topography. The recommendations for the construction phases are based on population density and the service area of the WWTP location. The total wastewater discharge is designed as 510.367 L/sec, which will be implemented into two phases. The first phase will build WWTP A = 208.937 L/sec and WWTP B = 275.188 L/sec, then WWTP C = 26.242 L/sec in the second phase. The design of the trunk sewer has a total 24,556 m length, of which 19,043 m will be in the first phase and 5,513 m will be in the second phase. The diameter of the trunk sewer ranges from 300 mm to 1,000 mm. The first phase indicated depth by diameter (d/D) ratio in the range of 55% - 78%, and the velocity range of 0.68 – 2.24 m/sec. The final phase indicated 61% - 75% and the velocity range of 0.69 – 2.24 m/sec.
Copyright (c) 2023 Lani Oktaviani, Ramadhani Yanidar, Lailatus Siami
The Study Of Rainwater Harvesting System For Supporting Green Campus
Water is one of the most important elements for humans but nowadays, the growing demand for clean water and increasing water scarcity are serious issues that must be addressed. As an alternative solution, optimizing the use of high-intensity rain in Indonesia through a Rainwater Harvesting system can help and support the water conservation efforts conducted in the green campus concept. The purpose of this final project is to calculate the cost and saving possibility through applying the rainwater harvesting system both in terms of water saving possibility and economic saving and provide the design of a rainwater harvesting system unit that is suitable for the Building A of President University. The observation method was used in this final project to find out what is the water quality of the rainwater harvested and also used the documentation method for processing the secondary data. Using the given rainfall data, the rainwater supply, in year water saving through the use of rainwater harvesting system can reach around 148.8 – 154 m3/year and save around Rp. 208,320 over the year for water costs. The storage tank capacity of the system was the size of 840 liters with the gutter 9 inches in diameter and the distribution pipe diameter 8 inches.
The Study of Eco Enzymes Application For Decoloring Textile Industry Wastewater Following by pH Value Analysis
Abstract. There is a good potential between the increase in the growth of the textile industry, especially on a small scale which also causes a lot of environmental pollution of colored water in the water bodies of the area around the textile industry With the great potential of using Eco Enzyme which can be used as a biocatalyst. Eco Enzyme contains several types of enzymes, which can be used as tools to speed up the textile wastewater decoloring process which is included in the Biological method in textile wastewater treatment. Objective. To find out what are the results of color removal efficiency after adding by Eco Enzymes, and its effect on the pH values. Methods and Results. In this research, by using 10% concentration from Orange and Dragon Fruit Peels. The sample that was added by Orange Eco Enzymes (OEE) and Dragon Fruit Eco Enzymes (DEE) has a color removal respectively in 80% and 82% in 48h then continuously slowly degrades slowly to 86% and 86% in 120h. Before adding the Eco Enzyme, the sample has a high pH of 10.98. After added by OEE and DEE, in 48h respectively the pH values decrease to 9.58 and 8.98, then continuously slowly degrades to 8.70 and 8.56 in 120h. Conclusion. The results show that selected Eco Enzymes are able to decolor textile wastewater also following by reducing pH and already stable starts from 48h.Â
Copyright (c) 2023 Annisa Rahma Anindita, Temmy Wikaningrum