E-commerce activities have shown significant growth, especially during the Coronavirus Disease (Covid-19) pandemic, driving an increase in packaging waste generated by consumers from their online purchases. Similar to other cities, Yogyakarta City has waste management facilities at source, but the existence of this infrastructure has not significant reduced the amount of waste transported to the Piyungan landfill. This study aimed to predict consumer behavior and measure their willingness to participate in packaging waste management through the Theory of Planned Behaviour (TPB) model. Data was collected through structured questionnaires distributed to 111 respondents in 14 subdistricts in Yogyakarta city which were then analyzed using Partial Least Square-Structural Equation Modeling (PLS-SEM). The results showed that knowledge, perceived behavioral control, and convenience had a significant effect, while subjective norms and attitudes had a insignificant effect on the willingness of consumers participation in packaging waste management.

Apart from households, large amounts of waste are also generated from commercial areas, including restaurants. One of the trending restaurant innovations nowadays in Indonesia is all-you-can-eat (AYCE) restaurants. The study aims to determine waste generation, composition, and characteristics of waste from AYCE restaurants in Bandung, consumer behaviour and subsequently propose better waste management. Primary data was collected from six AYCE restaurants through waste generation sampling for 8 consecutive days, analyzing samples at laboratory, distributing questionnaires, and interviews. The results show that waste generation at AYCE restaurants in Bandung City reached 0.74 kg/consumer/day, with the largest proportion being food waste (55.74

The adverse environmental impact of fossil fuel use, including greenhouse gas emissions (CO₂) driving global warming and climate change, is well-documented. Furthermore, fossil fuel supply chains are highly vulnerable to disruptions, often exacerbated by geopolitical tensions, resulting in global energy crises. Reducing reliance on unsustainable resources through an energy transition and ensuring supply stability to support energy access aligns with Sustainable Development Goal 7 (SDG 7). This study aims to analyze energy system vulnerabilities by examining supply-demand gaps in Indonesia’s fuel sector, and assess energy sustainability using the United Nations Economic Commission for Europe (UNECE) framework, focusing on energy security and fossil fuel import dependence as key indicators. Results reveal a positive trend in Indonesia’s fuel supply chain over the past decade, with a Compound Annual Growth Rate (CAGR) of 2.6% in fuel production, 0.7% in consumption, and a 1.6% annual decrease in imports. However, average values over the last 10 years indicate a significant supply-demand gap: annual fuel demand averages 69,069 kL, while production averages 47,344 kL, meeting only 68.58% of demand. This leaves a shortfall of 21,724 kL (31.42%), which is offset by imports averaging 26,805.50 kL. These findings highlight vulnerabilities that threaten energy security and underscore the unsustainability of the current energy system. They establish a foundation for future studies on energy sustainability through fuel supply-demand projections in Indonesia, exploring scenarios to address these challenges.

Municipal solid waste treatment using a thermal method such as incinerator offers several advantages, including small land requirements, large volume reduction and electricity generation. On the other hand, the waste management hierarchy recommends waste recycling to generate revenue and reduce the burden of air pollution in incinerator. The study aims to evaluate the operation of incinerator facilities in Jakarta, especially regarding electricity generation and waste recycling potential. Sampling procedures for 8 consecutive days followed by laboratory tests were carried out to determine the amount, composition and characteristics of waste as feedstock to the incinerator. Based on data from operators, the average amount of waste treated using the incinerator from January to May 2023 was 23.02 tons/day; quite very low from the 100 tons/day design capacity. The average waste composition was dominated by organic wastes, non-PET plastics, papers, and PET plastic at 54.82%, 18.22%, 6.72%, and 3.71% respectively. The average values of water, ash, volatile matter and fixed carbon contents were 48.70%, 15.13%, 33.40% and 2.77%, respectively. The average calorific value of the waste mixture entering the first waste-to-energy facility in Indonesia was 5,627 kJ/kg (HHV) equivalent to 5,319 kJ/kg (LHV), so that in the above 5 months, theoretically the amount of electricity produced was 2,487 MWh or the equivalent of 280 kWh per ton of waste incinerated. Compared with existing electricity production data of 110.59 kWh per ton of waste, the percentage of energy recovery was only 40%. Energy losses were caused by the low efficiency of equipments including incinerator, generator set engines and the electricity distribution system. Assuming a recovery rate of 40% for PET plastic and a market price of IDR 1,300 per kg, the total income that could be expected from selling of PET plastic was IDR 13,323,537 per month. Though the electricity generation from the incinerator facility was not so high, waste treatment with adequate technologies must still be carried out by prioritizing the waste recycling to support the achievement of SDGs Numbers 6, 7 and 11.

Currently, laptop becomes an electronic product that is widely used by the public. Similar with other electronic products, a laptop potentially becomes a used product or waste if it no longer has the desired technical specifications and/or have passed their service life. The management of used laptop in Indonesia is currently not carried out institutionally and relies more on the informal sector, including unofficial shops or service points for further handling. This paper aims to determine the potential of implementing the concept of Extended Producer Responsibility (EPR) for the management of used laptops preffered by consumers and used laptop shops in the city of Bandung. Questionnaires were obtained from respondents consisting of 80 households and 83 used laptop shops and/or service points. There were 3 types of treatment that are dominantly carried out by respondents of consumers to their used laptops, namely : just keep them at home (46%), give them to other people (27%) and sell them to traders/service points (18%). Although 60% of the respondents did not know about EPR, it found that 81% of them were willing to pay more when buying a new laptop for handling used laptops and 90% were willing to follow the take back scheme as an alternative to implementing the EPR concept. Similar results were also obtained from respondents of used laptop shops/service places. 83% of the respondents did not know about EPR, 86% of them were willing to participate if the EPR concept was implemented, including through a willingness to pay a higher price for laptops to distributors (65%) and were willing to paticipate a take back scheme (82%). Although the results above show positive prospects for the EPR concept to be implemented, other stakeholders should be involved while proposing the most suitable scheme of the EPR concept.

Final disposal Bantargebang is the largest final disposal in Indonesia which is located in the city of Bekasi with the DKI Jakarta service area. DKI Jakarta’s waste generation in September 2022 is 5948,98 tons/day to 8773,76 tons/day, due to limited land issues and DKI Jakarta’s high waste generation every day. DKI Jakarta needs waste management and determination of the right technology. Mapping waste generation aims to display visual data on waste distribution, to facilitate the determination of DKI Jakarta waste management policies both from sources and at final disposal. Clustering uses the K-mean method using 40,514 data sets of waste generation. The real data on waste generation was obtained from recording directly at the final disposal Bantargebang weighbridge facility with waste sources from DKI Jakarta (West Jakarta, East Jakarta, Central Jakarta, South Jakarta and North Jakarta) for 30 working days with operating hours 24 hours/day. An average waste generation was obtained of 7,512 tonnes/day with a total of 1301 trucks/day. The number of clusters obtained was 3 with 43 members, where cluster 0 had 20 members, cluster 1 had 14 members and cluster 2 had 9 members and the distance performance value showed 0.399.

A sustainable energy source, one that doesn’t compete with food production, is crucial for enhancing national energy independence. This study assesses the feasibility of Nipa palm (Nypa fruticans) as a biofuel source in Indonesia. The research involved vegetation and laboratory analyses to determine Nipa palm’s potential for biofuel production. The results revealed a Nipa density of 3,167 trees ha-1 with a mesocarp yield of 3.99 tons ha-1 and sap yield of 177.35 kL ha-1. The mesocarp contains 39.37% carbohydrates, and the sap has a total sugar content of 13.13%. National estimates for mesocarp and sap production were 3,339,630 tons year-1 and 148,443 thousand kL year-1, respectively. Estimated bioethanol production from Nipa sap was 13,330 thousand kL year-1. Incorporating Nipa bioethanol into the national fuel supply would increase it to 66,766 thousand kL year-1 (24.95%), while reducing imports to 14,531 thousand kL year-1 (47.86%). In conclusion, Nipa palm offers significant advantages as a potential biofuel feedstock, particularly for bioethanol production, without compromising food supplies.

Energi, terutama dalam bentuk listrik merupakan salah satu kebutuhan esensial bagi manusia. Untuk memproduksi listrik dibutuhkan berbagai macam proses, termasuk melalui kombinasi pembangkitan tenaga gas dan uap. Dalam proses produksi, suatu Pembangkit Listik Tenaga Gas dan Uap (PLTGU) menghasilkan berbagai macam jenis limbah, diantaranya yang terkategori sebagai limbah Bahan Berbahaya dan Beracun (B3). Studi ini bertujuan untuk mengidentifikasi sumber timbulan dan mengevaluasi pengelolaan limbah B3 di suatu PLTGU di Kota Palembang, Sumatera Selatan. Metode yang digunakan berupa observasi detail dan analisis kepatuhan pengelolaan limbah B3 berdasarkan peraturan perundangan yang berlaku. Selama masa observasi, limbah B3 yang dihasilkan berupa minyak pelumas bekas atau oli bekas, sludge oil, kain majun bekas, kemasan bekas B3, filter bekas dari fasilitas pengendalian pencemaran udara, limbah terkontaminasi, sludge IPAL, dan limbah kimia hasil analisis laboratorium. Secara umum, PLTGU tersebut telah melakukan pengelolaan limbah B3 dengan memadai, terutama di tahapan pelabelan, pengemasan, dan penyimpanan. Pengangkutan dan pengolahan limbah B3 dikerjasamakan dengan pihak ketiga yang telah memiliki izin terkait. Pengelolaan limbah B3 di suatu industri menjadi penting agar tidak menimbulkan dampak negatif ke lingkungan dan kesehatan manusia.

Rice husk is one of the highest generated agricultural waste estimated to be 11.1-13.8 million tons in Indonesia in 2021. This quantity makes rice husk a potential biomass for conversion into energy to minimize the negative impacts of current processing methods, such as open-burning and mulching. Torrefaction was conducted at 300°C for 30 minutes in this study to enhance the characteristics of biomass fuel by producing biochar with improved combustion properties. The biochar produced from torrefaction of rice husk has a calorific value of 15.04 MJ/kg with a volatile matter content of 42.94% and fixed carbon content of 17.94%. Despite this improvement compared to raw rice husk, this biochar tends to have a relatively high mass loss, with a mass yield of only 54%. Therefore, the addition of LDPE plastic feedstock in the form of bubble wrap was carried out up to 50% of the feedstock mass, resulting in further optimization at the RH50 variation, which increased the calorific value to 19.98 MJ/kg and mass yield to 72%. These changes were statistically tested and found to be significant, indicating that torrefaction is a promising technology for rice husk processing, and bubble wrap in this study can significantly contribute to enhancing the characteristics of rice husk as a renewable fuel source.

Major problems at final waste processing sites (TPAs) include leachate, groundwater pollution, public health, and social aspects. Landfills are a major contributor to environmental damage in the world with effects on warming, acidification, smog formation, eutrophication, ecotoxicity and cancer to human health and non-cancer categories. Waste management in D.K.I Jakarta Province is currently facing a shortage of Integrated Waste Management Site (TPST) space with waste production reaching 7,000 to 7,500 tons/day. The main challenge in today’s municipal solid waste management is the selection of the most appropriate waste processing scenario, where the chosen method must be efficient and effective in minimizing leaching and emissions and reducing landfill waste, so that the service life of final disposal will be longer. Final disposal Bantargebang is the largest final disposal in Indonesia with an area of 132,5 Ha, where 80% is used for waste management and 20% of the land is used for support facilities. Final disposal Bantargebang implements various technologies in waste management including landfill, PLTSA, composting, and refuse-derived fuel (RDF) and involves scavengers in waste management at final disposal Bantargebang. The most dominant type of waste is food waste which reaches 39%. Various current technologies are still not effective, the implementation of sanitary landfills in final disposal Bantargebang is still very difficult to meet the planned design criteria, and tends to implement open dumping. This increases the potential for groundwater and surface water pollution and contributes to increased GHGs. Surface water in final disposal Bantargebang is highly polluted with COD and BOD parameters that exceed quality standards. Therefore, the multi-technology applied at final disposal Bantargebang only achieves an efficiency of 8% of incoming waste and the rest is still landfill waste in the landfill zone which is 92%.

Leachate generated from Municipal Solid Waste (MSW) landfill may cause various negative impacts, therefore it should be treated properly in a Leachate Treatment Plant (LTP). The paper aims to select a more sustainable LTP system in Indonesia by applying Analytic Network Process (ANP) as multicriteria analysis approach. 5 alternative LTP systems were analyzed using 5 criteria namely economic, environmental, social, technical, and institutional capacity with a total of 25 sub-criteria. Total 36 respondents from municipality staffs, academics, professionals, and LTP operators were interviewed by adopting pair wise comparison. The results from Driving Dependence Power Analysis (DDPA) showed that sub-criteria for operating costs (E2), maintenance costs (E3), processing effectiveness (T1) and monitoring needs (T3) have the highest dependence power value. Sub-criteria of the operational cost (E2) and the availability of regulations (K2) have the highest driving power value. Main considerations for selecting LTP system at a final disposal site by respondents were economic criteria (weight 0.3219) and water protection sub-criteria (L2, weight 0.17). Top priority of the technology chosen by respondents were Alternative#1 consist of Anaerobic, Facultative and Maturation ponds and Biofilter.

Seiring dengan pertambahan jumlah penduduk, timbulan sampah yang harus diangkut pun akan meningkat di Kabupaten Manokwari. Sistem pengangkutan existing yang belum optimal mengakibatkan sampah belum seluruhnya terangkut tepat waktu dan menumpuk di beberapa titik Tempat Penampungan Sementara (TPS). Kabupaten Manowkari dipilih karena baru 3 distrik dari total 4 distrik yang mendapatkan pelayanan pengangkutan sampah. Penelitian ini dilakukan untuk mengoptimasi rute pengangkutan sampah existing di Kabupaten Manokwari dengan menggunakan metode Vehicle Routing Problem (VRP) sehingga mendapatkan rute tercepat. Dari hasil sampling, didapatkan bahwa rerata timbulan sampah di 3 (tiga) Distrik terlayani sebesar 0,334 kg/orang/hari. Dengan rute existing, pengangkutan sampah membutuhkan waktu 3.289 menit/hari untuk menyelesaikan seluruh pengangkutan dari 25 unit TPS ke TPA Masiepi yang berlokasi di Distrik Manokwari Selatan. Optimasi rute pengangkutan menghasilkan total waktu 3.038 menit/hari, yaitu 251 menit/hari lebih cepat dibandingkan kondisi existing. Jumlah truk pengangkutan sampah yang dibutuhkan pun lebih sedikit, yaitu 13 unit dibandingkan kondisi existing yang sebanyak 15 unit. Dari studi ini memperlihatkan bahwa optimasi rute pengangkutan sampah bukan hanya dapat menghemat waktu pengangkutan tetapi juga mengurangi kebutuhan truknya, sehingga dapat pula mengurangi kebutuhan biaya untuk pengelolaan sampah secara keseluruhan di Kabupaten Manokwari.

An anaerobic digester system is a sequence of process to digest biodegradable waste into biogas in the absence of oxygen. In two-stage anaerobic digestion system acid-forming steps or hydrolysis stage are separated from the methane forming steps. Although hydrolysis stage tends to get too acidic, addition of alkali substance can prevent pH from dropping too low so as to maintain good decomposition condition for microorganism. Oyster shell powder is a useful pH control additive containing CaCO3 at high percentage that can neutralize acid. In this study, the performances between industry-made fine oyster shell (IOS) powder (size 10.5 µm) and manually ground oyster shell (OS) powder (size < 1 mm) in methane generation yield were compared. NaOH, which is an alkali reagent for controlling pH, also used in comparison. The result showed that at the end of the hydrolysis stage, IOS powder increased pH up to 6.63, NaOH did almost the same (6.72), and OS powder was the lowest (6.1). In liquid residue, ratio of inorganic ash content with IOS treatment was the highest (2.1 %), but OS was the lowest (1.4 %). In the methanogenesis stage, CH4 concentration with NaOH treatment was the highest (80 %) compared to oyster shell powders: 74.33 % in IOS and 74.24 % in OS. Average methane yield over observation period of IOS treatment was the highest (533.9 mL/gVS), followed by alkali (487.3 mL/gVS) and OS (413.7 mL/gVS). Total CH4 from IOS treatment was 37 % and 8 % higher than OS and alkali treatment. Powder size of oyster shell greatly affected pH control, methane yield, and solid-liquid separation, but not methane concentration. Using IOS powder as pH control in hydrolysis of two-stage anaerobic system resulted in 78 % less cost than using NaOH.

Tempat Pengolahan dan Pemrosesan Akhir Sampah Regional Lulut Nambo (TPPAS Nambo) direncanakan oleh Pemerintah Provinsi Jawa Barat untuk melayani 4 wilayah yaitu Kota Depok, Kota Bogor, Kabupaten Bogor, dan Kota Tangerang Selatan. Tujuan penelitian adalah menganalisis berbagai alternatif skenario kebijakan guna mengoptimalkan pelayanan pengelolaan sampah di 4 wilayah tersebut dan mengetahui pengaruhnya terhadap sampah yang terangkut ke TPPAS Nambo dengan pendekatan model sistem dinamik. Simulasi dilakukan terhadap 4 skenario yaitu business as usual (BAU), optimalisasi fasilitas pengolahan sampah eksisting, implementasi rencana induk pengelolaan sampah daerah (masterplan), dan implementasi Kebijakan Strategi Daerah (Jakstrada) pengelolaan sampah. Dari hasil simulasi mulai tahun 2020 hingga 2045, didapat bahwa keempat kota di atas tidak dapat hanya mengandalkan keberadaan TPPAS Nambo yang memiliki keterbatasan kapasitas pengolahan, sehingga kehadiran Tempat Pemrosesan Akhir (TPA) di masing-masing kota/kabupaten masih tetap diperlukan. Dari hasil simulasi didapat bahwa Skenario Jakstrada merupakan skenario yang paling optimal adalah bila mempertimbangkan jumlah timbulan sampah yang harus dikelola, biaya pengangkutan, kebutuhan lahan untuk TPA dan emisi lingkungan, walaupun mensyaratkan adanya kebutuhan fasilitas penanganan sampah di sumber yang lebih besar. Perkiraan biaya pengolahan sampah dari Skenario Jakstrada untuk masing-masing Kota Depok, Kota Bogor, Kabupaten Bogor dan Kota Tangerang Selatan adalah sebesar Rp 297.584/ton, Rp 543.345/ton, Rp 285.532/ton, dan Rp 305.902/ton. Dari validasi model terbukti bahwa sistem dinamik dapat diaplikasikan untuk menganalisis keterkaitan berbagai macam faktor yang perlu dipertimbangkan dalam proses perencanaan untuk mencapai pengelolaan sampah yang berkelanjutan.

Sanitary condition is one of the components that influencing public health. Bogor Regency has total area 2,663.81 km 2 , with total population 5,965,410 in 2019. The sanitation of Bogor Regency nearly 100% is using on-site systems. Utilization of septic tank reduces the level of contamination of surface water and groundwater. However, the sludge still containing high E. Coli that potentially caused diarrhea, vomiting disease, and others, so that the handling of the sludge needs Faecal Sludge Treatment Facilities (FSTF). Before 2016, Bogor Regency already had 10 units of faecal suction truck services, but the disposal process still was done in Kalimulya FSTF, Depok City. So, this study aims to find a feasible FSTF site location which fulfils the spatial plan, technical, and non-technical criteria. The process on the determining feasible FSTF location was employing multicriteria analysis by using Geographic Information Systems (GIS) and Analytical Hierarchy Process (AHP). Several spatial data such as the land slope, the soil type, distance from water bodies/river, the administration of Bogor Regency, as well as land use and land capability were used for FSTF site selection. Spatial analysis using GIS results in 22 locations in 15 different districts. By reconsidering the area, only 8 selected locations were surveyed and evaluated using AHP. Based on the weighting, the locations which chosen for the eastern, central, and western parts of Bogor are Cileungsi, Cibinong, and Cigudeg districts respectively.

Abstrak: Dalam industri pertambangan mineral, smelter merupakan bagian dari proses produksi, mineral yang ditambang dari alam biasanya masih tercampur dengan material lainnya sehingga membutuhkan pengolahan lebih lanjut. Studi kasus yang diangkat dalam penelitian ini adalah salah satu perusahan pertambangan nikel di Sulawesi Selatan yang mempunyai fasilitas pengolahan smelter terpadu untuk memproduksi nikel matte memberikan banyak dampak bagi para stakeholder terutama untuk lingkungan. Dampak tersebut adalah emisi berupa debu/abu dan gas NOx, CO dan SOx sehingga memerlukan alat pengendalian emisi. Perusahaan telah melengkapi setiap prosesnya dengan berbagai alat pengendalian emisi terutama dengan jenis pengendalian partikulat dan gas. Analisis biaya manfaat digunakan untuk menghitung relevansi biaya dan manfaat yang dihasilkan oleh aktivitas smelter pengolahan nikel terhadap para stakeholder yaitu Perusahaan, pemerintah, masyarakat serta lingkungan sekitar. Hasil valuasi ekonomi lingkungan terhadap daerah dampak smelter yaitu Kecamatan Nuha dan Danau Matano bernilai Rp 690,981,051,000.00 yang menjadi komponen manfaat eksternal dalam perhitungan rasio biaya manfaat. Didapatkan nilai manfaat total sebesar Rp 1,113,186,993,242.54 dan nilai biaya total Rp 1,040,441,890,033.89 dengan nilai rasio manfaat biaya sebesar 1.07 yang berarti smelter nikel Perusahaan tersebut mempunyai manfaat dan layak untuk diusahakan. Kata kunci: analisis biaya manfaat, smelter nikel, ekonomi lingkungan, valuasi ekonomi lingkungan. Abstract: In the mineral mining industry, the smelter is part of the production process, a mineral mined from nature usually is mixed with other materials that require further processing. Case Study for the research is a nickel mining company in South Sulawesi which has an integrated smelter processing facility to produce nickel matte, leave much impact for stakeholders, especially to the environment. These impacts are emissions of dust/ash and gas NOx, CO and SOx that require emission control equipment. PT. Vale Indonesia has equipped each process with various emission control equipment, especially with the kind of control particulates and gas.Cost benefit analysis used to calculate the relevance of the costs and benefits generated by the activity of smelter processing of nickel to the stakeholders, namely the company itself, the government, society and the surrounding environment. The results of the economic valuation of the environmental impact of the smelter area the District Nuha and Lake Matano worth Rp 690,981,051,000.00 that are components of external benefits in the calculation of benefit cost ratio. Total benefit value obtained Rp 1,113,186,993,242.54 and value of the total cost of Rp 1,040,441,890,033.89 the cost benefit ratio of the value of 1.07, which means the nickel smelter of the company has benefits and worth to be efforted. Keywords: cost benefit analysis, nickel smelter, enviromental economic, enviromental economic valuation.

Pasar Ujungberung merupakan salahsatu pasar tradisional di Kota Bandung yang aktivitas jual-belinya masih ramai dan berdampak pada kebutuhan pengelolaan sampah yang lebih baik. Agar dapat dilakukan pengelolaan sampah yang baik maka dibutuhkan data timbulan yang lebih presisi. Paper ini bertujuan untuk mengetahui timbulan sampah tersebut melalui pelaksanaan prosedur sampling sesuai dengan SNI selama 8 hari berturut-turut. Jumlah keseluruhan kios yang aktif digunakan untuk jual-beli adalah 565 kios dengan jumlah responden untuk sampling dan kuesioner sebanyak 85 kios. Rerata timbulan sampah tertinggi dan terendah masing-masing berasal dari kios makanan jadi (3,16 kg/hari) dan kios hasil bumi (0,02 kg/hari). Berdasarkan unit yang mungkin berpengaruh pada timbulan sampahnya, maka secara rerata timbulan sampah perhari di Pasar Ujungberung adalah 0,464 kg/kios, 0,109 kg/m2 kios, 0,240 kg/karyawan, 0,047 kg/jam operasional. Walaupun komposisi jenis sampah yang dihasilkan dari setiap kios berbeda, plastik, organik dan kertas merupakan tiga jenis sampah yang diprediksi dominan dihasilkan dari Pasar Ujungberung. Berdasarkan observasi lansung dan wawancara diketahui bahwa sebagian besar pedagang membuang sampahnya dengan menggunakan kresek plastik ke lokasi penampungan sampah terdekat. Data timbulan sampah yang diperoleh dari studi ini dapat digunakan untuk memprediksi timbulan sampah di pasar tradisional lain sehingga perencanaan pengelolaan sampah dapat dilakukan dengan lebih baik.

ABSTRACTIn order to create a city clean, efforts are taken by the government, including the provision of waste processing system facilities as part of a waste management system. Recently, Klungkung Regency, Bali Province, has three alternatives waste processing systems to be applied, namely: utilizing the existing regional final disposal site (TPA) of Bangli, building a new TPA facility dedicated to Klungkung area only, and communal waste processing facility. The study aims to determine the most optimal waste processing system by considering four criteria (multicriteria) with the Analytical Hierarchy Process (AHP) from 35 respondents representing five local government institutions. Among the criteria, environment (weight of 0.543) was more prioritized than social (0.181), financial (0.146) and technical (0.130) aspects. Respondents preferred to put environmental pollution prevention (weight of 0.16) as the most important among 13 sub-criteria. Other results showed that TOSS (total value of 0.47) was more preferred than the existing TPA of Bangli (0.28) and new the TPA of Klungkung (0.25). An alternative waste processing with its advantages and disadvantages should be chosen and acceptable by the related stakeholders. Thus, the facility becomes part of a sustainable waste management system in a city.Keywords: multicriteria analysis, pair wise comparison, analytical hierarcy process, waste processing systemABSTRAKBerbagai macam upaya dilakukan oleh pemerintah untuk menciptakan lingkungan suatu kota yang bersih, diantaranya melalui penyediaan fasilitas sistem pemrosesan sampah sebagai tahapan akhir dalam pengelolaan sampah. Saat ini, Kabupaten Klungkung, Propinsi Bali, memiliki 3 alternatif sistem pemrosesan sampah yang dapat diaplikasikan, yaitu: menggunakan tempat pemrosesan akhir sampah (TPA) eksisting Regional Bangli, membangun TPA baru tersendiri untuk Klungkung, dan pemrosesan skala komunal (misalnya berupa Tempat Olah Sampah Setempat/TOSS). Penelitian ini bertujuan untuk memilih sistem pemrosesan sampah yang paling optimal dengan mempertimbangkan 4 kriteria (multicriteria) dengan menggunakan pendekatan Analytical Hierarchy Process (AHP) dari 35 orang responden yang mewakili 5 institusi pemerintahan daerah. Urutan kriteria yang dianggap lebih penting adalah lingkungan (nilai bobot 0,543), sosial (0,181), finansial (0,146) dan teknis (0,130). Responden lebih memilih pencegahan pencemaran lingkungan (nilai bobot 0,16) sebagai subkriteria terpenting dari total 13 subkriteria. Sedangkan alternatif pemrosesan sampah skala komunal dianggap yang paling optimal (total nilai 0,47) disusul TPA Regional Bangli (0,28), terakhir TPA baru (0,25). Suatu alternatif sistem pemrosesan sampah dengan kelebihan dan kekurangan masing-masing harus dipilih yang paling dapat diterima oleh berbagai stakeholders terkait sehingga diharapkan dapat menjadi bagian dari suatu sistem pengelolaan sampah yang berkelanjutan dari suatu kota.Kata Kunci: analisis multikriteria, perbandingan berpasangan, analytical hierarchy process, sistem pemrosesan sampah

AbstrakBerbagai macam upaya dilakukan oleh pemerintah untuk menciptakan lingkungan suatu kota yang bersih, diantaranya melalui penyediaan fasilitas sistem pemrosesan sampah sebagai tahapan akhir dalam pengelolaan sampah. Saat ini, Kabupaten Klungkung, Provinsi Bali memiliki 3 alternatif sistem pemrosesan sampah yang dapat diaplikasikan, yaitu: menggunakan tempat pemrosesan akhir sampah (TPA) eksisting Regional Bangli, membangun TPA baru tersendiri untuk Klungkung, dan pemrosesan akhir di Tempat Olah Sampah Setempat (TOSS). Penelitian ini bertujuan untuk memilih sistem pemrosesan sampah yang paling optimal dengan mempertimbangkan 4 kriteria, yaitu lingkungan, ekonomi, sosial dan teknis (analisis multikriteria) dengan menggunakan pendekatan Analytical Hierarchy Process (AHP). Setiap kriteria memiliki beberapa sub kriteria yang dimintakan kepada 35 orang responden yang mewakili 5 institusi pemerintahan daerah terkait untuk dilakukan penilaian perbandingan berpasangan. Penilaian juga dilakukan untuk mengevaluasi setiap alternatif terhadap semua sub kriteria dan kriteria. Secara global, responden lebih memilih pencegahan pencemaran lingkungan (nilai bobot 0,16) sebagai sub kriteria terpenting dari total 13 sub kriteria yang tersedia. Urutan kriteria yang dianggap lebih penting adalah lingkungan (nilai bobot 0,543), sosial (0,181), ekonomi (0,146) dan teknis (0,130). Untuk alternatif pengolahan sampah di fasilitas TOSS dianggap yang paling optimal (total nilai 0,47) disusul TPA Regional Bangli (0,28), terakhir TPA baru (0,25). Suatu alternatif sistem pemrosesan sampah dengan kelebihan dan kekurangan masing-masing harus dipilih yang paling dapat diterima oleh berbagai stakeholder terkait sehingga diharapkan dapat menjadi bagian dari suatu sistem pengelolaan sampah yang berkelanjutan dari suatu kota.AbstractIn order to create a city clean, efforts are taken by government including provision of waste processing system facility as part of waste management system. Recently, Klungkung Regency, Bali Province has 3 alternatives of waste processing system to be applied, namely: utilizing the existing regional final disposal site (TPA) of Bangli, building a new TPA facility dedicated for Klungkung area only, and on-site waste processing facility (TOSS). The study aims to determine the most optimal of waste processing system by considering 4 criteria, namely environment, economic, social and technical (multicriteria analysis) with the help of Analytical Hierarchy Process (AHP). Each criterion having several sub criterions were assessed by 35 respondents representing 5 local government’s institutions by applying pair wise comparison. The asessement were also performed to evaluate the alternatives to the given criteria and sub criterion. In global, respondents preferred to put environmental pollution prevention (weight of 0.16) as the most important among total 13 sub criterions available. Among the criteria, environment (weight of 0.543) was more prioritized than social (0.181), economic (0.146) and technical (0.130) aspects. Other result showed that TOSS (total value of 0.47) was more preferred than existing TPA of Bangli (0.28), and new TPA of Klungkung (0.25). An alternative of waste processing with its advantages and disadvantages should be chosen and acceptable by the related stakeholders, thus the facility becomes part of sustainable waste management system in a city.

One of the government programs to achieve the target of the National Waste Management Policy and Strategy is to build a regional landfill. To support regional landfill operations, the local governments which have utilized regional landfill need to prepare policies and strategies for optimizing waste management services in their area. Depok City is one of four cities that will served by Nambo Regional Landfill. The purpose of this study was to analyze various alternative policy scenarios to optimize waste management services in Depok City and determine their effects on the amount of waste transported to Nambo Regional Landfill. The policy analysis method used simulation model with a dynamic system approach. The simulation was conducted from 2020 to 2045. There were four scenarios, namely business as usual scenario, scenario A for the optimization of existing waste treatment facilities, scenario B which was based on local waste management policies and strategies, and scenario C for achieving 30% target of waste reduction. The simulation results showed the waste generation in 2045 was estimated to reach 3,426 tons/day. Results from all scenarios showed that the amount of waste disposed to landfill exceeds the maximum waste input to Nambo Regional Landfill. From scenario C, the amount of waste to be processed in the local landfill in 2045 was at least 1,180 tons/day. Depok City has a huge amount of waste and will continue to increase, so it is necessary to add waste treatment facilities and local landfill for the next 26 years. Landfill needs can be reduced by increasing waste treatment, but it requires greater waste management costs.