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All Journal International Journal of Marine Engineering Innovation and Research Journal Of World Science Journal Research of Social Science, Economics, and Management
Adi Surjosatyo
Universitas Indonesia
Automotive Engineering Computer Science & IT Control & Systems Engineering Decision Sciences, Operations Research & Management Economics, Econometrics & Finance Electrical & Electronics Engineering Energy Engineering Environmental Science Health Professions Industrial & Manufacturing Engineering Law, Crime, Criminology & Criminal Justice Materials Science & Nanotechnology Mechanical Engineering Physics Social Sciences Transportation

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Implementation of AHP and Fuzzy Topsis Methods with Techno Economic Analysis Selection of Appropriate Technology for Waste Management Case Study University of Indonesia Panji Utomo; Adi Surjosatyo
Journal Research of Social Science, Economics, and Management Vol. 4 No. 5 (2024): Journal Research of Social Science, Economics, and Management
Publisher : Publikasi Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.59141/jrssem.v4i5.752

Abstract

The "Zero Waste City" program is a waste management policy initiative in Depok City that has been implemented from 2016 to 2024. The primary objective of this program is to make the entire Depok City area free from all types of waste. However, the program's implementation faces challenges, leading to some areas in Depok City still struggling with waste issues. Universitas Indonesia, as a higher education institution located in Depok City, acknowledges the waste-related challenges in its surrounding environment. Therefore, the university is committed to actively participating in solving waste issues originating from its campus environment. This research aims to address waste issues at the source, particularly by applying appropriate technology based on the criteria and sub-criteria at Universitas Indonesia. This step is expected to contribute to reducing waste-related problems in Depok City and serve as an example of effective waste management from its source. Notably, Universitas Indonesia contributes to the accumulation of residual waste at TPA Cipayugn Depok, which has become increasingly concerning over time. The analysis in this study employs the Analytical Hierarchy Process (AHP) and Fuzzy Technique for Order Performance by Similarity to Ideal Solution (TOPSIS) methods to evaluate suitable waste management technologies for addressing the issues of residual waste accumulation. Additionally, techno-economic analysis is conducted to assess the feasibility of the selected technology. The project's feasibility evaluation parameters include Net Present Value (NPV), Internal Rate of Return (IRR), Payback Period (PBP), and Benefit Cost Ratio (BCR).
Systematic Analysis of Potential Marine Renewable Energy for Coastal Ecological Balance on Bawean Island: A Review Wanda Rulita Sari; Gunawan Budiyanto; Adi Surjosatyo; Dimas Angga Fakhri Muzhoffar
International Journal of Marine Engineering Innovation and Research Vol. 9 No. 2 (2024)
Publisher : Department of Marine Engineering, Institut Teknologi Sepuluh Nopember

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.12962/j25481479.v9i2.4995

Abstract

Bawean Island displays significant natural potential with abundant natural resources and natural beauty that is attractive for tourism and industrial development. However, this potential is threatened by various environmental and socio-economic problems such as limited availability of clean water, erosion of coastal structures, accumulation of rubbish, economic challenges, and low levels of community education. To overcome these challenges, an integrated and sustainable approach is needed that involves the government, community, and other related parties in sustainable natural resource management and considers ecological, economic, and social aspects. Systematic analysis is carried out to understand the potential of coastal natural resources and the problems that threaten the ecosystem. An integrated and sustainable approach is needed, involving collaboration between government, society, and related parties. The integration of new technologies, including renewable energy technologies, was identified as a potential solution to several specific problems, such as waste management and clean water supply. An integrated and sustainable approach is analyzed by involving collaboration between government, society, and related parties. With collaboration and a deep understanding of the challenges and potential of Bawean Island, it is hoped that a sustainable coastal ecological balance can be achieved for the welfare of the environment and local communities.
Retrofitting Digestate Recirculation System to Improve Methane Yield in Anaerobic Digestion Elang Nur Reiz M N Insaani; Hafif Dafiqurrohman; Adi Surjosatyo; Cindy Rianti Priadi; Baskoro Lokahita
Journal of World Science Vol. 5 No. 6 (2026): Journal of World Science
Publisher : Riviera Publishing

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.58344/jws.v5i6.1675

Abstract

Digestate recirculation has gained attention as a promising strategy to enhance methane production. By reintroducing acclimatized microorganisms and residual biodegradable compounds into Anaerobic digestion (AD) system, this approach can potentially improve process stability and biogas quality. To systematically evaluate these effects, modeling and simulation offer a reliable framework for assessing methane yield. This study aims to assess the feasibility of simulating methane production from an anaerobic digestion reactor using food waste (FW) as the primary feedstock, incorporating a digestate recirculation system. It is hypothesized that recirculated digestate, due to its high organic content and catalytic properties, can effectively enhance biogas quality and optimize energy recovery from the system. A process flow diagram was developed in Aspen Plus® version, incorporating the four main biochemical stages: hydrolysis, acidogenesis, acetogenesis, and methanogenesis. The Non-Random Two-Liquid (NRTL) thermodynamic model was applied to represent polar mixture components, and a total of 46 governing equations were implemented to describe anaerobic digestion kinetics and mass balances. Model performance was validated against data reported in previous studies. Simulation results indicate that increasing the recirculation ratio up to 30% into feedstock mixture enhances both methane up to 25% higher compared to baseline and biogas production up to 32% higher than baseline. The findings demonstrate that the usage of recirculated digestate could improve the biogas quality. The developed modeling framework shows strong potential for scalability and can be applied to optimize methane production in anaerobic digestion systems with similar feedstock compositions and operating conditions.
Implementation of AHP and Fuzzy Topsis Methods with Techno Economic Analysis Selection of Appropriate Technology for Waste Management Case Study University of Indonesia Panji Utomo; Adi Surjosatyo
Journal Research of Social Science, Economics, and Management Vol. 4 No. 5 (2024): Journal Research of Social Science, Economics, and Management
Publisher : Publikasi Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.59141/jrssem.v4i5.752

Abstract

The "Zero Waste City" program is a waste management policy initiative in Depok City that has been implemented from 2016 to 2024. The primary objective of this program is to make the entire Depok City area free from all types of waste. However, the program's implementation faces challenges, leading to some areas in Depok City still struggling with waste issues. Universitas Indonesia, as a higher education institution located in Depok City, acknowledges the waste-related challenges in its surrounding environment. Therefore, the university is committed to actively participating in solving waste issues originating from its campus environment. This research aims to address waste issues at the source, particularly by applying appropriate technology based on the criteria and sub-criteria at Universitas Indonesia. This step is expected to contribute to reducing waste-related problems in Depok City and serve as an example of effective waste management from its source. Notably, Universitas Indonesia contributes to the accumulation of residual waste at TPA Cipayugn Depok, which has become increasingly concerning over time. The analysis in this study employs the Analytical Hierarchy Process (AHP) and Fuzzy Technique for Order Performance by Similarity to Ideal Solution (TOPSIS) methods to evaluate suitable waste management technologies for addressing the issues of residual waste accumulation. Additionally, techno-economic analysis is conducted to assess the feasibility of the selected technology. The project's feasibility evaluation parameters include Net Present Value (NPV), Internal Rate of Return (IRR), Payback Period (PBP), and Benefit Cost Ratio (BCR).
Co-Authors Baskoro Lokahita Cindy Rianti Priadi Dimas Angga Fakhri Muzhoffar Elang Nur Reiz M N Insaani Gunawan Budiyanto Hafif Dafiqurrohman Panji Utomo Wanda Rulita Sari