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All Journal Jurnal Bahan Alam Terbarukan Jurnal Pengembangan Kota The Indonesian Journal of Planning and Development Journal of Environmental Science and Sustainable Development International Journal of Disaster Management Jurnal Teknologi Lingkungan
Kato, Shigeru
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Agriculture, Biological Sciences & Forestry Humanities Chemical Engineering, Chemistry & Bioengineering Civil Engineering, Building, Construction & Architecture Decision Sciences, Operations Research & Management Earth & Planetary Sciences Energy Engineering Environmental Science Materials Science & Nanotechnology Social Sciences

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STORAGE AND COLLECTION RIVER DEBRIS PLANNING IN TANGGUL RIVER SURAKARTA CITY, INDONESIA AS SOURCE OF WASTE MANAGEMENT USING THE MULTI-CRITERIA DECISION-MAKING METHOD Sari, Mega Mutiara; Inoue, Takanobu; Nafisah, Aninda Putri; Harryes, Regil Kentaurus; Yokota, Kuriko; Septiariva, Iva Yenis; Suhardono, Sapta; Kato, Shigeru; Notodarmojo, Suprihanto; Suryawan, I Wayan Koko
Journal of Environmental Science and Sustainable Development Vol. 5, No. 1
Publisher : UI Scholars Hub

Show Abstract | Download Original | Original Source | Check in Google Scholar

Abstract

The Tanggul River in Surakarta City is a tributary that empties into the Bengawan Solo River. Domestic activities located on river borders can pollute with the waste generation. Therefore, managing waste sources such as storage and collection is crucial in waste management. This study aims to analyze waste management from river debris storage and collection around the study site. The technique used in this research is direct observation of the study area and performing a decision analysis for alternative processing. Decision support system has one model, namely Multi-Criteria Decision Making for environmental development. The activities for collecting and sorting river debris in the Tanggul River are not yet available. The existing river debros collection used a 7 cm diameter net that has been installed at the sluice gate of the Tanggul River. Considering aspects or criteria in implementing accommodation activities needs to be carried out before determining the best alternative. Therefore, several measures need to be considered in determining the container based on SNI 19-2454-2002 concerning Operational Procedures for Urban Waste Management and Minister of Public Works Regulation Number 3 of 2013. The collection activity in alternative 1 uses the Brute Boom system: Heavy Duty Containment Boom equipped with a galvanized weir mesh net attached under the boom. The collection activity in alternative 2 uses a floating cube. The floating cube is a cube-shaped Waste holder that can float in the river to effectively hold waste floating on the surface of the river body. It is imperative to prevent river pollution from activities by providing infrastructure for storing and collecting waste. However, it does not have a more significant impact, such as the Tanggul River to the Bengawan Solo River in Surakarta City.
Decision Analysis of Alternative River Debris to Landfill Transportation Systems in Jakarta Sari, Mega Mutiara; Inoue, Takanobu; Harryes, Regil Kentaurus; Kato, Shigeru; Septiariva, Iva Yenis; Suhardono, Sapta; Notodarmojo, Suprihanto; Delu, Kevin Foggy; Suryawan, I Wayan Koko
The Indonesian Journal of Planning and Development Vol 7, No 1 (2022): February 2022
Publisher : Department of Urban and Regional Planning, Universitas Diponegoro

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14710/ijpd.7.1.14-20

Abstract

River debris in Jakarta is generated in several locations by conventional transportation. Waste transportation with traditional models is usually not time-efficient, primarily when river debris is generated every time. Transport systems that can be used for river debris include compactor systems, pre-compactor systems, and baller systems. This research uses literature study and secondary data in determining alternatives. Meanwhile, the alternative selection was carried out using the Multi-Criteria Decision Making (MCDM) method. This study uses four criteria for selecting alternatives: initial capital, type of transport container, operation and maintenance, and processing capability. The utility value of waste transportation with compaction and pre-compacting systems does not significantly have utility values of 0.722 and 0.833, respectively. At the same time, the baller system has a utility value of 0.222. This shows that the compacted system is more suitable to be applied to SPA river debris in Jakarta. The presence of a pr-compactor can also reduce the water content in-river debris.
Evaluating the Potential of Refuse Derived Fuel (RDF) in Cement Production: a Comparative Analysis of RDF Variations In Indonesia's Emplacement Pluit, Jakarta Sari, Mega Mutiara; Inoue, Takanobu; Septiariva, Iva Yenis; Yokota, Kuriko; Notodarmodjo, Suprihanto Mediawan; Kato, Shigeru; Suhardono, Sapta Cahya; Al Ghifari, Rizal Muhammad; Suryawan, I Wayan Koko
Jurnal Bahan Alam Terbarukan Vol 13, No 1 (2024): June 2024 [Nationally Accredited Sinta 2]
Publisher : Universitas Negeri Semarang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.15294/jbat.v13i1.47558

Abstract

This study critically evaluated the potential of Refuse Derived Fuel (RDF) as a sustainable substitute for coal in the cement manufacturing process. Using Emplacement Pluit's waste as a primary source, three distinct RDF variations were analyzed: RDF A (comprised purely of PET Charcoal), RDF B (a 50-50 combination of PET Charcoal and organic waste), and RDF C (solely organic waste). Among the parameters evaluated were moisture content, ash content, and calorific value. The results indicated RDF A's superior quality, with a moisture content of 2.6%, ash content of 0.7%, and a calorific value of 25.1 MJ/kg. In stark contrast, RDF C exhibited a high waste reduction potential at 80.5%, but its calorific value fell short of Korean standards. RDF B, balancing quality and reduction potential, achieved a 98.9% waste reduction and met Korean RDF standards, making it the most viable alternative to coal in cement production. The study underscores the significant potential of integrating RDF in industrial practices, particularly cement kilns. It offers insight into optimizing waste management strategies in line with the 'zero-waste' vision.
RIVER DEBRIS TRANSPORT PLANNING FROM SOURCE TO PUTRI CAMPO FINAL PROCESSING PLACE, SURAKARTA CITY Sari, Mega Mutiara; Inoue, Takanobu; Harryes, Regil Kentaurus; Yokota, Kuriko; Septiariva, Iva Yenis; Suhardono, Sapta; Kato, Shigeru; Notodarmojo, Suprihanto; Nafisah, Aninda Putri; Suryawan, I Wayan Koko
Jurnal Pengembangan Kota Vol 10, No 2: Desember 2022
Publisher : Diponegoro University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14710/jpk.10.2.118-126

Abstract

The waste from the river is one of the obstacles in managing the Bengawan Solo River, Surakarta City. River debris is usually collected in tributaries so as not to carry the pollutant load to the watershed, causing flooding, and then transported to the Final Processing Site (TPA). This study aims to analyze the waste transportation system from the source to the landfill. This research was conducted by direct observation and using Multi-Attribute Utility Theory (MAUT) for determination. Alternative waste transportation used are haul container system (HCS) and stationary container system (SCS). The criteria used are the number of ritations, price, ease of transportation, potential damage, maintenance, and type of container. Based on the weighting results on the MAUT analysis, transportation with the SCS method has a higher weight than the HCS method.
Influence of Tides Level on Tsunami Hydrodynamic in Banda Aceh, Indonesia Tursina, Tursina; Syamsidik, Syamsidik; Kato, Shigeru; Afifuddin, Mochammad
International Journal of Disaster Management Vol 6, No 3 (2023)
Publisher : TDMRC, Universitas Syiah Kuala

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24815/ijdm.v6i2.34538

Abstract

Tides are the dominant physical process in the coastal environment. During high tide, water from the ocean flows through the bays and estuaries, causing inundation and raising water elevation. When low tides condition, the water level becomes lower than average and recedes into the sea. This process continues for a long day. Tsunami waves will interact with all coastal processes and affect the hydrodynamic forces of tsunami waves. In the deep sea, tides do not significantly influence wave propagation. However, in the shallow water zone, tides can change tsunami heights and affect the extent of inundation. Tides are usually ignored in tsunami hazard analysis. This would be an underestimate of the tsunami hazard calculation. This study aims to investigate tides' influence on tsunami runup hydrodynamics in Banda Aceh. The potential tsunami from an earthquake in the Aceh-Andaman subduction zone is modeled using COMCOT (Cornell Multi Grid Coupled Tsunami Model) with magnitudes Mw 9.2, 8.6, and 8.2. We simulated the response of the three earthquake magnitudes on two different types of high and low tides. Several virtual gauges were placed to observe the tsunami height. Virtual gauges were also used to observe the tsunami arrival time at four tsunami escape buildings in Banda Aceh: the Ulee Lheue escape building, the Deah Glumpang escape building, the Alue Deah Teungoh escape building, and the Lambung escape building. The results show that the highest tide amplifies the tsunami inundation will be extended to about 30% farther inland compared to the condition if the tsunami occur during mean sea level condition.The interactions between tsunami and high tide significantly shorten tsunami arrival time on small magnitude tsunamis and are not significant in a large tsunami. This information is useful for enhancing early warning systems and evacuation procedures that can be adjusted to the tidal conditions in the study area.
Potential of Woody Biomass from River Debris for Thermal Process Fuel Sari, Mega Mutiara; Inoue, Takanobu; Harryes, Regil Kentaurus; Yokota, Kuriko; Septiariva, Iva Yenis; Suhardono, Sapta; Kato, Shigeru; Notodarmojo, Suprihanto; Delu, Kevin Foggy; Suryawan, I Wayan Koko
Jurnal Teknologi Lingkungan Vol. 25 No. 1 (2024)
Publisher : BRIN Publishing (Penerbit BRIN)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.55981/jtl.2024.3559

Abstract

Sampah perairan di Tempat Penampungan Sementara (TPS) Jakarta memberikan beban polusi yang signifikan akibat aktivitas manusia. Pemulihan energi menyajikan peluang untuk mendapatkan nilai dari puing-puing ini dan mencapai solusi limbah nol. Di antara komponen limbah di TPS Perintis, puing kayu dari puing-puing sungai di Jakarta mendominasi. Penelitian ini bertujuan untuk memproses puing kayu melalui proses termal di TPS Perintis. Penelitian ini menggunakan analisis hitungan beban di TPS Perintis dan melakukan pengujian laboratorium, termasuk analisis kadar air, analisis kadar abu, penentuan nilai kalor, dan thermal gravimetric analysis (TGA). Generasi harian sampah perairan di TPS Perintis rata-rata mencapai 716,4 m3/hari atau 5,2 ton/hari, dengan puing kayu menyumbang 62,8% dari total. Puing kayu menunjukkan potensi pemulihan energi tertinggi di antara komponen limbah, dengan nilai kalor sebesar 16,43 kWh/kg atau 54.123,38 kWh/hari. Hasil uji TGA menunjukkan bahwa puing kayu dapat digunakan sebagai arang, dengan dekomposisi terjadi pada rentang suhu 200–500°C dan hasil sisa sebesar 14%. Temuan ini menyoroti kelayakan pemulihan energi dari puing kayu di TPS Perintis dan potensi untuk mengubahnya menjadi arang. Kesimpulan penelitian ini menekankan pentingnya penggunaan proses termal dalam mengelola puing-puing sungai, menyediakan solusi berkelanjutan untuk pengelolaan limbah dan pelestarian lingkungan. Abstract River debris at the Waste Temporary Shelter (TPS) Perintis Jakarta poses a significant pollution load resulting from human activities. Energy recovery presents an opportunity to derive value from this debris and achieve a zero-waste solution. Among the waste components at TPS Perintis, wood debris from river debris in Jakarta is predominant. This study aimed to process the wood debris through a thermal process at TPS Perintis. The research employed load count analysis at TPS Perintis and conducted laboratory testing, including moisture content analysis, ash content analysis, calorific value determination, and thermal gravimetric analysis (TGA). The daily generation of river debris at TPS Perintis averaged 7.164 m3/day or 5.2 tons/day, with wood debris accounting for 62.8% of the total. Wood debris exhibited the highest potential for energy recovery among the waste components, with a calorific value of 16.43 kWh/kg or 54,123.38 kWh/day. The TGA test results indicated that wood debris could be utilized as charcoal, with decomposition occurring within the temperature range of 200–500°C and a residue yield of 14%. These findings highlight the feasibility of energy recovery from wood debris at TPS Perintis and the potential for its conversion into charcoal. The study's conclusions emphasize the significance of utilizing thermal processes for managing river debris, providing a sustainable solution for waste management and environmental conservation.
Co-Authors Al Ghifari, Rizal Muhammad Delu, Kevin Foggy Harryes, Regil Kentaurus Kuriko Yokota Mochammad Afifuddin Nafisah, Aninda Putri Notodarmodjo, Suprihanto Mediawan Sari, Mega Mutiara Septiariva, Iva Yenis Suhardono, Sapta Suhardono, Sapta Cahya Suprihanto Notodarmojo Suryawan, I Wayan Koko Syamsidik, Syamsidik Takanobu Inoue Tursina Tursina