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All Journal Jurnal Presipitasi : Media Komunikasi dan Pengembangan Teknik Lingkungan
Yustina Metanoia Pusparizkita
Universitas Diponegoro
Agriculture, Biological Sciences & Forestry Earth & Planetary Sciences

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The Moisture Content of Sawdust Fuel Pellets at Different Drying Periods Junaidi Junaidi; Yustina Metanoia Pusparizkita; Attaya Juliatiko; Ngakan Ade Rahmadiputra; Sudarno Sudarno
Jurnal Presipitasi : Media Komunikasi dan Pengembangan Teknik Lingkungan Vol 19, No 3 (2022): November 2022
Publisher : Universitas Diponegoro

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14710/presipitasi.v19i3.599-606

Abstract

The development of pellet fuel from biomass has a great opportunity because Indonesia is an agricultural country. Utilizing this biomass can increase economic value, minimize waste generated, and reduce emissions released into the environment. In this study, the pellet fuel was made from sawdust obtained from the Semarang wood sawmill industry. The raw materials are mixed with adhesive, water and then formed using a pellet machine. The high water content in the pellets that have just come out of the pelletizing (27%) process requires drying treatment. The aim of this work was to find out the effect of drying time on the moisture content of the pellet fuel to meet existing standards. The variation of drying time used is 10, 15 and 20 minutes at 100° C. The results showed that the moisture content of the pellet was 22% (10 min), 19% (15 min) and 17% (20 min). The water content in the pellets will decrease 4% on average along with the drying time. However, the water content was still slightly higher than the specified standard (8-13%). Based on model predictions, the necessary drying time is 30-35 min. Ash content obtained from this study is 0.7%. The drying time can affect the density of the resulting pellet product.  Accordingly, further studies are needed to determine the drying optimum temperature.
Organic Solid Waste Management by Producing Eco-Enzymes from Fruit Skin in Permata Tembalang Budi Prasetyo Samadikun; Sudarno Sudarno; Yustina Metanoia Pusparizkita; Nurandani Hardyanti; Fathan Syahreza Pratama; Rahayu Puji Safitri
Jurnal Presipitasi : Media Komunikasi dan Pengembangan Teknik Lingkungan Vol 20, No 1 (2023): March 2023
Publisher : Universitas Diponegoro

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14710/presipitasi.v20i1.21-30

Abstract

The Ministry of Environment and Forestry in 2020 estimates that waste dumps in Indonesia will be 67.8 million tons. However, organic waste management in Indonesia is still relatively low. The accumulation of organic waste in the landfill, which usually causes unpleasant odors and potentially cause an explosion due to the production of methane gas from natural decomposition processes, can be avoided by prioritizing waste management from the source. An alternative way to handle organic waste is make eco-enzymes because it is efficient, economical, and environmentally friendly. This is the focus of the community service team. The community service method is carried out in three stages, including the preparation stage, the implementation stage, and the final stage. The preparation stage consists of doing a module for sorting organic waste and its utilization (making eco-enzymes). The next phase consists of socialization, education, and training on sorting organic waste and making the right eco-enzymes. The final stage consists of evaluation and making a final report. The expected result after education, socialization, or training has been carried out by the community service team, the community members, especially RT 04      RW 05 Permata Tembalang, know better and understand the sorting and utilization of organic waste. 
Co-Authors Attaya Juliatiko Budi Prasetyo Samadikun Fathan Syahreza Pratama Junaidi Junaidi Ngakan Ade Rahmadiputra Nurandani Hardyanti Rahayu Puji Safitri Sudarno Sudarno