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All Journal International Journal of Marine Engineering Innovation and Research SWAGATI: Journal of Community Service
Rizka Lestari
Institut Teknologi Kalimantan
Automotive Engineering Civil Engineering, Building, Construction & Architecture Computer Science & IT Control & Systems Engineering Decision Sciences, Operations Research & Management Economics, Econometrics & Finance Electrical & Electronics Engineering Energy Engineering Environmental Science Industrial & Manufacturing Engineering Materials Science & Nanotechnology Mechanical Engineering Physics Social Sciences Transportation Other

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Degradation of Lignocellulose Biomass into Bio-oil and Biochar by Hydrothermal Liquefaction (HTL) Rizka Lestari; Lalak Tarbiyatun Nasyin Maleiva; Ahmad T Yuliansyah; Asful Hariyadi; Fadhil Muhammad Tarmidzi
International Journal of Marine Engineering Innovation and Research Vol. 10 No. 1 (2025)
Publisher : Department of Marine Engineering, Institut Teknologi Sepuluh Nopember

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.12962/j25481479.v10i1.4739

Abstract

Communities around the world are becoming more concerned about the environmental impact of using and heavily relying on fossil fuels, leading to a growing popularity of sustainable energy solutions. Biomass energy has become a popular topic of study around the world due to its sustainability. This study aims to investigate the feasibility of biomass waste valorization through its thermochemical or biochemical conversion into a sustainable, high-value energy commodity, thereby augmenting its economic and environmental value proposition. Hydrothermal liquefaction (HTL) was identified as the most effective method for treating biomass waste. Experiments were carried out by mixing water and biomass waste in a 500 mL autoclave batch reactor at temperatures ranging from 270 °C to 330 °C, with b/w ratios of 1:20, 2:20, and 3:20 and a retention time of 30 minutes. This study was additionally carried out under a starting pressure of 5 bar. Bio-oil had the highest product dispersion (84% at 330°C and a b/w ratio of 3:30). Meanwhile, the biochar yield was less than 10%. The solid product, on the other hand, had GCV values that were about the same as bituminous and sub-bituminous coals, at 6474 and 4888 cal/g, respectively. The carbon content of biochar at 270°C and 330°C is 50.86% and 66.77%, respectively, resulting from a variable b/w ratio of 2:20. GC-MS analyzed the highest-yielding product, bio-oil. The GC-MS study revealed a number of value-added chemicals resulting from the breakdown of hemicellulose, cellulose, and lignin compounds.
Innovation in Membrane-Based Batik Liquid Processing at Sekar Buen Batik Small and Medium Enterprises Moch Purwanto; Rizka Ayu Yuniar; Rizka Lestari; Asful Hariyadi; Jefri Pandu Hidayat; Intan Dwi Wahyu Setyo Rini; Asri Prasaningtyas; Didik Kiswoyo
SWAGATI : Journal of Community Service Vol. 3 No. 2 (2025): July
Publisher : Universitas AMIKOM Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24076/swagati.2025v3i2.1994

Abstract

The process of processing batik liquid waste using membrane technology has been implemented to overcome the problem of batik waste in the Sekar Buen Batik IKM Area through a community service program. The method used is the batik liquid waste filtration technique using a membrane. This community service activity is an effort to help strengthen the human resources of the batik industry community in the liquid waste processing process at the Sekar Buen Batik IKM located in North Penajam Paser. The activity has been carried out in several stages, including a preliminary survey, a discussion forum on batik waste problems with a partner team, making a design for a waste processing system based on membrane technology and working practices for the tool. This program can help partners in processing batik wastewater so that it can reduce its negative impact on the environment. The results of the program show that partners have an understanding of the technique of processing batik liquid waste based on membrane technology. Thus, industrial activities at the Sekar Buen Batik IKM can support the green industry area and be more environmentally friendly.
Co-Authors Ahmad T Yuliansyah Asri Prasaningtyas Didik Kiswoyo Fadhil Muhammad Tarmidzi Hariyadi, Asful Intan Dwi Wahyu Setyo Rini Jefri Pandu Hidayat Mochammad Purwanto Rizka Ayu Yuniar