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All Journal Jurna Beta Kimia Rekayasa: Jurnal Penerapan Teknologi dan Pembelajaran
Laksana, Mochamad Brian
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Chemical Engineering, Chemistry & Bioengineering Chemistry Education Other

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Sludge Filtration Installation Design for Wastewater Treatment in Industrial Areas Using Bar Screens, Sedimentation, and Silica Sand Filtration Methods Pita Rengga, Wara Dyah; Maulana, Dea; Widiastuti, Amelia Putri; Muna, Laili Nailil; Laksana, Mochamad Brian
Rekayasa Vol. 21 No. 2 (2023)
Publisher : Universitas Negeri Semarang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.15294/rekayasa.v21i2.32482

Abstract

Wastewater Treatment Plant is an important facility designed to process wastewater from various sources, such as households and industries, before it is discharged into the environment. The main purpose of WWTP is to eliminate or reduce contaminants in wastewater to meet the quality standards set by the government. The treatment process involves the screening stage of solid material, sludge sedimentation, and decomposition of biological or chemical contaminants. One of the main challenges in wastewater treatment is sludge carryover to the processing system, which can reduce pollutant parameters such as Biochemical Oxygen Demand, Chemical Oxygen Demand, Total Suspended Solids and ammonia. This study aims to design a sludge filtration system consisting of bar screening, sedimentation, and filtration unit with a combination of silica sand. The design is outlined in the form of a scientific article to contribute to the development of wastewater treatment studies. The bar screen is used to filter rough solids in the early stages, sedimentation is used to separate heavy particles using gravity, and the filtration unit is designed using a single silica sand filter to reduce TSS. With a processing discharge of 6,300 m³/day, the resulting design is expected to improve the operational performance of WWTPs, meet the wastewater quality standards according to PerMen LHK No. 16 of 2016, and produce good quality effluent BOD 13,43 mg/L, COD 40,47 mg/L, TSS 1,9 mg/L and ammonia 0,42 mg/L. The results of this planning provide a sustainable and efficient solution for wastewater treatment.
Ethyl Lactate as a Green Solvent in Terms of Sustainability and Economic Perspectives in Organic Synthesis Esterification: A Review Hidayat, Abian Hilmi; Laksana, Mochamad Brian; Zakariya, Zulfa
Jurnal Beta Kimia Vol 6 No 1 (2026): Volume 6 Issue 1, May 2026
Publisher : Universitas Nusa Cendana

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35508/jbk.v6i1.27652

Abstract

This study presents a comprehensive analysis of ethyl lactate as a sustainable green solvent in organic synthesis, with a focus on feedstock evaluation and economic feasibility. A systematic literature-based approach was employed, covering publications from 2020 to 2025, and assessing two key aspects: (i) the source and cost of feedstocks, including whey, sugarcane molasses, rice straw, and starch, and (ii) the performance of ethyl lactate in various organic transformations. Techno-economic analysis estimates the cost of production (CoP) of ethyl lactate from sugarcane molasses in the range of USD 1,300-1,500/ton, while production from rice straw is estimated at around USD 5,600/ton, highlighting the economic advantage of molasses-based routes. Ethyl lactate has also demonstrated high effectiveness, achieving yields of 90-95% in various reactions such as coupling, metathesis, and ester synthesis. These findings reinforce the potential of ethyl lactate to support the chemical industry's transition toward more environmentally friendly processes, offering a compelling combination of technical performance and economic viability.
Co-Authors Hidayat, Abian Hilmi Maulana, Dea Muna, Laili Nailil Wara Dyah Pita Rengga Widiastuti, Amelia Putri Zakariya, Zulfa