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Mentari, Okti Dinasakti Nurul
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Energy Engineering Environmental Science Immunology & microbiology Public Health

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Analisis Kelayakan Ekonomi Koagulan Biji Kelor dalam Menurunkan Konsentrasi Parameter Limbah Cair Tahu Sinaga, Ruth Stefanie; Adzillah, Wilma Nurrul; Mentari, Okti Dinasakti Nurul
Jurnal Teknologi Lingkungan Lahan Basah Vol 13, No 2 (2025): July 2025
Publisher : Universitas Tanjungpura

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26418/jtllb.v13i2.94320

Abstract

The tofu industry in Karawang Regency produces liquid waste with high BOD, COD, and TSS content that can pollute the environment. The study aims to test the effectiveness of moringa seeds (Moringa oleifera) as a natural coagulant in reducing these pollutant parameters and to assess its economic feasibility. The method used involved laboratory testing with coagulation-flocculation processes using varying doses of moringa seed powder (11g, 13g, 15g, and 17g), followed by analysis of BOD, COD, and TSS. Financial viability was analyzed using the NPV, IRR, and Net B/C Ratio indicators. The results showed that a dose of 13 grams reduced COD by 57.51% and BOD by 34.63%, while TSS decreased by 59.06% at a dose of 11 grams. Financial analysis indicates that the use of moringa seeds as a coagulant is feasible with an NPV of Rp5,754,422, an IRR of 13.75%, and a Net B/C Ratio of 1.09. Thus, moringa seeds have proven to be effective and economical as a natural coagulant in soybean curd wastewater treatment and can serve as an environmentally friendly alternative for small-scale industries.
Proyeksi Kebutuhan Air Bersih Kabupaten Karawang Tahun 2024-2044 Hasan, Muwaffaq Saparudin; Adzillah, Wilma Nurrul; Mentari, Okti Dinasakti Nurul
Jurnal Teknologi Lingkungan Lahan Basah Vol 13, No 2 (2025): July 2025
Publisher : Universitas Tanjungpura

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26418/jtllb.v13i2.95544

Abstract

Karawang Regency, as an area experiencing rapid population growth and industrial development, faces serious challenges in the provision of clean water. This study aims to project the clean water demand in Karawang Regency up to the year 2044 using a quantitative descriptive method and an exponential projection model. The data used include population figures, clean water customer data, and the volume of water sold by Perumdam Tirta Tarum. The projection results indicate a significant increase in clean water demand from 898,17 liters/second in 2024 to 7.970,48 liters/second in 2044. This increase is driven by population growth, expanded service coverage, and the development of non-domestic sectors. The results of this study are expected to serve as a basis for sustainable clean water supply system planning in Karawang Regency.
Komparasi Efektivitas PAC dengan Biokoagulan Musa paradisiaca L. pada Limbah Cair Industri Tahu Mendrofa, Cynthia Alvionie Erza; Adzillah, Wilma Nurrul; Mentari, Okti Dinasakti Nurul
Jurnal Teknologi Lingkungan Lahan Basah Vol 13, No 2 (2025): July 2025
Publisher : Universitas Tanjungpura

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26418/jtllb.v13i2.94318

Abstract

The peel of Kepok banana (Musa paradisiaca L.) can be utilized as an environmentally friendly coagulant in the treatment of tofu industry wastewater. This study examined the effectiveness of the bio-coagulant derived from Kepok banana peel in comparison to the chemical coagulant Poly Aluminium Chloride (PAC) in reducing pollutant concentrations in the tofu industry "X". The coagulation-flocculation process was conducted at laboratory scale with varying coagulant doses of 0.4 g/L, 1.2 g/L, 2 g/L, and a control test. The mixing process involved rapid stirring at 200 rpm for 5 minutes, followed by slow stirring at 40 rpm for 10 minutes, and settling for an hour. The wastewater pH was optimized to 8. The results showed that a 0.4 g/L dose of Kepok banana peel reduced BOD levels by 29.8%, COD by 58%, and TSS by 41%. For comparison, a 0.4 g/L dose of PAC demonstrated higher effectiveness, reducing BOD by 26.8%, COD by 56%, and TSS by 28%.
Co-Authors Adzillah, Wilma Nurrul Hasan, Muwaffaq Saparudin Mendrofa, Cynthia Alvionie Erza Sinaga, Ruth Stefanie