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All Journal Specta Journal of Technology Journal of Multidisciplinary Science: MIKAILALSYS
Rina Noor Hayati
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Agriculture, Biological Sciences & Forestry Chemical Engineering, Chemistry & Bioengineering Civil Engineering, Building, Construction & Architecture Computer Science & IT Electrical & Electronics Engineering Environmental Science Physics Social Sciences Other

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Aplikasi Campuran Ekstrak Kulit Nanas dan Biji Pepaya sebagai Biokoagulan untuk Penurunan Fe, Mn, dan Kekeruhan pada Air Asam Tambang dengan Metode Jar Test Ismi Khairunnissa Ariani; Rina Noor Hayati; Riza Hudayarizka; Cut Keumala Banaget; Krisma Nabilla
SPECTA Journal of Technology Vol. 9 No. 3 (2025): Specta Journal of Technology
Publisher : LPPM ITK

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35718/specta.v9i3.8481486

Abstract

Acid mine drainage can pollute the environment if not treated properly. Acid mine drainage can be treated using the coagulation-flocculation jar test method with pineapple peel and papaya seed biocoagulants to reduce the contaminants contained therein. The purpose of this study was to determine the characteristics of acid mine drainage, analyze the effect of biocoagulant dosage and analyze the variation of slow stirring time in reducing Fe, Mn, Turbidity parameters in Acid Mine Drainage. The research variables used were biocoagulant dosage of 0.5 - 2.5 gr/500 mL and slow mixing time of 10 - 30 minutes. Based on the characteristic test, acid mine drainage has content that exceeds the quality standard. The optimum biocoagulant dose was 0.5 gr/500 mL with Fe parameter removal efficiency of 66.56% with a concentration of 18.3 mg/L, Mn of 8.71% with a concentration of 12.78 mg/L, and Turbidity of 78.87% with a concentration of 5.33 NTU. The optimum stirring time is 10 minutes with Fe removal efficiency of 61.71%, Mn of 71.18%, and Turbidity of 63.12%.
Application of Mung Bean Biocoagulant for Tofu and Tempeh Wastewater Treatment Ismi Khairunnissa Ariani; Rina Noor Hayati; Sukma Agustina; Riza Hudayarizka
Journal of Multidisciplinary Science: MIKAILALSYS Vol 4 No 2 (2026): Journal of Multidisciplinary Science: MIKAILALSYS
Publisher : Darul Yasin Al Sys

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.58578/mikailalsys.v4i2.11226

Abstract

Wastewater generated from tofu and tempeh production commonly contains high organic loads and suspended particles, necessitating environmentally sustainable treatment methods. This study investigated the use of mung bean (Vigna radiata) as a biocoagulant for reducing chemical oxygen demand (COD) and turbidity and improving the pH of tofu and tempeh wastewater. The study evaluated the effect of extraction with 1 M NaCl on biocoagulant performance, determined the optimum biocoagulant dosage, and assessed the influence of slow-mixing time on treatment effectiveness. Coagulation–flocculation was performed using mung bean biocoagulants before and after NaCl extraction, with dosages ranging from 1 to 5 g per 500 mL of wastewater and slow-mixing times ranging from 15 to 35 minutes. Initial characterization indicated that several wastewater quality parameters exceeded the applicable discharge standards. The NaCl-extracted biocoagulant performed better than the unextracted biocoagulant, achieving COD and turbidity removal efficiencies of 9.95% and 90.98%, respectively, with a final pH of 7.27. Across the dosage variations, the highest COD removal efficiency of 41.45% was obtained at 4 g/500 mL, whereas the highest turbidity removal efficiency of 91.17% was achieved at 2 g/500 mL. The highest final pH of 7.81 was recorded at 5 g/500 mL. The optimum slow-mixing time was 15 minutes, resulting in COD removal of 14.26%, turbidity removal of 87.45%, and a final pH of 7.19. These findings demonstrate that NaCl-extracted mung bean biocoagulant has considerable potential for improving tofu and tempeh wastewater quality, particularly through turbidity removal. The study contributes to the development of plant-based biocoagulants as an environmentally sustainable alternative for wastewater treatment, although optimization remains necessary to improve COD removal efficiency.
Life Cycle Assessment Approach of the Tofu Industry in SSIC Balikpapan City to Support SDGs Muhamad Nur Ibnu Luthfi Saud; Rina Noor Hayati; Muhammad Ma'arij Harfadli; Dinda Jasmine Hasanah
Journal of Multidisciplinary Science: MIKAILALSYS Vol 4 No 2 (2026): Journal of Multidisciplinary Science: MIKAILALSYS
Publisher : Darul Yasin Al Sys

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.58578/mikailalsys.v4i2.11277

Abstract

The tofu industry constitutes 76% of the enterprises operating in the Somber Small Industry Center (SSIC) of Balikpapan City. Most producers continue to rely on conventional production methods to minimize operating costs, despite their adverse environmental consequences. This study assessed the environmental impacts of tofu production in SSIC Balikpapan and formulated environmentally sustainable improvement strategies using a life cycle assessment (LCA) approach. A quantitative field-survey design was employed, covering all 56 operating tofu industries. Data were collected through interviews, field observations, and documentation, while inventory data were analyzed using SimaPro software and the ReCiPe 2016 Midpoint (H) method. The assessment applied a gate-to-gate system boundary, encompassing production processes from raw material inputs to finished tofu products over a one-year period. The findings showed that the dominant environmental impact categories were human carcinogenic toxicity at 437,000 pt, freshwater ecotoxicity at 19,500 pt, and marine eutrophication at 7,950 pt, primarily resulting from fuelwood consumption and untreated wastewater discharge. The proposed mitigation strategies included replacing fuelwood with liquefied petroleum gas and processing wastewater into liquid organic fertilizer. Implementation of these strategies reduced human carcinogenic toxicity to 26,800 pt, representing a 93.85% reduction, freshwater ecotoxicity to 18,900 pt, representing a 3.08% reduction, and marine eutrophication to 7,940 pt. These findings demonstrate that LCA can effectively identify environmental hotspots and guide cleaner production strategies in small-scale tofu industries. The study provides practical implications for improving resource efficiency, wastewater management, and energy use while supporting Sustainable Development Goals 6, 7, 12, and 13.
Co-Authors Ariani, Ismi Khairunnissa Cut Keumala Banaget Dinda Jasmine Hasanah Krisma Nabilla Muhamad Nur Ibnu Luthfi Saud Muhammad Ma'arij Harfadli Riza Hudayarizka Sukma Agustina