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All Journal Jurnal IPTEK Jurnal Sains & Teknologi Lingkungan Prosiding Seminar Nasional Sains dan Teknologi Terapan Jurnal Teknologi dan Manajemen Environmental Engineering Journal ITATS
Afrianisa, Rodu Dhuha
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Chemical Engineering, Chemistry & Bioengineering Civil Engineering, Building, Construction & Architecture Computer Science & IT Education Engineering Environmental Science Industrial & Manufacturing Engineering Mechanical Engineering Public Health

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Journal : environmental engineering journal itats

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Optimasi Dosis Biokoagulan Biji Pepaya (Carica papaya L.) dalam Penurunan Parameter TSS, BOD, dan COD pada Limbah Tahu Afrianisa, Rodu Dhuha; Yasmine, Yovansyach Arraficha
Environmental Engineering Journal ITATS Vol 5, No 1 (2025): Environmental Engineering Journal ITATS
Publisher : Teknik Lingkungan, Institut Teknologi Adhi Tama Surabaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31284/j.envitats.2025.v5i1.7972

Abstract

The wastewater produced by tofu industries contains high concentrations of organic substances such as proteins, carbohydrates, and fats, which can significantly increase the Biological Oxygen Demand (BOD) and Chemical Oxygen Demand (COD) if not properly treated. Therefore, treatment is required before the water can be discharged into receiving water bodies. This study was conducted using the coagulation–flocculation method, with papaya seed powder used as a natural coagulant. The objective of the research was to determine the optimum dosage of papaya seed bio-coagulant and to evaluate its effectiveness in reducing TSS, BOD, and COD levels under different slow mixing speeds. The dosage variations used in this study were 0.2 g/L, 0.4 g/L, 0.6 g/L, 0.8 g/L, and 1 g/L. The rapid mixing was carried out at 150 rpm for 1 minute, followed by slow mixing at 40 rpm and 30 rpm for 15 minutes, and then sedimentation for 30 minutes. The results showed that the optimum dosage of papaya seed bio-coagulant was 0.4 g/L when using rapid mixing at 150 rpm combined with slow mixing at 40 rpm or 30 rpm. At 150/40 rpm mixing speed, the percentage reductions in TSS, BOD, and COD were 41.15%, 55.94%, and 46.60% respectively. Meanwhile, at 150/30 rpm mixing speed, the reductions were 65%, 61.78%, and 51.78% respectively.
Desain Perencanaan Instalasi Pengolahan Air Limbah Tambak Udang Vaname Intensif di CV X, Desa Campurejo, Panceng, Kabupaten Gresik Anshor, Moh; Afrianisa, Rodu Dhuha; Alfiah, Taty
Environmental Engineering Journal ITATS Vol 6, No 1 (2026): Environmental Engineering Journal ITATS
Publisher : Teknik Lingkungan, Institut Teknologi Adhi Tama Surabaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31284/j.envitats.2026.v6i1.8693

Abstract

Intensive vannamei shrimp (Litopenaeus vannamei) farming produces wastewater with high organic and nutrient loads, which can contaminate surrounding waters without proper treatment. This study designs a Wastewater Treatment Plant (WWTP) for X Firm’s intensive shrimp ponds in Campurejo Village, Panceng District, Gresik Regency, ensuring the effluent meets the quality standards set by the Regulation of the Minister of Marine Affairs and Fisheries No. 28 of 2004. The design process uses laboratory test results of wastewater characteristics and operational analysis of the ponds. The Analytical Hierarchy Process (AHP) method determines treatment alternatives, identifying a combination of anaerobic–aerobic biofilter processes as the most effective based on technical feasibility, pollutant removal efficiency, and land requirements. The proposed WWTP includes an equalization pond, anaerobic biofilter 1, anaerobic biofilter 2, aerobic biofilter, and a final sedimentation pond. It has a treatment capacity of 1,405.7 m³/day, with retention times optimized for each unit. The design requires 534.88 m² of land. Keywords: WWTP, Intensive Vannamei Shrimp Farming, Anaerobic-Aerobic Biofilter, Wastewater, Gresik Regency
Co-Authors Anshor, Moh Ath Thoyib, Muhammad Hafizhni A’yunin, Qurrotu Nampira, Anisa Apriliani pramudia, Fiqo Sholikhah, Mar’atus Talent Nia Pramestyawati Taty Alfiah Yasmine, Yovansyach Arraficha