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All Journal Jukung (Jurnal Teknik Lingkungan) Jurnal Teknik Industri Terintegrasi (JUTIN) Nusantara Science and Technology Proceedings Envirous AJARCDE (Asian Journal of Applied Research for Community Development and Empowerment) Envirotek : Jurnal Ilmiah Teknik Lingkungan Environmental Engineering Journal ITATS Jurnal Teknologi dan Manajemen Sistem Industri Serambi Engineering
Mirwan, Mohamad
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Journal : Serambi Engineering

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Perbandingan Efektivitas Biji Asam Jawa dan Biji Pepaya Sebagai Biokoagulan untuk Menurunkan BOD, COD, dan TSS pada Air Telaga Rafi, Muhammad Ijlal; Mirwan, Mohamad
Jurnal Serambi Engineering Vol. 10 No. 1 (2025): Januari 2025
Publisher : Faculty of Engineering, Universitas Serambi Mekkah

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Abstract

Telaga Rambit in Gresik Regency, a water source for the local community, is currently polluted by domestic sewage. The coagulation-flocculation process is used to solve this problem. Chemical coagulants are often used in the coagulation-flocculation process, but chemical coagulants often produce sediment that is difficult to handle. Therefore, tamarind and papaya seeds were selected as natural coagulants due to their protein content which can act as polyelectrolytes. The aim of this research is to analyse the effect of pH and coagulant dosage in the coagulation-flocculation process and to compare the effectiveness of tamarind seeds and papaya seeds as biocoagulants in reducing BOD, COD and TSS. From the results of jar test analysis, papaya seed with a dose variation of 4000 mg/L and pH 7 is the best variation as it is able to reduce BOD up to 22.5%, COD 27.4% and TSS 51.22%. While tamarind seed at 2000 mg/L and pH 7 reduced BOD by 18.75%, COD by 23.4% and TSS by 46.3%. The results show that the two biocoagulants did not meet the quality standards in reducing BOD, COD and TSS in the lake water, so another combination process or use of other treatment alternatives is required.
Pengaruh Penambahan Lindi dan Mikroorganisme Lokal (MOL) Rebung Terhadap Proses Pengomposan Sampah Organik Pasar Tradisional , Disnanda Utamifa Jannahdita; Mirwan, Mohamad
Jurnal Serambi Engineering Vol. 10 No. 3 (2025): Juli 2025
Publisher : Faculty of Engineering, Universitas Serambi Mekkah

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Composting is one way of managing organic waste from traditional markets. However, this process takes a long time, so bioactivators are needed to speed up decomposition. Leachate and bamboo shoot MOL (local microorganisms) can serve as bioactivators as they contain the necessary microorganisms and nutrients. This study examines the effect of adding leachate and bamboo shoot MOL to compost organic waste from traditional markets. The composting process used vegetable waste, coconut pulp and sawdust as raw materials, with 1-litre doses of each bioactivator variation. The results showed that the bamboo shoot MOL and the leachate-MOL combination treatments reached standard levels of C, N, P, K and the C/N ratio faster than the control treatment and the leachate-only treatment. The C/N ratios were as follows: control (19.91); leachate (18.15); bamboo shoot MOL (15.41); and leachate-MOL combination (17.73). All of these met the compost quality standard based on SNI 19-7030-2004. Physical changes in the compost occurred faster in the bamboo shoot MOL treatment (day 15) and the combination treatment (day 18) than in the leachate-only treatment (day 21) and the control treatment (day 24). Based on these results, bamboo shoot MOL was proven to be the most effective treatment for accelerating the composting process and improving the quality of the final compost.
The Effect of Additional Composition Substrates on The Rate and Quality of Food Waste Bioconversion by Black Soldier Fly Larvae and Superworm Hakim, Mohammad Najmi Rafi; Mirwan, Mohamad
Jurnal Serambi Engineering Vol. 11 No. 1 (2026): Januari 2026
Publisher : Faculty of Engineering, Universitas Serambi Mekkah

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Food waste has become one of the main problems in environmental management in Indonesia. Food waste that is not managed properly can cause groundwater pollution, greenhouse gas emissions, unpleasant odours, and bacterial breeding grounds, for such examples are tofu pulp and expired bread. This research aims to analyze the effect of additional composition of tofu waste and expired bread substrates on the rate and quality of food waste bioconversion by black soldier fly larvae and superworm. The research method used direct experimentation with variations in substrate composition over 12 days (BSF) and 30 days (Superworms).  The highest Waste Reduction Index (WRI) was achieved by BSF in the treatment with 60% tofu pulp and 40% expired bread (M4) at 7,65. For Superworm, substrate consisting of food waste and tofu pulp (K2) produced the highest reduction percentage of 63,4% and the Waste Reduction Index (WRI) value of 2,11%. for the final weight and best ECD value for BSF larvae were found on variable M5 consisting of food waste, tofu pulp 50%, and expired bread 50%, with a final weight of 0,3 grams per larva and an ECD value of 16,25%. Variable K2 recorded the highest final weight and ECD value for Superworm, with a final weight of 4,15 grams per larva and an ECD value of 2,94%. The characteristics of the bioconversion residue (frass) from both types of larvae meet the C, N, P, K standards in accordance with SNI 19-7030-2004, the results showed that the combination of tofu pulp and expired bread substrates in treatments M4 and K4 produced residues with a more balanced macro nutrient content, making them the most optimal.
Co-Authors , Disnanda Utamifa Jannahdita Anggoro, Cahyo Arkan Syah, Ahmad Naufal Dwitasari, Pritania Ervina, Dea Febrica Fuadi, Muhammad Imam Hakim, Mohammad Najmi Rafi Kusuma, Rian Mei Kusuma Maharani, Regita Merliza, Nabila Nur Nismara, Ghassani Novembrianto, Rizka Pandu Wicaksono Putri, Delia Ayu Arif Putri, Fanny Amelia Rafi, Muhammad Ijlal Rahmansari, Mila Shintya Rizki, Azizah Mahirah Sholikhah, Mar'atus Zakiyayasin Nisa’, Syadzadhiya Qothrunada