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All Journal Jukung (Jurnal Teknik Lingkungan) 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.
Co-Authors , Disnanda Utamifa Jannahdita Arkan Syah, Ahmad Naufal Dwitasari, Pritania Ervina, Dea Febrica Fuadi, Muhammad Imam Kusuma, Rian Mei Kusuma Maharani, Regita Merliza, Nabila Nur Nismara, Ghassani Novembrianto, Rizka Pandu Wicaksono Putri, Delia Ayu Arif Rafi, Muhammad Ijlal Rahmansari, Mila Shintya Rizki, Azizah Mahirah Sholikhah, Mar'atus Zakiyayasin Nisa’, Syadzadhiya Qothrunada