Produksi Biofertilzer dari Biokonversi Residu Industri Agar Gracilaria sp. Oleh Cryptechodinium Cohnii Dengan Sistem Bioprocess Terintegrasi

Firmansyah, Zulfikar Tegar and Imani, Widhy Rafi (2026) Produksi Biofertilzer dari Biokonversi Residu Industri Agar Gracilaria sp. Oleh Cryptechodinium Cohnii Dengan Sistem Bioprocess Terintegrasi. Other thesis, Institut Teknologi Sepuluh Nopember.

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Abstract

Residu cair industri agar Gracilaria sp. berpotensi dimanfaatkan sebagai bahan baku biofertilizer karena masih mengandung bahan organik dan unsur hara. Penelitian ini bertujuan menganalisis potensi residu Gracilaria sp. sebagai bahan baku biofertilizer, mengevaluasi proses biokonversinya oleh Crypthecodinium cohnii, serta mengkaji pengaruh aplikasinya terhadap pertumbuhan pakcoy dan sifat kimia tanah. Biofertilizer diproduksi melalui fermentasi dan diuji pada tanaman pakcoy dengan perlakuan biofertilizer, pupuk konvensional, dan tanpa pupuk. Hasil penelitian menunjukkan bahwa residu industri agar Gracilaria sp. masih mengandung C-organik sebesar 229 mg/L, sehingga berpotensi dimanfaatkan sebagai substrat fermentasi. Selama fermentasi, pH medium menurun dari kondisi sangat basa menjadi asam, dan fermentasi 14 hari menghasilkan biofertilizer dengan kondisi visual paling stabil. Aplikasi biofertilizer memberikan pertumbuhan pakcoy terbaik dibandingkan pupuk konvensional dan tanpa pupuk. Pada tanah, perlakuan biofertilizer menghasilkan C-organik tertinggi sebesar 2,70% dan rasio C/N sebesar 43, yang menunjukkan peningkatan bahan organik tanah. Dengan demikian, residu industri agar Gracilaria sp. berpotensi dimanfaatkan sebagai biofertilizer untuk mendukung pertumbuhan pakcoy dan memperbaiki sifat kimia tanah.
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Liquid residue from the agar industry based on Gracilaria sp. has potential to be utilized as a raw material for biofertilizer because it still contains organic matter and nutrients. This study aimed to analyze the potential of Gracilaria sp. residue as a biofertilizer substrate, evaluate its bioconversion process by Crypthecodinium cohnii, and assess the effect of its application on pakcoy growth and soil chemical properties. The biofertilizer was produced through fermentation and tested on pakcoy using three treatments: biofertilizer, conventional fertilizer, and no fertilizer.The results showed that the liquid residue of the Gracilaria sp. agar industry still contained organic carbon of 229 mg/L, indicating its potential as a fermentation substrate. During fermentation, the pH of the medium decreased from highly alkaline to acidic conditions, and 14 days of fermentation produced the most visually stable biofertilizer. Biofertilizer application resulted in the best pakcoy growth compared to conventional fertilizer and no fertilizer. In soil, the biofertilizer treatment produced the highest organic C content of 2.70% and a C/N ratio of 43, indicating an increase in soil organic matter. Therefore, Gracilaria sp. agar industry residue has potential to be utilized as a biofertilizer to support pakcoy growth and improve soil chemical properties.

Item Type:	Thesis (Other)
Uncontrolled Keywords:	Biofertilzer, Crypthecodinium cohnii, eco-bioprocess, Gracilaria sp, Pakcoy
Subjects:	T Technology > TP Chemical technology > TP248.27.P55 Plant biotechnology.
Divisions:	Faculty of Vocational > 24305-Industrial Chemical Engineering
Depositing User:	Zulfikar Tegar Firmansyah
Date Deposited:	28 Jul 2026 01:58
Last Modified:	28 Jul 2026 01:58
URI:	http://repository.its.ac.id/id/eprint/138238

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