Pengaruh Penambahan MOL Probiotik Terhadap Kualitas Fisik dan Mikrobiologi pada Pembuatan Pupuk Organik Cair Secara Aerobik

Galvin Asyfi’ Rabbani, Ir. Viagian Pastawan, S.Pt., M.sc., Ph.D., IPM.

2026 | Skripsi | ILMU DAN INDUSTRI PETERNAKAN

Pupuk organik cair (POC) merupakan alternatif pemanfaatan limbah ternak untuk mengurangi pencemaran lingkungan sekaligus menghasilkan produk bernilai tambah. Penelitian ini bertujuan mengevaluasi efektivitas mikroorganisme lokal (MOL) Probiotik dalam pengolahan POC serta menganalisis karakteristik fisik dan mikrobiologisnya. Penelitian menggunakan tiga perlakuan, yaitu P0 tanpa starter, P1 dengan starter EM4, dan P2 dengan starter MOL Probiotik berbahan dasar limbah cair rumen. Pengolahan dilakukan secara aerobik selama 30 hari menggunakan aerator. Parameter fisik yang diamati meliputi pH, suhu, warna, dan bau, sedangkan parameter mikrobiologis meliputi Total Plate Count (TPC), total bakteri asam laktat (BAL), total yeast, dan total coliform. Hasil penelitian menunjukkan adanya variasi karakteristik fisik antarperlakuan. Nilai pH awal dan akhir P0, P1, dan P2 masing-masing sebesar 8,50 dan 9,00; 8,67 dan 8,33; serta 9,00 dan 7,83. Suhu akhir berturut-turut sebesar 28,50° C, 27,70° C, dan 28,00° C. Warna akhir P0 agak kecokelatan, P1 cokelat kehitaman, dan P2 cokelat. Aroma akhir P0 masih berbau urin, P1 tidak berbau, dan P2 beraroma asam. Perlakuan P2 menghasilkan nilai rata- rata TPC, BAL, dan yeast tertinggi, masing-masing sebesar 15,2, 9,4, dan 5,7. Namun, ketiganya tidak berbeda nyata dibandingkan P0 dan P1. Total coliform pada seluruh perlakuan tidak terdeteksi. Dengan demikian, MOL Probiotik berpotensi digunakan sebagai alternatif starter komersial dalam pengolahan limbah ternak menjadi POC.

Liquid organic fertilizer (LOF) is an alternative for livestock waste utilization that can help reduce environmental pollution while generating value-added products. This study aimed to evaluate the effectiveness of Probiotic Local Microorganisms (LM) as a starter in LOF production and to analyze the physical and microbiological characteristics of the resulting fertilizer. The study consisted of three treatments: P0, without a starter; P1, with a commercial EM4 starter; and P2, with a Probiotic LM starter derived from rumen liquid waste. The treatment process was conducted aerobically for 30 days using an aerator. Physical parameters included pH, temperature, color, and odor, while microbiological parameters comprised Total Plate Count (TPC), total lactic acid bacteria (LAB), total yeast, and total coliforms. The results showed variations in physical characteristics among treatments. The initial and final pH values for P0, P1, and P2 were 8.50 and 9.00, 8.67 and 8.33, and 9.00 and 7.83, respectively. The final temperatures were 28.50° C, 27.70° C, and 28.00° C, respectively. The final colors were slightly brown for P0, dark brown for P1, and brown for P2. The final odors were urine-like for P0, odorless for P1, and sour for P2. Treatment P2 yielded the highest mean TPC, LAB, and yeast counts, at 15.2, 9.4, and 5.7 respectively. However, these values were not significantly different from those of P0 and P1. Total coliforms were not detected in any treatment. In conclusion, Probiotic LM has the potential to serve as an alternative to commercial starters for converting livestock waste into LOF.

Kata Kunci : EM4, kualitas fisik, kualitas mikrobiologis, mikroorganisme lokal, pupuk organik cair.