Quality of Liquid Fertilizer from Biogas Effluent of POME with The Use of Biogas Sludge Mixed with Beef Feces and POME as An Activator

Abstract

Palm oil production increased sharply in the last few years. Palm oil mill effluent (POME) can disturb environment if discharged untreated. Various technology in the settlement of disposal of farm and POME have been developed, one of them is with exploiting of POME become the biomass and liquid organic fertilizer. The objective of this research was to determine the quality of liquid fertilizer from biogas effluent of POME with the use of biogas sludge mixed with beef feces and POME as an activator. In this research, biogas preparation was done by mixing POME and activators, which were made at different ratios of 90%:10% (P90A10), 80%:20% (P80A20), and 70%:30% (P70A30). The variables observed consist of pH, Organic Carbon (C), Total Nitrogen (N), Phosphor (P), Kalium (K), Mangan (Mn), Ferrum (Fe), and C/N ratio. Data were analyzed using analysis of variance and any significant differences were further tested using Tukey’s test. The results showed that the treatments did not significantly affect (P>0.05) pH, Organic-C, Total-N, P, K, Mn, Fe, and C/N ratio. Moreover, in general the contents in the result is still in accordance with the standards of the Minister of Agriculture No.28/Permentan/ SR.130/5/2009. Biogas effluent of POME with the use of biogas sludge mixed with beef feces and POME as an activator can be used as an organic liquid fertilizer.

Industri kelapa sawit nasional mengalami perkembangan yang pesat. Dampak negatif pada industri kelapa sawit terhadap lingkungan dihasilkannya limbah cair yang biasanya disebut Palm Oil Mill Effluent (POME). Pengolahan POME ini dapat digabungkan dengan pengolahan limbah peternakan. Pengolahan kedua limbah tersebut adalah dengan menjadikan biogas dan pupuk organik. Limbah dari pengolahan secara biogas dapat dimanfaatkan sebagai pupuk organik cair. Penelitian ini bertujuan untuk mengetahui kualitas pupuk cair keluaran biogas dari POME menggunakan sludge biogas campuran kotoran sapi potong dan POME sebagai aktivator. Bahan baku yang digunakan adalah POME dan aktivator berupa sludge biogas campuran kotoran sapi potong dan POME. Perlakuan yang digunakan dalam pembuatan pupuk cair ini yaitu pengolahan POME dengan penambahan aktivator dengan perbandingan 90%:10% (P90A10), 80%:20% (P80A20) dan 70%:30% (P70A30). Rancangan percobaan yang digunakan yaitu Rancangan Acak Lengkap (RAL) dengan tiga kali ulangan. Peubah yang diamati adalah nilai pH, kandungan Karbon (C) organik, Nitrogen (N) total, Phospor (P), Kalium (K), Mangan (Mn), Besi (Fe), dan rasio C/N. Data dianalisis dengan menggunakan analisis ragam (Analysis of Variance, ANOVA) dan jika hasil yang diperoleh berbeda nyata maka dilanjutkan dengan uji Tukey’s.