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ABSTRAK
Penelitian tentang pembuatan biogas dari sampah organik dan kotoran sapi terhadap pengaruh penambahan trace metal (nikel, cobalt) telah selesai dilakukan. Tujuan dari penelitian ini adalah untuk mengetahui pengaruh penambahan trace metal (nikel, cobalt) terhadap kinerja digester anaerobik dalam perolehan biogas. Penelitian ini dilakukan dengan mencampurkan sampah organik dan kotoran sapi yang diblender menggunakan air dengan perbandingan 1:1:2 (w:w:v) dan dioperasikan di dalam digester berukuran 5L dengan volume isian sebesar 4L secara batch selama 30 hari dengan kondisi pH dijaga konstan 6,5-7,5 pada suhu ruangan 25-30 oC. Variasi yang dilakukan dalam penelitian ini yaitu penambahan nikel sebanyak 0,245 mg/L, penambahan cobalt sebanyak 0,245 mg/L dan kombinasi nikel dan cobalt masing-masing 0,25 mg/L. Adapun parameter yang diamati setiap hari yaitu volume biogas dan suhu, parameter yang dianalisa sekali dalam dua hari yaitu chemical oxygen demand, total suspended solid, volatile suspended solid dan pH. Pada penelitian yang dilakukan diperoleh volume biogas terbesar dengan penambahan cobalt sebesar 85 ml/hari, % reduksi COD sebesar 46,48% , % reduksi TSS sebesar 88,78% dan VSS sebesar 16.540 mg/L.
Kata kunci: biogas, cobalt, kotoran sapi, nikel, sampah organik
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ABSTRACT
The research on biogas production from organic waste and manure to the effect of trace metal (nickel, cobalt) has been done. The objective of this study was to discover the effect of trace metals nickel, cobalt on the performance of biogas anaerobic digester in the acquisition of the raw material organic waste and cow dung. Organic waste and cow dung were blended using water at a ratio of 1:1:2 (w:w:v) and operated in the digester sized 5L with stuffing volume of 4L as batch for 30 days with conditions held constant of pH 6.5-7, 5. This research was conducted with a variety of trace addition of nickel metal as much as 0.245 mg/L, the addition of trace metal cobalt as much as 0.245 mg/L and the combination of nickel and cobalt respectively 0.25 mg/L. As for some of the parameters was observed every day, such as biogas volume and temperature, the parameters are analyzed every 2 days of fermentation such as chemical oxygen demand (COD), total suspended solids (TSS), volatile suspended solids (VSS) and pH. In the study conducted acquired the largest biogas volumes per day with the addition of trace metal cobalt amount of 85 ml, percentage of COD removal by 46,48%, TSS remove percentage obtained was 88,78% and volatile suspended solid as much as 16.540 mg/L.
Keywords: biogas, cobalt, cow dung, nickel, organic waste
