Dilution of Biogas Bioactivator to enhance microbial growth

Abstract

The addition of bioactivator to biogas unit is a breakthrough to accelerate and increase the formation of gas. Bioactivator are made from fruit waste that is commonly found in local markets, including bananas, papaya and pineapples. This study aims to find the level of fruit waste dilution to obtain consistency that supports an ideal environment for microbial growth in biogas unit. Fifteen treatments on 15 plastic containers contain fruit waste with a dilution rate of 1, 2 and 3 times with a curing period of 25 days. The parameters were bioactivators colour and smell, pH, and microbial population of bacteria and fungi. The study result was that treatment with dilution rate of 3 times gave better result than other treatments. Bioactivator colour was yellow to orange with tapai/alcohol odour. The pH varies from 3.1 to 4.2. The largest microbial population were as follows bacteria 9.45x107 cfu/ml and fungi 12.32x105 cfu/ml.