Effects of Pretreatments and Different Types of Microbial Starter on Biogas Production from Food Waste
Tina Mulya Gantina(a*), Conny K Wachjoe(a), Sri Wuryanti(a) and Annisa Syafitri K(a)
a) Energy Conversion Engineering - Politeknik Negeri Bandung
Jl. Gegerkalong Hilir, Ciwaruga, Bandung 40012, Indonesia
*tina.gantina[at]polban.ac.id
Abstract
The problem with the slow process of anaerobic biodegradation, especially in food waste, is that the rate of biogas production cannot keep up with high demands for fuel on the market. Several studies have been carried out to optimize the rate of biogas formation, including the addition of a microbial starters and pretreatments. The objective is to examine the production and characteristics of biogas with raw material for food waste (vegetable market waste) plus EM4 and GP-7 microbial starter, using batch biodigester system. The specific target of this research is to determine the performance of biogas manufacturing process by a combination of two techniques, the pre-treatments of raw vegetable waste and microbial starters. The research methods used consist of the design and manufacture of batch system biodigesters, determination of raw material characteristics, preparation of raw materials by pretreatment (enumeration and immersion in 3% NaOH solution) and addition of starters, namely EM4 and GP-7. By combining the two techniques, biogas production with greater volumes and concentrations of methane gas can be obtained in a relatively short period to catch up with market demands.
Keywords: food waste, anaerobic degradation, biogas production rate
Topic: Chemical Engineering