Study on the change of parameters of food waste CSSTR methane fermentation system during load raising shock

Abstract

Food waste is an environmental problem. It is reported that food waste is a major component of urban solid waste. The amount of methane produced from food waste is higher than that of other substrates in terms of methane fermentation treatment methods. In methane fermentation, parameters are physicochemical and microbiological indicators to predict the state of the bioreactor. In this study, a high organic load shock was applied to a methane fermentation system using food waste as a substrate. By raising the organic load twice (twice as much each time), each parameter was continuously measured and recorded. Parameters include pH, ORP, VFA, arammoni concentration and biogas. Monitoring the parameter period 48h the changes of the parameters over time were observed and the relationship between the parameters was analyzed. Studies have shown that high organic loads increase the yield and rate of production of organic acids and change other parameters. This change has periodic laws and correlations between parameters.