Influence of temperature on production of lactic acid from kitchen garbage
摘要
The production of lactic acid from kitchen garbage, the precursor for production of biodegradableplastics is described in detail. The influence of temperature on the lactic acid concentration, sugar concentra-tion, and decrement of garbage were evaluated through experiments. Fermentation were carried out in an incu-bator at 5, 25, 37 and 50 ℃. The latic acid produced was maximum at initial pH 6.0 and 37 ℃ , i.e. 38 g/Lwith a yield of 0.23 g/gVS. It is concluded from the experimental results that temperature has quite a consider-able effect on the production of lactic acid; lactic acid concentration increases with temperature until 37 ℃ ,and production rate of lactic acid drops at 50 ℃; the optimal fermentation is 37 ℃. This study shows that pro-duction of lactic acid from kitchen garbage is feasible and reduction of garbage can be realized.