Influence of temperature on production of lactic acid from kitchen garbage

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.

作 者： 汪群慧 徐忠 孟令輝 孫曉紅 王旭明   作者單位： 汪群慧,孫曉紅,王旭明(Dept. of Environmental Science and Engineering, Harbin Institute of Technology, Harbin 150090, China)

徐忠(Dept. of Applied Chemistry, Harbin Institute of Technology, Harbin 150001, China;Dept. of Environmental Science and Engineering, Harbin University of Commerce, Harbin 150076, China)

孟令輝(Dept. of Applied Chemistry, Harbin Institute of Technology, Harbin 150001, China) 

刊 名： 哈爾濱工業(yè)大學(xué)學(xué)報(bào)(英文版)  EI 英文刊名： JOURNAL OF HARBIN INSTITUTE OF TECHNOLOGY(NEW SERIES)  年，卷(期)： 2003 10(2)  分類號(hào)： X7  關(guān)鍵詞： lactic acid   garbage treatment   biodegradable plastics   kitchen garbage  

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