Lactic acid recovery from fermentation broth of kitchen garbage by esterification and hydrolysis method
文献类型： 外文期刊
作者： Zhao, Wenjun 1 ; Sun, Xiaohong 3 ; Wang, Qunhui 1 ; Ma, Hongzhi 1 ; Teng, Yun 1 ;
作者机构： 1.Harbin Inst Technol, Dept Environm Sci & Engn, Harbin 150090, Peoples R China
2.Univ Sci & Technol Beijing, Dept Environm Engn, Beijing 100083, Peoples R China
3.Beijing Acad Agr & Forestry Sci, Beijing Agr Biotechnol Ctr, Beijing 100089, Peoples R China
4.Heilongjiang Univ, Dept Civil Engn, Harbin 150086, Peoples R China
关键词： water evaporation;esterification rate;kitchen garbage
期刊名称：BIOMASS & BIOENERGY （ 影响因子：5.061； 五年影响因子：4.815 ）
ISSN：
年卷期：
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收录情况： SCI
摘要： Kitchen garbage was utilized to produce lactic acid (LA) to reduce the corresponding cost. The whole process for pure LA production involved fermentation, esterification and hydrolysis. Kitchen garbage could produce 47.9gL(-1) LA with pH adjusted with ammonia to 6-7. Then the fermentation broth was concentrated by water evaporation, the ammonium lactate inside was esterified with the butanol to produce butyl lactate. Proper catalyst was studied to improve esterification rate, a cation-exchange resin modified by FeCl3 as a catalyst was proved to be effective. The esterification yield of ammonium lactate (NH(4)LA) could reach 96%. Pure LA was hydrolyzed from the obtained butyl lactate in presence of a cation-exchange resin in the H+ form as a catalyst. The catalyst for hydrolysis could be regenerated and reused to save the cost. LA production from the kitchen garbage could not only save cost, but also solve the pollution problems of kitchen garbage. (C) 2008 Elsevier Ltd. All rights reserved.
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