Anaerobic membrane reactor with phase separation for the treatment of cheese whey

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• 作者：Ahlem Saddoud ; Ilem Hassaï ; ri ; Sami Sayadi
• 关键词：Cheese whey ; Acidogenesis ; Methanogenesis ; Cross-flow microfiltration
• 刊名：Bioresource Technology
• 出版年：2007
• 期刊代码：11_09608524
• 类别：ce
• 出版时间：August 2007
• 卷：98
• 期：11
• 页码：2102-2108
• 文件大小：322 K

摘要

Two-phase anaerobic digestion of cheese whey was investigated in a system consisting of a stirred acidogenic reactor followed by a stirred methanogenic reactor, the latter being coupled to a membrane filtration system to enable removal of soluble effluent whilst retaining solids. The acidogenic reactor was operated at a hydraulic retention time (HRT) of one day, giving maximum acidification of 52.25%with up to 5 g/l volatile fatty acids, of which 63.7%was acetic acid and 24.7%was propionic acid. The methanogenic reactor received an organic load up to 19.78 g COD/l d, corresponding to a HRT of 4 days, at which 79%CODs and 83%BOD₅ removal efficiencies were obtained. Average removals of COD, BOD₅ and TSS in the two-phase anaerobic digestion process were 98.5%, 99%and 100%, respectively. The daily biogas production exceeded 10 times reactor volume and biogas methane content was greater than 70%.