Prefermentation is the production of soluble organics such as volatile fatty acids by subjecting municipal wastewater to anaerobic conditions for a period of time. The full-scale prefermentation of primary sludge was implemented successfully at South African WWTP's in the early 1980s as a primary treatment process to enhance nutrient removal in activated sludge processes.

It is hereby explicitly acknowledged that the following text is based on publications by Rössle [2,3] and Münch [1].



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Herkomst: Stowa Selected Technologies: fact sheets
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