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- W2089104486 abstract "The disposal of excess sludge from wastewater treatment plants is a serious problem that needs to be addressed. Temperature-phased anaerobic digestion (TPAD) which combines thermophilic and mesophilic processes in one, brings together the advantages of both systems. The aim of the present work was to develop a simple kinetic model to describe the TPAD of sewage sludge in batch completely stirred tank reactors (CSTRs) and to determine the kinetic parameters of both thermophilic and mesophilic stages. A zero-order kinetic equation described the thermophilic step after 2, 4 and 6 days of digestion time (experiment 1, 2 and 3, respectively), yet a first-order equation was found to be adequate to correlate the methane gas accumulated with time in the mesophilic step, the kinetic constant being 0.21 days−1. The methane yield coefficient obtained was found to be almost proportional to the digestion time used in the thermophilic step with values of 0.067, 0.132 and 0.193 L CH4 STP/g VSadded for experiments 1, 2 and 3, respectively. By contrast, the kinetic constant of the mesophilic stage was not influenced by the digestion time used in the thermophilic phase." @default.
- W2089104486 created "2016-06-24" @default.
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- W2089104486 date "2012-01-15" @default.
- W2089104486 modified "2023-09-25" @default.
- W2089104486 title "Modelling of the temperature-phased batch anaerobic digestion of raw sludge from an urban wastewater treatment plant" @default.
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- W2089104486 doi "https://doi.org/10.1080/10934529.2012.640584" @default.
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