TY  -  
T1  - Evaluation of the factors limiting biogas production in full-scale processes and increasing the biogas production efficiency 
SN  -  /  
UR  - http://hdl.handle.net/10138/320218 
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A1  - Kouzi, Afamia; Puranen, Matti; Kontro, Merja H. 
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PB  -  
Y1  - 2020 
LA  - eng 
AB  - Biogas production from sewage sludge volatile solids (VS) by anaerobic digestion slows down towards the end of the process, among inhibitory factors being pH increase upon ammonia accumulation, poorly digestible biomaterials, and high fixed solid (FS) content. The possibility of concentrating the digested sludge VS (41.7-56.6% on a dry weight basis) by surface and bottom layer separation with biogas post-production was studied. Furthermore, the potential to recycle concentrated VS and digested s... 
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KW  - Digested sludge; Post-treatment; Volatile solids; Fixed solids; pH changes; Layer separation; WASTE-ACTIVATED-SLUDGE; SUBSEQUENT ANAEROBIC-DIGESTION; METHANE PRODUCTION; HEAVY-METALS; MICROBIAL PROCESSES; PRETREATMENT; PH; DISINTEGRATION; ENHANCEMENT; HYDROLYSIS; 1172 Environmental sciences 
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ER  -