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Articles 31 - 31 of 31
Full-Text Articles in Environmental Engineering
Comparative Assessment Of Single-Stage And Two-Stage Anaerobic Digestion For The Treatment Of Thin Stillage, Noha Nasr, Elsayed Elbeshbishy, Hisham Hafez, George Nakhla, M. Hesham El Naggar
Comparative Assessment Of Single-Stage And Two-Stage Anaerobic Digestion For The Treatment Of Thin Stillage, Noha Nasr, Elsayed Elbeshbishy, Hisham Hafez, George Nakhla, M. Hesham El Naggar
Noha El-Sayed Nasr
A comparative evaluation of single-stage and two-stage anaerobic digestion processes for biomethane and biohydrogen production using thin stillage was performed to assess the impact of separating the acidogenic and methanogenic stages on anaerobic digestion. Thin stillage, the main by-product from ethanol production, was characterized by high total chemical oxygen demand (TCOD) of 122 g/L and total volatile fatty acids (TVFAs) of 12 g/L. A maximum methane yield of 0.33 L CH4/gCODadded (STP) was achieved in the two-stage process while a single-stage process achieved a maximum yield of only 0.26 L CH4/gCODadded (STP). The separation of acidification stage increased the TVFAs …