Anaerobic co-digestion of waste activated sludge and greasy sludge from flotation process: Batch versus CSTR experiments to investigate optimal design

作者：Girault R^*; Bridoux G; Nauleau F; Poullain C; Buffet J; Peu P; Sadowski A G; Beline F

来源：Bioresource Technology, 2012, 105: 1-8.

DOI：10.1016/j.biortech.2011.11.024

• Anaerobic digestion
• Waste activated sludge
• Greasy sludge
• LCFAs
• Inhibition

In this study, the maximum ratio of greasy sludge to incorporate with waste activated sludge was investigated in batch and CSTR experiments. In batch experiments, inhibition occurred with a greasy sludge ratio of more than 20-30% of the feed COD. In CSTR experiments, the optimal greasy sludge ratio was 60% of the feed COD and inhibition occurred above a ratio of 80%. Hence, batch experiments can predict the CSTR yield when the degradation phenomenon are additive but cannot be used to determine the maximum ratio to be used in a CSTR configuration. Additionally, when the ratio of greasy sludge increased from 0% to 60% of the feed COD. CSTR methane production increased by more than 60%. When the greasy sludge ratio increased from 60% to 90% of the feed COD, the reactor yield decreased by 75%.

• 出版日期2012-2