AI Article Synopsis
- The study compared the performance of thermophilic and mesophilic anaerobic sequencing batch reactors (ASBR) in digesting thermo-hydrolyzed sewage sludge, using a 10-day hydraulic retention time (HRT) and a specific TCOD loading rate.
- The average total COD removal rates were 56.20% for thermophilic and 61.66% for mesophilic ASBR, with biogas production rates of 199 mL/g and 219 mL/g, respectively.
- Although the thermophilic ASBR can maintain a high solid retention time (SRT) of 30 days, it exhibited fewer microbial morphologies and lower methane production, leading to less treatment efficiency compared to mesophilic AS
Article Abstract
Parallel laboratory experiments were conducted to investigate the performance of thermophilic and mesophilic anaerobic sequencing batch reactor (ASBR) for the digestion of thermo-hydrolyzed sewage sludge. The average total COD (TCOD) removal rates of thermophilic, mesophilic ASBR at 10-day HRT and 5.42 kg/(m3 x d) TCOD loading rate were 56.20% and 61.66%, and the biogas production rates of TCOD in feeding sludge were 199 and 219 mL/g, respectively. ASBR has the unique capability of maintaining high-solid content and keeping a high solid retention time (SRT). The average SRT of thermophilic, mesophilic ASBR were 30 and 37d, respectively. Compared to mesophilic ASBR, thermophilic ASBR show considerably fewer microbial morphologies and lower methane-production, which might result in a relatively lower treatment efficiency in thermophilic ASBR than that in mesophilic ASBR.
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