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•The % effluent particulate COD (33–48%) is high due to not accounting carbon oxidation.•In high-rate systems, biodegradable soluble COD in effluent is generally high due to the low SRT and HRT.•The recovered COD is 30–45% which is high due to not accounting carbon oxidation.•The effect of adsorption, bioflocculation and storage in kinetic equations are not considered.•COD recovery can be maximized...
A series of pilot-scale studies were performed to compare conventional high-rate activated sludge systems (HRAS) (continuous stirred tank reactor (CSTR) and plug flow (PF) reactor configurations) with high-rate contact-stabilization (CS) technology in terms of carbon recovery potential from chemically enhanced primary treatment effluent at a municipal wastewater treatment plant. This study showed...
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