Domestic wastewater treatment with CEPT-wetlands process
by Yaqiang Li, Feng Tang, Qingliang Zhao, Kai Hu
International Journal of Environment and Pollution (IJEP), Vol. 45, No. 1/2/3, 2011

Abstract: This study aimed to develop an effective process with less construction and operation cost and with flexibility of meeting different temperature requirements, namely CEPT-construted wetland processes. To reduce the chemical cost for the CEPT process, fly ash was firstly utilised to develop an efficient compound coagulant. The lab-scale experimental results showed that with low Fly Ash Coagulant (FAC) dosage the removals of COD, Total Phosphorus (TP) and Suspended soild (SS) could achieve more than 62%, 91% and 93%, respectively. The coagulation effluent TP and SS had already met the level IB of the Discharge Standard of Pollutants for Municipal Wastewater Treatment Plant (GB18918-2002). When the effluent was further treated by following wetlands system with a HRT 2–4 d, the COD could be removed up to 65-77% with the final effluent COD less than 64 mg/L.

Online publication date: Wed, 29-Apr-2015

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