ELECTRO-COAGULATION-FLOCCULATION FOR WATER REUSE

摘要: Wastewater treatment processes complying with stringent reuse standards are of growing need. This paper examines i) electrocoagulation/flocculation (ECF) coupled with ultrafiltration (UF) for organic removal and flux enhancement and, ii) Phosphorus (P) removal from secondary effluent with granular filtration (GF) and constructed wetland (CW). Bench-scale and field experiments of ECF-UF combinations as well as a hybrid system of pilot scale ECF-GF-CW tests had been performed. ECF removed humics and reduced fouling. Field pilot results showed up to 97% of total P removal, 53% TOC reduction and most of the TSS removal. The performance of the hybrid system is explained by the combined flocculation and adsorption mechanisms produced by the ECF with transport, attachment and biodegradation mechanisms in the CW beds.