title: Investigation of a sewage-integrated technology combining an expanded granular sludge bed (EGSB) and an electrochemical reactor in a pilot-scale plant.
abstract: A sewage-integrated treatment system (SITS) for the treatment of municipal wastewater, consisting of an expanded granular sludge bed (EGSB) reactor to remove soluble organic matter and an electrochemical (EC) reactor to oxidize the NH(3)-N, was evaluated. The performance of the EGSB reactor was monitored for 12 months in a pilot-scale plant. Iron shavings were added to the EGSB reactor on the sixtieth day to improve the removal efficiency of the chemical oxygen demand (COD), suspended solids (SS) and total phosphorus (TP). After the iron shavings were added, the effluent COD, SS and TP decreased from 104 to 46 mg L(-1), 21 to 8.6 mg L(-1) and 3.62 to 1.36 mg L(-1), respectively. Moreover, in the EC reactor, which was equipped with IrO(2)/Ti anodes, the NH(3)-N and total nitrogen (TN) concentrations decreased from 25 to 12 mg L(-1) and 29 to 15 mg L(-1), respectively. The NH(3)-N was directly oxidized to N(2), resulting in no secondary pollution. The results demonstrated the possibility of removing carbon and nutrients in a SITS with high efficiency. The system runs efficiently and with a flexible operation, making it suitable for low-strength wastewater. The results and parameters presented here can provide references for the practical project.
authors: Department of Environmental Science and Engineering, Fudan University, Shanghai 200433, PR China.
authors: Ruihua
authors: R
authors: Dai
authors: Yan
authors: Y
authors: Liu
authors: Xiang
authors: X
authors: Liu
authors: Xudong
authors: X
authors: Zhang
authors: Ciyuan
authors: C
authors: Zeng
authors: Liang
authors: L
authors: Li
mesh_terms: D019149:Bioreactors; D002621:Chemistry / Q000379:methods; D002625:Chemistry, Organic / Q000379:methods; D004563:Electrochemistry / Q000379:methods*; D004867:Equipment Design; D008956:Models, Chemical; D009584:Nitrogen / Q000737:chemistry; D010100:Oxygen / Q000737:chemistry; D012722:Sewage; D013997:Time Factors; D014865:Waste Disposal, Fluid / Q000379:methods*; D014867:Water / Q000737:chemistry; D014874:Water Pollutants, Chemical / Q000032:analysis; D018508:Water Purification / Q000379:methods
chemical_list: D012722:Sewage; D014874:Water Pollutants, Chemical; D014867:Water; D009584:Nitrogen; D010100:Oxygen