Lei Z.Wu T.Zhang Y.Liu X.Wan C.Lee D.-J.Tay J.-H.2019-05-142019-05-14201309608524https://scholars.lib.ntu.edu.tw/handle/123456789/408335Soil infiltration treatment (SIT) is ineffective to treat ammonium wastewaters of total nitrogen (TN)>100mgl-1. This study applied a novel two-stage SIT process for effective TN removal from wastewaters of TN>100mgl-1 and of chemical oxygen demand (COD)/TN ratio of 3.2-8.6. The wastewater was first fed into the soil column (stage 1) at hydraulic loading rate (HLR) of 0.06m3m-2d-1 for COD removal and total phosphorus (TP) immobilization. Then the effluent from stage 1 was fed individually into four soil columns (stage 2) at 0.02m3m-2d-1 of HLR with different proportions of raw wastewater as additional carbon source. Over the one-year field test, balanced nitrification and denitrification in the two-stage SIT revealed excellent TN removal (>90%) from the tested wastewaters. © 2012 Elsevier Ltd.Ammonium wastewater; Denitrification; Low COD/TN ratio; Nitrification; Soil infiltration treatment[SDGs]SDG6Ammonium compounds; Chemical oxygen demand; Denitrification; Effluents; Infiltration; Nitrification; Soils; Carbon source; COD removal; Field test; Hydraulic loading rates; Low COD/TN ratio; Nitrification and denitrification; Raw wastewaters; Soil column; Soil infiltration; Total nitrogen; Total phosphorus; Treatment systems; Wastewater treatment; ammonia; nitrogen; organic matter; phosphorus; ammonium; chemical oxygen demand; denitrification; immobilization; infiltration; phosphorus; pollutant removal; sewage treatment; soil column; article; carbon source; chemical oxygen demand; denitrification; hydraulic conductivity; nitrification; priority journal; soil infiltration; soil infiltration treatment; soil property; temperature; waste water managementjournal article10.1016/j.biortech.2012.10.1132-s2.0-84873126323https://www.scopus.com/inward/record.uri?eid=2-s2.0-84873126323&doi=10.1016%2fj.biortech.2012.10.113&partnerID=40&md5=e7e0caf3c74d9f276e8213030e52104f