Two-stage soil infiltration treatment system for treating ammonium wastewaters of low COD/TN ratios
Journal
Bioresource Technology
Journal Volume
128
Pages
774-778
Date Issued
2013
Author(s)
Abstract
Soil 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.
Subjects
Ammonium wastewater; Denitrification; Low COD/TN ratio; Nitrification; Soil infiltration treatment
SDGs
Other Subjects
Ammonium 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 management
Type
journal article