滤墙/AF/BAF/复合流人工湿地用于黑臭水体治理

Black-odorous Water Governance by a Combined Process of Fabricated PB,AF,BAF and ICW

以沣西新城新河黑臭水体治理为目标,在控源截污等措施基础上,采用装配式滤墙/AF/BAF/复合流人工湿地组合工艺进行系统治理。经过4个月的运行调试,新河水质已得到明显改善,上游来水COD、BOD_5、TP、NH3-N平均浓度分别为44. 98、9. 39、0. 91、7. 71 mg/L的情况下,出水平均浓度分别降至24. 71、2. 88、0. 35、1. 33 mg/L,DO、透明度由平均2. 3 mg/L、13 cm上升至5. 3 mg/L、40 cm,达到《地表水环境质量标准》(GB 3838—2002)Ⅳ～Ⅴ类水平。该技术在河道修复空间有限、原水可生化性差等污染河流治理中具有参考借鉴价值。

On the basis of source pollution control, a combined process of fabricated permeable barrier （ PB）, anaerobic filter （ AF）, biological aerated filter （BAF） and integrated constructed wetland （ICW） was used for black-odorous water governance of Xinhe River in Fengxi New City. After four months of operation and commission, the river water quality was significantly improved. When the aver- age upstream concentrations of COD, BODs , TP and NH3 - N were 44.98 mg/L, 9.39 mg/L, 0.91 mg/ L and 7.71 mg/L, the average downstream concentrations were reduced to 24.71 mg/L, 2.88 mg/L, 0. 35 mg/L, and 1.33 mg/L, respectively. DO and transparency were increased from 2.3 mg/L, 13 cm to 5.3 mg/L, 40 cm, respectively. They could meet the standard for level Ⅳ-Ⅴ in Environmental Quality Standards for Surface Water （GB 3838 -2002 ）. The effective treatment performance indicated that combined process was suitable for treatment of polluted river with poor biodegradability and limited restoration space inside and outside of river channel.