三格厌氧池-垂直流人工湿地处理农村灰水

采用三格厌氧池-垂直流人工湿地对长沙县农村灰水进行试验研究，考察该组合工艺处理低浓度生活灰水的可行性及污染物的去除效能。从2011年11月22日—2012年6月9日，连续运行192 d，结果表明，当进水COD_Cr、NH₄⁺-N、TN和TP浓度分别为283~684、3.2~19.5、13.2~37.4和1.2~6.3 mg/L，三格厌氧池的水力停留时间（HRT）为75 h，垂直流人工湿地的HRT为30 h时，系统对COD_Cr、NH₄⁺-N、TN和TP的平均去除率分别为88.9%、73.9%、69.8%和73.9%，出水浓度平均值分别为52、2.1、5.1和0.7 mg/L，均满足GB 18918—2002《城镇污水处理厂污染物排放标准》一级B标准。

Study of Combined Three-chamber Anaerobic Reactor and Vertical Subsurface Flow Constructed Wetland Process for Rural Grey Wastewater Treatment

The combined three-chamber anaerobic reactor and vertical subsurface flow constructed wetland process was adopted for the treatment of the Changsha County rural dispersed grey wastewater to investigate the feasibility and the removal efficiency. From November 22, 2011 to June 9, 2012, the continuous 192 days operation results showed as follows. When the influent CODCr, NH4+-N, TN and TP concentration was 283-684, 3.2-19.5, 13.2-37.4 and 1.2-6.3 mg/L, respectively, the CODCr, NH4+-N, TN and TP average removal efficiency was 88.9%, 73.9%, 69.8% and 73.9% accordingly under the operation conditions of the anaerobic reactor 75 h HRT and the vertical constructed wetland 30 h HRT. The effluent average concentration of the four indexes was 52, 2.1, 5.1 and 0.7 mg/L, respectively, which could meet the Ⅰ-class B criteria specified in the Discharge Standard of Pollutants for Municipal Wastewater Treatment Plant (GB 18918-2002).