单个农户灰水的生态处理工艺设计与运行

Design and Operation of Ecological Treatment Process of Gray Water from Individual Farmers

设计并构建了一套针对单个农户灰水的生态处理工艺，在水力负荷为0．2m^3／（m^2·d）的工况下，对工艺进出水的COD、TN、NH4＋-N、TP、阴离子表面活性剂（LAs）等指标进行了一年多的连续监测。结果表明，灰水的COD和LAS浓度偏高，分别为（120～480）、（500～600）mg／L；经生态工艺处理后，出水TN、NH4＋ -N和TP浓度能达到《城镇污水处理厂污染物排放标准》（GB18918--2002）的一级A标准，出水COD浓度能达到二级标准，出水LAS浓度可降至120～150mg／L，对LAS、TP、COD、TN、NH4＋-N的平均去除率分别为75％、46％、61％、53％、61％。该工艺构造简单、运行成本低、常年景观性好，具有较好的应用前景。

A set of ecological treatment process of gray water from individual farmers was designed and built. The indexes of COD, TN, NH4＋ - N, TP and LAS in the influent and effluent of the process operated at hydraulic load of 0.2 m3/（ m2·d） were monitored for about one year. The results showed that the concentrations of COD and LAS in the influent were as high as 120 to 480 mg/L and 500 to 600 mg/L respectively. After being treated by the ecological process, the concentrations of TN, NH4 -N and TP in the effluent could meet the first level A criteria specified in the Discharge Standard of Pollutants for Municipal Wastewater Treatment Plant （GB 18918 -2002） , and the concentration of COD in the effluent could meet the secondary criteria. The concentration of LAS in the effluent could be reduced to 120 to 150 mg/L, and the average removal rates of LAS, TP, COD, TN and NH4 - N were 75% , 46% , 61%, 53% and 61% respectively. The process has a good application prospect due to its simple structure, low operation costs and good perennial landscape.