作　　者： ; ; ; (褚其英）;

机构地区： 浙江农林大学环境与资源学院

出　　处： 《浙江农林大学学报》 2013年第6期914-920,共7页

摘　　要： 研究水力负荷对生态槽深度处理农村生活污水效果的影响。结果表明:出水溶解氧随水力负荷增大而降低,当水力负荷为52.90 L·d-1·m-2和90.20 L·d-1·m-2时,出水溶解氧在3.00 mg·L-1以上;当水力负荷增至129.40 L·d-1·m-2,溶解氧降至0.60 mg·L-1以下。水力负荷增大不利于化学需氧量的去除,当水力负荷由52.90 L·d-1·m-2增至90.20 L·d-1·m-2,化学需氧量平均去除率降低16.70%。随水力负荷增大,出水氨氮、总氮和总磷均呈上升趋势,水力负荷达129.40 L·d-1·m-2时,出水氨氮和总磷分别升至1.34 mg·L-1和0.11 mg·L-1,仍分别可达GB 3838-2002《地表水环境质量标准》Ⅳ类和Ⅲ类水体标准。但总氮尚难以达到GB 3838-2002之Ⅴ类水标准。 To evaluate the effect of a hydraulic loading rate on an advanced treatment of rural domestic sewage, an eeo-tank consisting of three rectangular tanks（2.0 m × 0.5 m ×0.5 m） was sequentially connected with a floating aquatic plant of either Pistia stratiotes, Hydrocotyle leucocephala, or Myriophyllum aquaticum planted in each. Water samples were collected daily and analyzed for water quality properties including dis- solved oxygen, chemical oxygen demand （COD）, ammonium nitrogen （N）, nitrate-N, nitrite-N, total-N, and total phosphorus（P）. Results showed that effluent dissolved oxygen concentration declined with an increase in hydraulic loading rate. When hydraulic loading rates were 52.90 L .d^-1.m^-2 and 90.20 L.d^-1.m^-2, effluent dissolved oxygen concentration was more than 3.00 mg.L-t. However, as the hydraulic loading rate increased to 129.40 L-d.m^-2, dissolved oxygen dropped below 0.60 mg.L^-1. The increase in hydraulic loading rate did not promote COD removal. When the average hydraulic loading rate increased from 52.90 L.d^-1.m^-2 to 90.20 L-d^-1.m^-2, the average COD removal efficiency dropped 16.70%. Also, effluent concentrations of ammonium-N, total-N, and total P increased with an increase in the hydraulic loading rate. When the hydraulic loading rate was 129.40 L-d-l-m-z, effluent concentrations of ammonium-N national environmental quality standard for surface water, increased to 1.34 mg-Lq meeting the fourth class and total P increased to 0.11 mg＇L-1 meeting the third class standard. However, total-N concentration did not reach the fifth class surface water standard. Thus, the Eco-tank was efficient in removing aqueous pollutants as the hydraulic loading rates varying from 52.90 L-d^-1.m^-2 to 129.40 L.d.m^-2.

关 键 词： 环境生物学 生态槽 生活污水 水力负荷 深度处理 去除率

领　　域： [农业科学] [环境科学与工程]