桂林乌金河黑臭水体河道末端砾间接触氧化和人工快滤联合治理技术研究

Study on Treatment of Black and Odorous Water inWujin River of Guilin by Contact Oxidation Between Gravels and Artificial Rapid Filtration

桂林乌金河黑臭水体水量和水质调查分析表明,调查河段枯水期为8000 m^3/d,丰水期为30000 m^3/d,化学需氧量(COD)在12.9 mg/L^81.7 mg/L,氨氮(NH3-N)在4.2 mg/L^23.5 mg/L,砾间接触氧化实验表明,对进水COD为50.1 mg/L^81.9 mg/L,NH3-N在21.4 mg/L^28.5mg/L条件下,COD可去除80%左右,NH3-N可去除86%左右。人工快滤实验也表明,对进水COD为116 mg/L^356 mg/L,NH3-N在32.7 mg/L^114.5 mg/L条件下,COD可去除80%左右,NH3-N可去除80.7%左右。运用砾间接触氧化和人工快滤在乌金河末端进行联合治理,出水可达《城镇污水处理厂污染物排放标准》(GB 18918-2002)一级B标准。

According to the investigation and analysis of water quantity and quality of and odorous water in Wujin River of Guilin,it is 8000 m^3/d in dry season,30000 m^3/d in wet season,COD is 12.9 mg/L^81.7 mg/L,NH3-N is 4.2 mg/L^23.5 mg/L.The experiment of contact oxidation between gravel shows that under the condition of influent COD of 50.1 mg/L^81.9mg/L and NH3-N of 21.4 mg/L^28.5 mg/L,COD and NH3-N can be removed about 80%and 86%.The artificial fast filtration experiment also showed that when the influent COD is 116 mg/L^356 mg/L and NH3-N is 32.7 mg/L^114.5 mg/L,the COD and NH3-N could be removed about 80%and 80.7%.The combined treatment of contact oxidation between gravels and artificial rapid filtration at the end ofWujin River shows that the effluent can meet the first class B standard of"Discharge Standard of Pollutants for Municipal Wastewater Treatment Plant"(GB 18918-2002).