摘要
针对农村生活污水的水质、水量和间歇排放特点,开发了"厌氧—局部循环供氧生物膜"技术,并考察了其对农村生活污水的脱氮能力。该工艺的厌氧池和局部循环供氧池有效容积比为1∶1.6,曝气装置位于局部循环供氧池中间底部,环形导流板将其分隔成中间好氧区和四周缺氧区,斜管沉淀池被前置于厌氧池与局部循环供氧池之间,出水端设置循环水池。装置连续运行12个月,平均进水量为140 L/d,生物反应区的HRT为1.3 d,出水BOD5、TN、NH3-N、NO3--N平均浓度分别为3.38、11.98、2.69、7.03 mg/L,NO3--N、NH3-N分别占到TN的58.7%、22.4%,出水水质达到了GB 18918—2002中的一级A排放标准。说明该技术对农村生活污水具有较好的处理效果,系统的硝化作用非常强,但反硝化作用受到碳源不足的制约。
Based on the quality, quantity and intermittent discharge of rural domestic sewage, ananaerobic and local circulating oxygen-supply biofilm technology was developed and tested for its nitrogen removal performance. The available volume ratio between the anaerobic tank and the local circulating oxygen-supply tank was 1 ： 1.6. An aeration device was located at the bottom center of the local circulating oxygen-supply tank, which was separated by an annular splitter plate to a central aerobic zone and a peripheral anoxic zone. The inclined-tube sedimentation tank was situated between the anaerobic tank and the local circulating oxygen-supply tank. There was a water circulation tank near the effluent outlet. This system ran continuously for twelve months. The average influent was 140 L/d, and the hydraulic retention time in bio-reaction zone was 1.3 d. The average effluent concentrations of BOD5, TN, NH3 - N and NO3^-N were 3.38 mg/L, 11.98 mg/L, 2.69 mg/L and 7.03 mg/L, respectively. NH3 - N and NO3^-N were 58.7% and 22.4% of TN. The effluent quality met the first class criteria specified in the Discharge Standard of Pollutants for Municipal Wastewater Treatment Plant （ GB 18918 - 2002 ）. The ni- trification of the system was strong, but denitrification was restricted bv carbon source shortage
出处
《中国给水排水》
CAS
CSCD
北大核心
2013年第5期15-18,共4页
China Water & Wastewater
基金
国家科技部农转资金资助项目(2011GB2A100007)
天津市农业科技成果转化项目(201101037)
关键词
农村生活污水
间歇进水
水解酸化
局部循环供氧
生物膜
脱氮
rural domestic sewage
intermittent feeding
hydrolysis-acidification
local cireulating oxygen-supply
biofilm
nitrogen removal
