摘要
通过在混合陶粒滤池的土壤中引入蚯蚓,构建蚯蚓生态滤池,利用蚯蚓的挖掘作用、进食和蚓粪克服传统土地处理易堵塞、效率低等缺陷。采用该工艺处理农村生活污水,研究了季节、水力负荷、蚯蚓密度、填料组合对污水处理效果的影响。结果表明,在水力负荷为1 m/d、蚯蚓密度为12 g/L、填料组合为陶粒∶土壤=3∶1的条件下,对农村生活污水的处理效果较好,对氨氮、COD的平均去除率分别达到62.51%、57.32%,蚯蚓的添加提高了滤池的抗低温能力,出水水质可满足《农田灌溉水质标准》(GB 5084—2005)。
Earthworms were introduced in the mixture of ceramsite and soil to build a vermifilter for treatment of rural domestic sewage. The earthworm digging action, eating and vermicompost were uti- lized to overcome the disadvantages of the traditional land process, such as the filter clogging, low treat- ment efficiency and so on. The influences of different seasons, hydraulic loading, earthworm density and different filtering materials on sewage treatment efficiency were investigated. The results showed that when the hydraulic loading was 1 m/d, earthworm density was 12 g/L, and the filtering materials were ceram- site to soil at a ratio of 3 ： 1, the treatment efficiency of domestic sewage was good, and the average rmoval rates of NH3 -N and COD reached 62.51% and 57.32% respectively. Adding earthworms could improve the filter resistance to low temperature, and the effluent quality could meet the requirements in the Standards for Irrigation Water Quality （ GB 5084 - 2005 ）.
出处
《中国给水排水》
CAS
CSCD
北大核心
2016年第11期16-19,共4页
China Water & Wastewater
基金
国家水体污染控制与治理科技重大专项(2013ZX07312-001)
关键词
蚯蚓生态滤池
农村生活污水
填料
除污效果
vermifiher
rural domestic sewage
filtering material
pollutant removal efficiency
