摘要
针对城市景观湖泊水体因径流污染、大气干湿沉降等因素，水体质量普遍较差的现象，采用曝气生物滤池技术净化水质以控制水体质量。研究了气水比、水力负荷、滤料粒径、滤层高度等工艺参数对净化效果的影响，结果表明，在气水体积比为2：1，水力负荷2m／h，滤料粒径3～5mm，且滤层高度为1．60m时，COD和NH3-N去除率分别达到70．59％和85．82％，出水COD和NH3-N的质量浓度分别稳定在10mg／L和在0．06mg／L左右，达到GB3838-2002地表水III类水质质量标准，可为城市景观水体的水质控制与保育提供技术依据与工艺借鉴。
Several factors, such as pollution of runoff and atmospheric dry and wet deposition, result in the poor quality of landscape water. Biological aerated filter was applied to purify landscape waters. This research focused on the influence of gas-water ratio, hydraulic loading, filter media size, filtering layer section on the purification process. The results showed that the gas-water ratio, hydraulic loading, filter media size was determined as 2：1, 2 m/h and 3 -5 mm respectively at a filter layer height of 1.6 m. Under the optimal technological parameter, the effluent concentrations of COD, NH3-N were averaged at 10 mg/L, 0.06 mg/L, and the removing rate reached 70.59% and 85.82% respectively. The water quality reached the class III of Environmental Quality Standards for Surface Water. The research provides technical basis and technological reference for the quality control and conservation of the urban landscape water.
出处
《水处理技术》
CAS
CSCD
北大核心
2014年第5期83-86,共4页
Technology of Water Treatment
基金
国家科技支撑计划项目(2007BAK27B05)
关键词
曝气生物滤池
景观水体
水质净化
工艺参数
biological aerated filter
landscape water
water purification
technological parameter
