摘要
采用新型深层床人工湿地（NDB-CWs）处理校园生活污水,以砾石、沸石和红砖屑作为人工湿地填料,水力负荷0.47 m3/（m2·d）下,研究对COD、NH4＋-N、TN及TP的去除特征及水温对其处理性能的影响。结果表明,在运行阶段出水COD和NH4＋-N、TN、PO43--P、TP的质量浓度分别平均为34.49 mg/L和0.88、42.39、0.40、0.43 mg/L,平均去除率分别为84.41%、98.57%、38.33%、86.68%及90.60%;水温由14.5℃升高至31℃时,对COD、NH4＋-N及TP的去除率变化不大,对TN去除率影响较大;沸石对磷的去除效果优于砾石,以沸石为填料的第3级人工湿地、以砾石为填料的第1级人工湿地对磷的累计吸附量分别为206.0、179.0 g/m3。NDB-CWs处理1 m3的污水所需的占地面积是常规人工湿地的8.5%～32.7%。
The novel deep bed constructed wetlands （NDB-CWs） that used gravel, zeolite, and red brick as the substance was employed for treatment of university campus sewage. Hydraulic load rate of NDB-CWs was 0.47 m3/（m2·d）. Removal characteristics of COD and NH4＋-N, TN, TP of NDB-CWs on demostic wastewater of university campus was investigated. Impact of wastewater temperature on the removal of each pollutant was analyzed. The results showed that, the average effluent COD and mass concentration of NH4＋-N, TN, PO43-P, TP in the operation period were 34.49 and 0.88, 42.39, 0.40, 0.43 mg/L, respectively. The average removal rate were 84.41%, 98.57%, 38.33%, 86.68% and 90.60%, respectively. When wastewater temperature raised from 14.5 ℃ to 31 ℃, the removal efficiency of COD, NH4＋-N and TP was not so significant. But for TN was significant. The phosphorus removal efficiency of zeolite was superior to that of gravel. In the third stage constructed wetland with zeolite as substance, the accumulative adsorption quantity of phosphorus was 206.0 g/m3. That was 179.0 g/m3 in the first stage constructed wetland with gravel as substance. The aera reequired for NDB-CWs processing 1 m3 sewage was 8.5%～32.7% of traditional constructed wetland.
出处
《水处理技术》
CAS
CSCD
北大核心
2015年第8期107-111,共5页
Technology of Water Treatment
基金
国家水体污染控制与治理科技重大专项(2009ZX07212-002-004-003)
高等学校博士学科点专项科研基金(20116120110008)
关键词
深层床人工湿地
潮汐流
生活污水
脱氮
除磷
deep bed wetland
tidal flow
demostic wastewater
nitrogen removal
phosphorus removal
