摘要
为解决脱氮除磷对碳源的竞争及不同泥龄需要等问题,提出强化序批式生物膜反应器(SBBR)脱氮与人工湿地除磷联合工艺。通过将SBBR系统分为2格,并采用交替运行的方式(进水和曝气),强化了碳源保存,进一步提高脱氮效率;SBBR系统出水进入栽种菖蒲(Acorus calamus L.)的人工湿地,利用基质和植物吸附等作用进一步除磷。结果表明:(1)2格交替运行SBBR脱氮效果良好,稳定时出水COD均值为34mg/L,去除率约为93%;出水NH4+-N均值为2.0mg/L,去除率约为94%;出水TN维持在4.5mg/L左右,去除率约为86%;出水TP在2mg/L附近波动,除磷效果并不理想,有时还会出现出水TP高于进水TP的释磷现象。(2)人工湿地除磷效果良好且稳定。当进水TP为0.6～6.7mg/L时,出水TP维持在0.3～0.7mg/L。(3)该联合工艺有良好的脱氮除磷效果。系统出水NH4+-N、TN、TP均值分别为2.0、2.4、0.5mg/L,去除率均值分别为94%、92%、90%。
The characteristics of nitrogen and phosphorus removal were studied in a lab-scale combined process with enhanced sequencing biofilm batch reactor （SBBR） for nitrogen removal and constructed wetlands for phosphorus removal.The goals of the modified SBBR process were to make full use of carbon source and to solve problems exist in the simultaneous nitrogen and phosphorus removal,such as the competition on carbon source and different sludge retention time.This modified SBBR operated alternately in two similar parts of the reactor to enhance the storage of carbon and to improve the efficiency of simultaneous nitrification and denitrification （SND）.Constructed wetlands were used for further P removal.The results indicated that 86% of TN was removed in the modified SBBR with the effluent TN was 4.5 mg/L;when the influent TP loading of the wetland ranged 0.6-6.7 mg/L,the concentration of TP in effluent was 0.3-0.7 mg/L.The established combined process achieved a good result for N and P removal;the average concentrations of NH＋4-N,TN and TP in effluent were 2.0,2.4,0.5 mg/L,corresponding to the removal rates of 94%,92% and 90%,respectively.
出处
《环境污染与防治》
CAS
CSCD
北大核心
2010年第9期64-67,共4页
Environmental Pollution & Control
关键词
脱氮除磷
序批式生物膜反应器
储碳
人工湿地
nitrogen and phosphorus removal
SBBR
carbon storage
constructed wetlands
