氮缺乏对活性污泥系统的影响  

Influence of nitrogen shortage on activated sludge system

作　　者：于振波[1,2] 彭永臻[1,3] 彭赵旭[1] 柴同志[1] 

机构地区：[1]哈尔滨工业大学城市水资源与水环境国家重点实验室,哈尔滨150090 [2]黑龙江省环境保护科学研究院,哈尔滨150056 [3]北京工业大学环境与能源学院,北京100022

出　　处：《哈尔滨商业大学学报（自然科学版）》2013年第1期27-31,共5页Journal of Harbin University of Commerce：Natural Sciences Edition

基　　金："城市水资源与水环境国家重点实验室"开放基金项目(QAK201006)

摘　　要：为了考察氮缺乏对活性污泥系统的影响,采用5个序批式间歇反应器(SBR),按照缺氧/好氧的方式平行运行,通过调节不同的进水COD∶N比,考察了氮缺乏状态下活性污泥污泥系统的污泥沉降性,脱氮除磷性能,以及出水水质等方面的表现.结果表明在氮缺乏时,活性污泥仍具有较好的沉降性能,并且没有发生污泥膨胀现象.当进水COD∶N比为100∶2时,活性污泥系统仍具有一定的脱氮除磷能力,比释磷量约为14 mg-PO43-—P/g-MLSS,硝化速率约为1.26 mg-O2/g-VSS h-1.当进水COD∶N比高于100/0.75时,活性污泥系统的脱氮除磷性能严重恶化,活性污泥质量浓度在逐渐的下降,MLSS由约2 200 mg/L下降至1 800 mg/L以下,微生物通过自食的方式缓解氮元素的缺乏.In order to study the influence of nitrogen shortage on activated sludge system, 5 sequencing batch reactors （SBR） were operated with an anoxic-oxic pattern in parallel under different degree of nitrogen deficiency. The effects on sludge settleability, nitrogen and phos- phorus removal characteristics , effluent quality were investigated. The results showed that the sludge settled properly under different degree of nitrogen deficiency. The activated sludge sys- tem has certain denitrification and phosphorus removal ability at a influent COD： N value of 100：2 ,and specific phosphorus release amount was about 14 mg- PO43---P/g- MESS and nitrification rate was 1.26 mg - 02/g - VSS h-1. When COD： N 〉 100： 0.75, the denitrifi- cation and phosphorus removal ability of activated sludge system was exacerbated with MISS dropped from nearly 2 200 mg,/L to just under 1 800 mg/L. Microorganism ate itself in order to ease nitrogen shortage.

关 键 词：氮缺乏 SBR 脱氮除磷 污泥沉降性 

分 类 号：X703[环境科学与工程—环境工程]