摘要
以生活污水为处理对象,通过室温下的50 d连续运行试验,考察厌氧/缺氧过程耦合曝气生物滤池的双污泥反硝化除磷系统（AA-BAF）的除污染物效能以及运行稳定性。研究结果表明：AA-BAF系统对COD、氨氮和TN具有很好的去除效果,而除磷性能在后期出现恶化。试验期间COD、氨氮和TN的平均去除率分别为87%,99%和79%;试验初期（1-30 d）PO4^3--P的去除率约为80%,之后迅速降低至试验末的40%以下。进水中的大部分可利用的COD在AA反应器中得到了有效利用,并且BAF出水回流液中的NO3^--N在缺氧区内被完全去除。AA反应器出水COD和NO3^--N平均质量浓度分别为50 mg/L和0.3 mg/L。当AA反应器出水中NO3^--N质量浓度小于0.3 mg/L时,出水PO4^3--P质量浓度大于0.5 mg/L。完全依靠反硝化除磷的AA-BAF连续流系统处理实际生活污水时,不仅不能保证磷的达标排放,而且不能稳定运行。
A two-sludge system integrated anaerobic/anoxic process with biological aerated filter（AA-BAF） was used to treat real domestic wastewater. To evaluate nutrients removal performance and operational stability, AA-BAF system was operated at room temperature for 50 d continuously. The results show that as high as 87% COD, 99% NH4^＋-N and 79%TN are removed successfully throughout the experiment. While the obvious deterioration of phosphate removal is observed, decreasing from approximately 80%（1-30 d） to less than 40%. All soluble influent COD is completely consumed in AA reactor for nutrients removal. NO3^--N in nitrified liquor from BAF recycled to the anoxic zone is wholly removed. The mean effluent COD and NO3^--N are as low as 50 mg/L and 0.3 mg/L respectively. Moreover, when NO3^--N concentrations in AA effluent is less than 0.3 mg/L, the effluent PO4^3--P concentration is above the limit value of 0.5 mg/L. Totally through denitrifying phosphate removal pathway, AA-BAF continuous denitrifying phosphorous removal system treating domestic wastewater can not ensure long term stable operation and efficient phosphate removal.
出处
《中南大学学报（自然科学版）》
EI
CAS
CSCD
北大核心
2014年第11期4087-4092,共6页
Journal of Central South University:Science and Technology
基金
国家高技术研究发展计划("863"计划)项目(2012AA063406)
北京市教委科技创新平台项目(2014)~~
关键词
反硝化除磷
双污泥系统
污泥沉降性
生活污水
denitrifying phosphorous removal
two-sludge system
sludge settleability
domestic wastewater
