摘要
以双污泥工艺的快速启动为目的,研究了硝化生物膜与反硝化聚磷菌(DPBs)分段先后培养方式的效果。结果表明:经过11 d硝化生物膜培养成功,之后再经12 d的培养DPBs驯化成功。在驯化DPBs的过程中,系统对PO43-P的去除率由22.2%逐渐提高到82.8%;NO3-N在缺氧段的消耗率由74.7%增加到99.0%;系统的总释磷量由0.46 mg/L增加到2.69 mg/L,吸磷量由0.91 mg/L增加到3.95 mg/L;缺氧段进水COD始终维持在50 mg/L以下,促进了DPBs较快成为优势菌属;驯化完成后的污泥具有较好的沉降性能。该培养方式可降低驯化期间缺氧段的有机物含量,削弱其他反硝化菌的竞争,为DPBs提供更适宜的生长环境,因此可缩短DPBs的驯化时间,进而实现工艺的快速启动。
A consequent cultivation of nitrifying bacteria followed by denitritying phosphorus re- moval bacteria （DPBs） was studied to accelerate the startup of two-sludge process. The results show that nitrifying bacteria cultivation is accomplished in l 1 days, and DPBs cultivation is completed in the follow- ing 12 days. During DPBs cultivation, PO4^3- - P removal rate is raised from 22.2% to 82.8%. Corre- sponding NO3^- - N removal in the anoxic stage is improved from 74.7% to 99.0%. The phosphorus re- lease is increased from 0.46 mg/L to 2.69 rag/L, and meanwhile the phosphorus uptake is increased from 0.91 mg/L to 3.95 mg/L. COD is maintained below 50 mg/L in the influent of anoxic stage, which accelerates DPBs to become dominant bacteria. The cultivated sludge has a good setfleability. The cultivation method can achieve quick startup of the process by reducing organic matters in anoxic stage, and consequently providing DPBs, instead of other denitrifying bacteria, with more favorite growth environment.
出处
《中国给水排水》
CAS
CSCD
北大核心
2011年第5期24-27,共4页
China Water & Wastewater
基金
国家水体污染控制与治理科技重大专项(2008ZX07317-02)
深圳市科技计划项目(SG200810130012A)
深圳市南山区科技研发资金资助项目(南科院2008006)
关键词
双污泥工艺
DPBs
培养驯化
快速启动
two-sludge process
denitrifying phosphorus removal bacteria （DPBs）
domesti- cation
quick startup
