反硝化除磷工艺中二次曝气作用分析

Analysis of Secondary Aeration's Effect on Denitrifying Dephosphatation Process

反硝化除磷工艺是根据反硝化除磷菌开发的新工艺,结合试验重点探讨了二次曝气在该工艺中的作用:吹脱反硝化产生的附着于活性污泥上的氮气;缺氧段硝酸盐不足时提供O2作为二级电子受体使DPB污泥充分吸磷;ρ(COD)/ρ(N),ρ(COD)/ρ(P)比值偏高时,再生活性污泥。指出二次曝气在反硝化除磷工艺中具有重要作用。

The denitrifying dephosphatation process was a new process developed based on the theory of denitrifying phosphorus removing bacteria （DPB） and the secondary aeration＇s effect on the process was analyzed. The secondary aeration could remove the N2 cling to the activated sludge and offer oxygen as the secondary electron acceptor when the NO3^--O was not enough in the anoxic process. When the ratio of COD/N and COD/P was high, the secondary aeration could also renew the activated sludge. Consequently,the secondary aeration was considered to have an big effect on the denitrifying dephosphatation process.