环境工程学报2012，Vol.6Issue(7)：2276-2280,5.
内源电子受体对剩余污泥释磷行为的影响
Effect of in-stream electron acceptor on phosphorous release behaviour of excess activated sludge
摘要
Abstract
In this study, a novel in-stream electron acceptor, which generated from the reject water treat- ment process using excess activated sludge of the biological nitrogen （N） and phosphorous （P） removal process as nitrobacter, was used to control P-release from the P-enriched excess activated sludge （EAS） during gravity thickening process. The objectives of this study were （ 1 ） to determine the optimal nitrification time for in-stream electron acceptor （ i. e. nitrate） generation from the reject water treatment system using EAS as nitrifying bacteria and （2） to investigate the P-release characteristics of EAS during the gravity thickening process using in-stream electron acceptor as inhibitor. Experimental results showed that the optimal nitrification time for in-stream elec- tron acceptor （i. e. nitrate） generation is 24 h which can lead to the ammoniumcal-N in the reject water de- creased from 41.20 mg/L to 0. 19 mg/L while the nitrate increased from 1.14 mg/L to 32.62 mg/L. This indi- cates that the nitrate, an in-stream electron, was generated and can potentially be used as inhibitor to reduce the amount P-release from EAS during the gravity thickening process. The results showed that the phosphorus in the reject water was changed to 44. 87 mg/L when the in-stream electron was 36. 16 mg/L. This results in 65.44% of P-feedback through reject water recycling decreased. Meanwhile, the in-stream nitrate decreased from 36.16 mg/L to 4.84 mg/L. The amount of ammoniumcal-N feedback through reject water recycling decreased from 100% to 17.68%. This indicates that significant amount of P and N feedback in the biological N and P removal process can be reduced using the in-stream electron acceptor.关键词
内源电子受体/重力浓缩/磷释放/磷积累/生产废水处理Key words
in-stream electron acceptor/gravity thickening/P release/P-feedback/reject water treatment分类
资源环境引用本文复制引用
李林辉,杨永哲,孙红芳,周茹,程签生,李维,王莉..内源电子受体对剩余污泥释磷行为的影响[J].环境工程学报,2012,6(7):2276-2280,5.基金项目
教育部留学回国人员科研项目 （）
陕西省高校省级重点实验室重点科研项目 （）
