%0 Journal Article
%T Effect of in-stream electron acceptor on phosphorous release behaviour of excess activated sludge<br>内源电子受体对剩余污泥释磷行为的影响
%A Li Linhui
%A Yang Yongzhe
%A Sun Hongfang
%A Zhou Ru
%A Cheng Yinsheng
%A Li Wei
%A Wang Li
%A <br>李林辉
%A 杨永哲
%A 孙红芳
%A 周茹
%A 程崟生
%A 李维
%A 王莉
%J 环境工程学报
%D 2012
%I 
%X In this study,a novel in-stream electron acceptor,which generated from the reject water treatment 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 electron acceptor(i.e.nitrate) generation is 24 h which can lead to the ammoniumcal-N in the reject water decreased 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 indicates 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.
%K in-stream electron acceptor
%K gravity thickening
%K P release
%K P-feedback
%K reject water treatment<br>内源电子受体
%K 重力浓缩
%K 磷释放
%K 磷积累
%K 生产废水处理
%U http://www.alljournals.cn/get_abstract_url.aspx?pcid=3FF3ABA7486768130C3FF830376F43B398E0C97F0FF2DD53&cid=92E6F4267FD4CBCB51B1E49E014D8054&jid=3567BD61129AA59043F5DE01F8815DB5&aid=804D8F4691AB7856F7D4015987581A3A&yid=99E9153A83D4CB11&vid=B31275AF3241DB2D&iid=DF92D298D3FF1E6E&sid=E5322D16BA846136&eid=D4A949C86EFF77E3&journal_id=1673-9108&journal_name=环境工程学报&referenced_num=0&reference_num=0