摘要
通过小试实验和污水处理厂(SBR工艺)的现场实验研究了投加聚合氯化铝(PAC)对生物脱氮除磷的影响。结果显示,铝盐对生物释磷和吸磷过程有显著的影响,硝化过程中铝盐主要对氨氧化细菌(AOB)产生短时影响。小剂量PAC对生物硝化作用影响较小,投加量大于100 mg/L时硝化作用几乎完全消失。但加药一段时间后硝化作用恢复到正常水平。化学药剂在活性污泥中的积累会产生持续的影响,因此化学辅助除磷时推荐采用间歇加药方式,11 d为一个周期,其中7 d投加PAC,4天停止投加药剂。
A laboratory-scale and a full-scale study on the influence of PAC on biological phosphorus and nitrogen removal of SBR were carried out.Results indicated that the inhibition of PAC on anaerobic biological phosphorus release and aerobic biological phosphorus uptake processes was significant. Meanwhile the obviously inhibition of PAC on Ammonia-Oxidizing Bacteria（AOB） was also observed in the nitrification process. The inhibition of PAC on nitrification process was unobvious under small dosage but the nitrification process almost disappeared when the dosage was more than 100 mg/L. However nitrification process recovered after a period of time. Since the inhibition persisted after the addition of PAC and its accumulation, intermittent dosing is recommended for simultaneous chemical phosphorus removal. An 11-day PAC addition cycle is suggested which consisted 7-day dosing and 4-day cessation of dosing.
出处
《水处理技术》
CAS
CSCD
北大核心
2016年第6期59-63,共5页
Technology of Water Treatment
基金
山西省回国留学人员科研资助项目(2014-02)
山西省人社厅留学回国人员科技活动择优资助项目(2014-95)
太原理工大学校基金资助项目(900103-03020775)
太原市住房和城乡建设委员会基金项目(201201)
关键词
PAC
辅助除磷
硝化作用
抑制作用
PAC
simultaneous chemical phosphorus removal
nitrification
inhibition
