铁盐应用于污水协同除磷研究进展  

Research Progress on Phosphorus Synergetic Removal by Ferric Salt in Wastewater

作　　者：季斌[1] 秦慧 陈威[1] 樊杰[1] 宋宏娇[1] 

机构地区：[1]武汉科技大学城市建设学院,湖北武汉430065

出　　处：《水处理技术》2018年第2期11-14,共4页Technology of Water Treatment

基　　金：湖北省自然科学基金项目(2017CFB350);湖北省教育厅中青年人才项目(Q20161116);武汉科技大学青年人才项目(2016xz033)

摘　　要：强化污水中磷的去除是污水厂提标升级必须解决的问题之一,而铁盐是协同除磷常用的药剂之一。从铁盐投加对污水生物处理系统处理效能、污泥性能和微生物的影响3个方面进行了论述,并对未来的研究方向进行了展望,为铁盐应用于污水协同除磷的研究及工程应用提供参考和借鉴。从经济和效能上考虑建议采用Fe SO4,按照摩尔比Fe:P=1.5~2.2进行投加,可以有效提高污水生物处理系统的总磷去除率(去除率>84%,出水TP<0.5 mg/L),有机物和氮的去除略有提高或者不受影响,活性污泥的污泥量增多,沉降性能提高,活性降低(铁盐投加>0.15 mmol/L),微生物总量和种群数量减少。未来需要对铁盐的常量投加(0.12~0.3 mmol/L)和微量投加(<0.02 mmol/L)对污水生物处理系统的污泥性质组成、碳氮磷代谢和微生物群落结构影响及协同除磷机理加强研究。Enhanced phosphorus removal in wastewater is one of the most serious problems for the improvement of the wastewater treatment plants, while ferric salt is a commonly used medicament. The effect of ferric salt addition on the treatment efficiency of the biological wastewater treatment system, sludge properties and microbial population was discussed in this paper. Moreover, the future research directions were prospected, which provided references for the application of phosphorus synergetic removal by ferric salt in wastewater. FeSO4 should be the optimal choice based on economics and efficiency, and the dosage should be according to 1.5 -2.2 mole ratio of Fe to P, which could improve the total phosphorus removal rate effectively in biological wastewater treatment system （removal rate 〉 84%, effluent TP〈0.5 mg/L）, and the removal of organic matter and nitrogen could improve slightly or unaffected. The amount of activated sludge increased, settling property improved and activity decreased （ferric salt dosage〉0.15 mmol/L）, and microorganism total amount and the numbers of microbial population decreased. Future research should focus on the effects of common dosage （0.12 0.3 mmol/L） and micro dosage （〈0.02 mmol/L） of ferric salt on the sludge composition of biological wastewater treatment system, carbon, nitrogen and phosphorus metabolism, microbial population structure and phosphorus synergetic removal mechanism.

关 键 词：协同除磷 强化除磷 硫酸亚铁 微生物群落 污水生物处理系统 

分 类 号：X703[环境科学与工程—环境工程]