脱硫废水资源化处理高磷废水研究  

Utilization of desulfurization wastewater for treatment of high phosphorus wastewater

作　　者：张勇[1] 赵晓丹 田小测 黄诚[1] 余凌洁 吴军辉[1] 周振 Zhang Yong;Zhao Xiaodan;Tian Xiaoce;Huang Cheng;She Lingjie;Wu Junhui;Zhou Zhen(Shanghai Waigaoqiao Power Generation Co., Ltd.,Shanghai 200137,China;Shanghai University of Electric Power,Shanghai 200090,China)

机构地区：[1]上海外高桥发电有限责任公司,上海200137 [2]上海电力大学,上海200090

出　　处：《工业水处理》2019年第9期37-41,共5页Industrial Water Treatment

基　　金：国家自然科学基金项目(51878403)

摘　　要：以高磷废水为处理对象,提出了脱硫废水资源化除磷方案。考察了Mg2+浓度、pH、脱硫废水与高磷废水混合体积分数(FPR)和初始磷浓度对除磷效果的影响,结果表明,升高pH有利于除磷,Mg2+浓度对除磷效果的影响不大;初始磷浓度越大,脱硫废水除磷效率越高;当初始钙磷比(物质的量比)大于2.0,pH≥10时,磷去除率可维持在95%以上,出水磷质量浓度小于0.5 mg/L。XRD、SEM结果表明,中性条件下,沉淀物主要为CaHPO4·2H2O;碱性条件下,沉淀物主要为Ca3(PO4)2·n H2O,Mg2+会掺入晶体相,形成白磷钙石。A scheme was proposed for removing phosphorus from the effluent of the desulphurization wastewater treatment system. The effects of Mg2+ concentration,pH,mixed wastewater ratio(FPR) and initial phosphate concentration on phosphorus removal were investigated. The experimental results showed that the increase of pH was beneficial to remove phosphorous,while Mg2+ concentration had no significant effect on the phosphorus removal. For the wastewater with different initial phosphorus concentration,appropriate FPR should be used. The higher the initial phosphorus concentration was,the higher the phosphorus removal efficiency of the desulfurization wastewater was. When the initial Ca/P ratio was greater than 2 and the pH was greater than 10,the phosphorus removal rate maintained at more than95%,and the effluent phosphorus concentration was less than 0.5 mg/L. From the analysis of XRD, SEM on the sediment,CaHPO4·2 H2O was mainly produced under neutral conditions,whereas the precipitates converted into Ca3(PO4)2·n H2O in alkaline condition. The presence of Mg2+was incorporated into the crystalline phase to form the whitlockite.

关 键 词：脱硫废水 “三联箱”工艺 资源化 高磷废水 

分 类 号：X703.1[环境科学与工程—环境工程]