摘要
在分析高钙粉煤灰(HCFA)对模拟废水脱氮除磷特性的基础上,先后采用氧化镁烟气脱硫废渣(MFGDR)、烟气脱硫(硫酸镁)废水和HCFA综合处理酸洗磷化废水和垃圾渗滤液。当酸洗磷化废水和垃圾渗滤液混合废水的NH3-N浓度为1 135 mg·L^(-1)、PO3-4-P浓度为2 766 mg·L^(-1)时,通过调整氮磷比,经过吸附、化学沉淀反应等,将污染物吸附、转化为磷酸铵镁等,并进行固液分离,NH3-N和PO3-4P的去除率分别可达到98%和99%,废水经处理可达到排放标准。不仅同步解决了热电固废、硫酸镁废水、酸洗磷化废水以及垃圾渗滤液的处理处置问题,还以废治废,降低了药剂成本,具有良好的应用前景。
Pickling and phosphating wastewater and landfill leachate were treated by magnesium-based flue gas desulfurization residue（ MFGDR）,Mg SO4 wastewater,and high-calcium fly ash（ HCFA）,based on the study of the nitrogen and phosphorus removal from model wastewater by HCFA. The concentrations of NH3-N and PO34-P were 1 135 mg·L^-1and 2 766 mg·L^-1,respectively,and the removal rates were 98% and 99%,respectively,facilitated by the processes of nitrogen-to-phosphorus ratio adjustment,adsorption,magnesium ammonium phosphate（ MAP） chemical precipitation,and solid-liquid separation. Finally,the pollutants were adsorbed and converted to MAP and other solids. Therefore,the wastewater achieved the discharge standard. By this method,the thermoelectric solid waste,magnesium sulfate wastewater,acid pickling and phosphating wastewater,and landfill leachate were treated well simultaneously. Meanwhile,the reagent cost of wastewater treatment was reduced. Therefore,this technology has good potential in the field of wastewater treatment.
出处
《环境工程学报》
CAS
CSCD
北大核心
2016年第8期4504-4510,共7页
Chinese Journal of Environmental Engineering
基金
江苏省高校科研成果产业化推进项目(JHB2012-48)
江苏省环境功能材料重点实验室项目(SJHG1306)
江苏省水处理技术与材料协同创新中心建设点项目
关键词
高钙粉煤灰
氧化镁烟气脱硫废渣
酸洗磷化废水
垃圾渗滤液
脱氮除磷
high-calcium fly ash
magnesium-based wet flue gas desulfurization residue
pickling and phosphating wastewater
landfill leachate
removal of nitrogen and phosphorus
