低温化学沉淀和冷冻浓缩结晶法处理高盐废水及回收磷酸盐  

Treatment of High Salt Wastewater and Recovery of Phosphate by Low Temperature Chemical Precipitation and Freezing Concentration Crystallization

作　　者：张传好 魏静玉 陈晓远 殷俊 袁振文 闫莹[2,3] 张乐华[2,3] 廖本仁 ZHANG Chuanhao;WEI Jingyu;CHEN Xiaoyuan;YIN Jun;YUAN Zhenwen;YAN Ying;ZHANG Lehua;LIAO Benren(Shanghai No.4 Reagent Chemical Co.,Ltd.,Shanghai 201512,China;National Engineering Laboratory for Industrial Wastewater Treatment,School of Resources andEnvironmental Engineering,East China University of Science and Technology,Shanghai 200237,China;State Environmental Protection Key Laboratory of Enviromental Risk Assessment and Control onChemical Rrocess East China University of Science and Technology,Shanghai 200237,China)

机构地区：[1]上海试四化学品有限公司,上海201512 [2]华东理工大学工业废水无害化与资源化国家工程研究中心,上海200237 [3]华东理工大学国家环境保护化工过程环境风险评价与控制重点实验室,上海200237

出　　处：《上海染料》2024年第1期1-5,共5页Shanghai Dyestuffs

摘　　要：采用低温化学沉淀法和冷冻浓缩结晶法处理模拟磷酸盐废水,考察了进水浓度、温度、pH与结晶时间等工艺参数对磷酸盐回收效果的影响。结果表明,低温条件下加入CaCl2生成Ca3(PO4)2沉淀较少,处理效果较差,但是可以加入碱调节pH,使沉淀增多;冷冻浓缩处理过程中的磷酸盐结晶析出较多,磷酸盐析出量随成冰率的增加而增加。The low temperature chemical precipitation and freezing concentration crystallization were used to treat simulated phosphate wastewater and investigate the effects of process parameters such as influent concentration,temperature,pH and crystallization time,etc.on phosphate recovery efficiency.The results showed less Ca3(PO4)2 precipitates when CaCl2 is added at a low temperature,and the treatment effect is poor,but the precipitation can be increased by adding alkali to increase pH.More phosphate crystals precipitates under freezing concentration treatment,and the amount of precipitated phosphate increases with the increase of ice formation rate.

关 键 词：高盐废水 高磷废水 化学沉淀 资源化 冷冻结晶 

分 类 号：X703[环境科学与工程—环境工程]