磷化工高浓度磷废水的化学-絮凝沉淀法预处理研究  

Pretreatment of high-concentration phosphorus chemical wastewater using the chemical-flocculation precipitation method

作　　者：黄福杨 张瀚文 王彬[1,2] 朱静平 黄敏[1,2] 谌书 周明罗 HUANG Fuyang;ZHANG Hanwen;WANG Bin;ZHU Jingping;HUANG Min;CHEN Shu;ZHOU Mingluo(School of Environment and Resources,Southwest University of Science and Technology,Mianyang 621010,Sichuan,China;Low-cost Wastewater Treatment Technology International Sci-Tech Cooperation Base of Sichuan Province,Mianyang 621010,Sichuan,China)

机构地区：[1]西南科技大学环境与资源学院,四川绵阳621010 [2]低成本废水处理技术四川省国际科技合作基地,四川绵阳621010

出　　处：《安全与环境学报》2025年第4期1553-1563,共11页Journal of Safety and Environment

基　　金：西南科技大学博士基金项目(21zx7156)。

摘　　要：为避免磷化工企业高磷废水造成的水体磷污染,进而导致水体富营养化,同时缓解磷资源短缺问题,研究以某磷化工高磷废水为对象[总磷(Total Phosphorus, TP)质量浓度为560 mg/L],探究了钙盐和絮凝剂类型、投加量、废水pH值、振荡速度、时间等对除磷效果的影响,并结合响应曲面法(Response Surface Method, RSM)对参数进行优化,实现了有效“磷回收”。研究发现:控制钙盐投加量可使处理后废水pH值在6~8,进而使后续絮凝沉淀效果较好;此外,化学-絮凝沉淀的最优条件为氢氧化钙[Ca(OH)2]+氯化钙(CaCl2)投加质量浓度为1.98 g/L+1.00 g/L,振荡速度为170 r/min,反应时间为13.1 min, TP去除率为97.6%;聚合氯化铝(Polyaluminum Chloride, PAC)+聚丙烯酰胺(Polyacrylamide, PAM)投加质量浓度为0.60 g/L+0.03 g/L,振荡速度为100 r/min,反应时间为15 min时,TP去除率为70.5%,废水TP质量浓度为4.00 mg/L。X射线衍射图谱表明,化学沉淀的主要成分为羟基磷灰石[Ca5(PO4)3(OH),Hydroxyapatite, HAP],可被资源化利用,实现了“磷回收”。因此,采用化学-絮凝沉淀法处理磷化工高浓度含磷废水有较好的运用前景。To prevent phosphorus pollution in water bodies resulting from high-phosphorus wastewater generated by chemical enterprises,which can lead to eutrophication,and to help mitigate the depletion of phosphorus resources;the study examined the effects of various factors,including the type and dosage of calcium salts and flocculants,pH,oscillation speed,and time,on phosphorus removal from high-phosphorus wastewater(total phosphorus concentration of 560 mg/L)in the phosphorus chemical industry.Response Surface Methodology(RSM)was employed to optimize these parameters,resulting in effective phosphorus recovery.The research indicates that phosphorus removal via chemical precipitation is affected by the type and dosage of calcium salts,wastewater pH,agitation speed,and reaction time.After optimization using RSM,the ideal conditions for treating the wastewater were determined to be a calcium hydroxide[Ca(OH)2]dosage of 1.98 g/L and a calcium chloride(CaCl 2)dosage of 1.00 g/L,with an agitation speed of 170 r/min and a reaction time of 13.1 minutes.Under these conditions,the Total Phosphorus(TP)removal rate reached 97.6%.This approach not only maintains the pH of the treated wastewater between 6 and 8 but also reduces treatment costs.Additionally,phosphorus removal through flocculation and sedimentation is influenced by factors such as the type and dosage of flocculants,wastewater pH,and reaction time.The optimal conditions for this method were identified as a dosage of 0.60 g/L for Polyaluminum Chloride(PAC)and 0.03 g/L for Polyacrylamide(PAM),with a reaction time of 15 minutes,resulting in a TP removal rate of 70.5%.Validation experiments conducted with industrial wastewater confirmed the optimal conditions for the“chemical-flocculation sedimentation”process,demonstrating TP removal rates of 97.6%for chemical precipitation and 70.5%for flocculation precipitation.These results were consistent with those obtained from simulated wastewater.X-ray Diffraction analysis of the chemical precipitate revealed that the primary co

关 键 词：环境工程学 磷化工 高浓度含磷废水 化学-絮凝沉淀 响应曲面 资源化利用 

分 类 号：X13[环境科学与工程—环境科学]