猪粪废水资源化处理工艺研究  

Research on resource treatment technology ofpig manure wastewater

作　　者：王佳 赵晓蕾[1] 黄红英[2] 徐跃定[2] 孙恩惠[2] WANG Jia;ZHAO Xiao-lei;HUANG Hong-ying;XU Yue-ding;SUN En-hui(School of Chemical Engineering,Nanjing University of Science and Technology,Nanjing 210094,China;Institute of Agricultural Science and Environment,Jiangsu Academy of Agricultural Sciences,The Key Laboratory of Cultivation and Breeding,Ministry of Agriculture and Rural Affairs,Jiangsu Collaborative Innovation Center for Solid Organic Waste Resource Utilization,Nanjing 210014,China)

机构地区：[1]南京理工大学化工学院,江苏南京210094 [2]江苏省农业科学院农业资源与环境研究所农业农村部种养结合重点实验室江苏省有机固体废弃物资源化协同创新中心,江苏南京210014

出　　处：《应用化工》2021年第9期2357-2361,2366,共6页Applied Chemical Industry

基　　金：国家重点研发计划(2017YFD0801403);国家青年科学基金(41807132);江苏省农业自主创新项目(CX(17)2024)。

摘　　要：采用无机酸矿化+MAP沉淀+石灰乳聚沉工艺,处理含水率95%的猪粪废水,研究不同时间下无机酸的矿化效果和pH对MAP沉淀的影响,考察磷酸和镁盐投加量对MAP沉淀去除NH^(+)_(4)-N和PO ^(3-)_(4)-P效果的影响,进一步投加石灰乳聚沉,进行二次固液分离处理。研究表明,无机酸矿化+MAP沉淀+石灰乳聚沉工艺可有效提高猪粪废水固液分离效率,降低废水污染物含量,减小后续水处理难度,具有较好的资源化前景。猪粪废水的最佳投药量分别为:磷酸3.5 g/kg,镁盐9 g/kg,石灰乳16 g/kg,对NH^(+)_(4)-N、TN、PO ^(3-)_(4)-P、TP和浊度的去除率分别为75.6%,44.84%,95.52%,92.39%,95.40%。Using the mineral acid mineralization+MAP precipitation+lime milk coagulation process to solve pig manure wastewater with 95%moisture content,the effects of mineral time of inorganic acid and pH on MAP precipitation were studied,the effect of different dosage of phosphoric acid and magnesium salt on the removal of NH^(+)_(4)-N and PO ^(3-)_(4)-P after MAP precipitation were also investigated.Lime emulsion was added to the effluent and the secondary solid-liquid separation was conducted.Studies have shown that the mineral acid mineralization+MAP precipitation+lime milk coagulation process can effectively improve the solid-liquid separation efficiency of pig manure wastewater,significantly reduced the content of pollutants in pig manure wastewater and reduced the difficulty of subsequent water treatment,and it has a good prospect of resource utilization.The optimal dosage for pig manure wastewater treatment is 3.5 g/kg phosphoric acid,9 g/kg magnesium salt and 16 g/kg lime milk.The removal rates of NH^(+)_(4)-N,TN,PO ^(3-)_(4)-P,TP and turbidity were 75.6%,44.84%,95.52%,92.39%and 95.40%,respectively.

关 键 词：猪粪废水 矿化 MAP 固液分离 资源化处理 

分 类 号：TQ450.9[化学工程—农药化工] TQ444.2