磁性膨润土对养牛和养猪沼液的处理性能研究  

Treatment of Cattle and Pig Biogas Slurry by Magnetic Bentonite

作　　者：王超[1,3] 王迎亚[2] 陈宁华[1] 施华珍[2] 刘坤[1] 张寒冰[1,2] 童张法[2] Wang Chao;Wang Yingya;Chen Ninghua;Shi Huazhen;Liu Kun;Zhang Hanbing;Tong Zhangfa(School of Environment, Guangxi University, Nanning, Guangxi 530004;Guangxi Key Laboratory of Petrochemical Resource Processing and Process Intensification Technology, School of Chemistry and Chemical Engineering, Guangxi University, Nanning, Guangxi 530004;Xinghua Construction Group Co., Ltd., Nanning, Guangxi 530028)

机构地区：[1]广西大学环境学院,广西南宁530004 [2]广西大学化学化工学院,广西石化资源加工及过程强化技术重点实验室,广西南宁530004 [3]兴华建设集团股份有限公司,广西南宁530028

出　　处：《非金属矿》2017年第3期93-96,共4页Non-Metallic Mines

基　　金：国家自然科学基金项目(21576055、51668006);广西碳酸钙产业化工程院开放课题(TSG201501);广西石化资源加工及过程强化技术重点实验室主任课题(2016Z006)

摘　　要：采用微波共沉淀法合成磁性膨润土(M-Bent),并研究其对养牛和养猪沼液中化学需氧量COD和悬浮物SS的去除效果。M-Bent的XRD、VSM的表征结果表明:磁性Fe3O4纳米颗粒已负载到膨润土上,M-Bent的饱和磁化值为9.41 A·m2/kg,能够成功实现固液分离。吸附实验结果表明:随着M-Bent投加量的增加,对猪、牛沼液中COD和SS的去除率均增大,当投加量为1.0 g/L时,猪沼液中COD和SS的浓度即达到国家标准(GB 18596-2001)的排放要求;由于牛沼液中COD和SS的浓度较高,采用"混凝+吸附"的组合工艺处理牛沼液比单独使用M-Bent吸附的去除效果更佳,并且可达到GB 18596-2001的排放要求。Livestock biogas slurries in our country contain a large number of toxic and harmful pollutants including antibiotic and hormone,hence it is very important to control the emission concentrations of COD and SS in livestock biogas slurry.In this study,magnetic bentonite(M-Bent)was prepared by microwave precipitation oxidization method and applied for COD&SS removal from cattle and pig slurries.The characterization results of XRD and VSM showed that the magnetic Fe3O4particles were coated on bentonite.The saturation magnetization value of M-Bent was9.41A?m2/Kg,which indicated that M-Bent can be separated from wastewater successfully.The adsorption experiments indicated that COD and SS removal from cattle and pig biogas slurry by M-Bent increased with the increase of adsorbent dosage.The concentrations of COD and SS in pig biogas slurry were up to the discharge standard of the national standards(GB18596-2001)using1.0g/L M-Bent.Due to the higher concentration of COD and SS in cattle biogas slurry,the combined process of coagulation and adsorption was better than the single M-Bent adsorption for cattle biogas slurry and the emission concentrations of COD&SS can meet the GB18596-2001standard.

关 键 词：磁性膨润土 COD SS 吸附 

分 类 号：X703[环境科学与工程—环境工程] TD97[矿业工程—选矿]