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纳米磁粉对处理制浆中段废水驯化微氧活性污泥的影响
Effect of Magnetic Fe3O4Nanoparticles on Micro-aerobic Activated Sludge Domestication with Pulping Middle-stage Effluent
收稿日期：  
DOI：10.11980/j.issn.0254-508X.2018.07.008
关键词:  纳米磁粉  微氧  活性污泥  制浆中段废水
Key Words:magnetic nanoparticles  micro-aerobic  activated sludge  pulping middle-stage effluent
基金项目:广东省教育厅自然科学项目（2015KTSCX140）。
作者单位
王玥婷 东莞理工学院生态环境与建筑工程学院，广东东莞，523808 
兰善红* 东莞理工学院生态环境与建筑工程学院，广东东莞，523808 
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摘要:本实验采用共沉淀法制备了Fe3O4纳米磁粉，研究Fe3O4纳米磁粉对处理制浆中段废水驯化微氧活性污泥的影响。结果表明，投加Fe3O4纳米磁粉对废水的处理效果及污泥的理化特性均优于未投加纳米磁粉的空白组；当纳米磁粉投加量为1.0 g/L时，经55天的驯化，废水CODCr去除率达到80%左右，而未投加纳米磁粉的废水CODCr去除率不到70%；驯化后污泥具有良好的理化特性，污泥浓度（MLSS）为3.86 g/L，污泥体积指数（SVI）稳定在70 mL/g左右，PN∶PS值为0.87，明显优于未投加纳米磁粉的空白组。
Abstract:Effect of magnetic Fe3O4 nanoparticles on micro-aerobic activated sludge domestication with pulping middle-stage effluent was studied. The magnetic Fe3O4 nanoparticles were prepared by co-precipitation method and characterized by SEM. The effect of Fe3O4 nanoparticles dosage on activated sludge domestication with pulping middle-stage effluent under micro-aerobic conditions was investigated through static experiments. The results showed that the treatment effect and the physical-chemical characters of the sludge with the addition of Fe3O4 nanoparticles were better than that of without adding Fe3O4 nanoparticles. CODCr removal efficiency reached about 80% for 55d domestication when Fe3O4 nanoparticle dosage was 1.0 g/L， while no higher than 70% achieved in the control sample. MLSS， settling and flocculating performances of the sludge were obviously superior to the control group．
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