纳米磁粉生物反应系统处理效能研究

为了提高序批式活性污泥法(SBR Sequence Batch Reactor)工艺水处理效果和缩短处理后泥水分离时间,采用纳米磁粉生物法与磁分离技术结合的新型工艺处理淀粉废水.在SBR反应器中投加修饰过的纳米磁粉悬浮液(Fe3O4),对活性污泥进行磁化驯化,利用磁粉菌胶团降解废水中有机物,在外加磁场下快速分离处理后的磁性泥水混合液,并与SBR法进行了对比.实验结果表明:磁粉活性污泥增长快,驯化成熟时间短,污泥浓度、沉降性能、单位容积处理能力和抗冲击负荷能力明显提高.在各自最佳运行条件下,磁粉生物法在生物反应器中曝气时间节省2.0 h;沉淀时间缩短50 min;统计分析知对COD、NH4+-N和TN去除率分别提高10%、9.3%和8.4%.该新型污水处理工艺操作简单、运行管理方便、污水处理效果明显提高,具有广阔的市场应用前景.

Treatment efficiency of nano-ferromagnetie powder biological system

To improve the treatment efficiency of SBR(Sequence Batch Reactor)and shorten the separation time of treated sludge and sewage,a new method combining the biological technology employing nano-ferromagnetic powder and the magnetic separation process is presented to treat starch wastewater.By adding got-up nano-ferromagnetic powder suspension(Fe3O4)into the SBR reactor,magnetizing and domesticating the common activated sludge,as well degrading the organic matter in wastewater with ferromagnetic zoogloea,the magnetic mixed liquid and biologic flocculation were separated quickly under magnetic field.And the comparison was conducted with SBR process.Results show that the domesticating maturation time of ferromagnetic-powder activated sludge is short;the growth rate,concentration,sedimentation capability,unit volume treatment capacity and capability to resist the impact load of the sludge are increased significantly.Under optimum operation conditions,the shortened time of aeration and deposition in the biological reactor is 2.0 h and 50 min.The average removal rates for COD,NH4+-N and TN are improved by 10 %,9.3 % and 8.4 % respectively.This new process is easy to operate and manage with great improvement of efficiency,thus has a broad application foreground.