PVF悬浮填料的制备及其污水处理效果的研究

Preparation of suspended carrier PVF(polyvinyl alcoholformaldehyde) foams and its performances in waste water treatment

制备了一种新型的高分子多孔载体———活性泡沫填料,它是聚乙烯醇和甲醛的缩聚物(PVF)。其比表面积大、密度接近于水,具有良好的亲生物特性,可作为悬浮填料在移动床工艺中为微生物提供附着生长的载体。研究表明,在复合式生物反应器中加入不同活性炭质量分数的两种活性PVF泡沫填料处理模拟生活污水,其COD的去除率在95%以上,氨氮的去除率为80%左右。在相同的工艺条件下活性炭质量分数为8%的PVF填料COD的去除效果和反硝化效果更为理想。当两填料体系中COD与NH4+-N的质量浓度比为20时,两系统的同时硝化反硝化(SND)效果均为最理想。

A new kind of porous polymer carriers, active PVF foam, was prepared in this paper. The PVF carriers have a large specific surface area and an excellent compatibility to the microbes. And their specific gravity is near to water, and they can provide habitat to accrete and grow for microorganism in the Moving Bed Biofilm Reactor Process （MBBR）. It was shown that the removal rates of COD and NH4^＋ -N were about 95 % and 80 %, respectively when two kinds of PVF carriers were used to treat the simulative sanitary sewage in the Hybrid Biologyical Reactor, with prominently application. Under the same process conditions, the PVF carriers whose content of active carbon is 8 % had more preferable removal rate of COD, and the denitrification effect was more perfectly. When the concentration ratio PC/N of COD to NH4^＋ -N was 20 and the DO concentration was 2.0 - 2.2 mg/L, SND in MBBR was most amiable to occure.