新型曝气生物滤池填料的研制及性能分析  

Preparation and Characterization of New Type Packing for Biological Aerated Filter

作　　者：黄宇[1] 童张法[1] 唐艳葵[1] 梁达文[2] 

机构地区：[1]广西大学化学化工学院,广西南宁530004 [2]广西玉林师范学院化学与生物系,广西玉林536000

出　　处：《化工环保》2006年第3期242-245,共4页Environmental Protection of Chemical Industry

基　　金：国家自然科学基金资助项目(29806004);广西省自然科学基金资助项目(桂科基0448085)

摘　　要：以广西膨润土为原料制备新型曝气生物滤池填料。将质量分数分别为65％，3％，12％，20％的膨润土、黏结剂、造孔剂和钠化剂混合，用水调匀后经钠化、成型、干燥、煅烧后制成粒径为4～7mm、堆密度为0．7g／mL的球形膨润土多孔填料。在煅烧时间4h、煅烧温度500℃的条件下，该填料具有较高的机械强度和较好的耐水性。生物挂膜实验结果表明，该填料具有较强的吸附性能和阳离子交换性能，运行30d后对COD的去除率达到80％以上，对NH，-N的去除率达到87％以上。该填料生产工艺简单，成本低廉，具有广阔的市场前景，也为国内对膨润土的开发和利用提出了一个新的研究课题。Bentonite, which is rich in Guangxi province of China, was used as raw material to develop a new type of packing for biological aerated filter （BAF）. Bentonite, adhesive, pore-forming material and Na-modified agent with mass fraction of 65% ,3%, 12% and 20% respectively were mixed with water, and after Na-modifying, molding, drying and calcining, the spherical porous packing with particle diameter of 4-7 mm and bulk density of 0. 7 g/mL was prepared. The packing prepared under calcining time 4 h and calcining temperature 500℃is of good mechanical strength and water resistance. The results of biofilm formation experiment show that the packing is of good adsorbability and cation-exchange property. After running for 30 d, the removal rates of COD and NH3-N in wastewater are over 80% and 87%, respectively. The packing will have a wide market outlook because of its simple production process and low cost. The research puts forward a new subject for the exploitation and utilization of bentonite in China.

关 键 词：膨润土 填料 曝气生物滤池 生物膜 废水处理 

分 类 号：X703.1[环境科学与工程—环境工程]