新型固定化生物小球的研制及其处理模拟焦化废水的脱氮特性  

PREPARATION OF NOVEL IMMOBILIZED MICROBE BALLS AND THEIR PERFORMANCE IN THE TREATMENT OF SYNTHETIC COKING WASTEWATER

作　　者：蔡昌凤[1] 孙菲[1] 

机构地区：[1]安徽工程大学生物与化学工程学院,安徽芜湖241000

出　　处：《水处理技术》2010年第7期74-78,共5页Technology of Water Treatment

基　　金：安徽省自然科学基金重点资助(08040102002)

摘　　要：对传统的聚乙烯醇(PVA)固定化球进行改进,制作出添加麦秸、稻草粉末、颗粒活性炭(GAC)、粉末活性炭(PAC)的新型固定化球。扫描电镜(SEM)微观分析表明,PAC的加入使传统PVA小球内部结构由原来的聚结成块变为小球堆积的孔状结构,明显提高了固定化球的传质性能和通透性。24h摇床培养后,添加质量分数4%PAC的硝化菌和反硝化菌固定化球的吸水率比传统PVA小球提高了45%和34%,膨胀系数提高79%和31%;对模拟焦化废水中氨氮和硝酸盐氮降解能力提高了39.55%和6.08%。4%PAC硝化菌和反硝化菌固定化小球吸附饱和后再次使用,48h氨氮的降解率和12h硝酸盐氮的降解率可达到92.42%和73.77%。PAC的吸附作用有利于固定化球中微生物的固定,延长固定化球的使用寿命和重复利用率。The novel immobilized ball intermixed by straw powder,granular active carbon,powdered activated carbon for a improvement on the traditional PVA immobilization process.Scanning electron microscope（SEM） micro-analysis showed that the PAC make the internal structure of traditional PVA immobilized ball from blocky structure into poriform structure accumulated by small balls,significantly improved its mass transfer performance and permeability.After 24 h table culture,the water absorption of the 4 percent PAC nitrobacteria and denitrifying bacteria immobilized ball increased 45% and 34%,the coefficient of expansion of them increased 79% and 31%,nitrogen and nitrate nitrogen removal rate increased 39.55% and 6.08%.And reused after adsorption saturation,48h nitrogen and 12 h nitrate nitrogen removal rate can attain 92.42% and 73.77%.The adsorption of PAC is benefit to fix microorganisms in immobilized ball,and can extend its service life and repeating utilization factor.

关 键 词：固定化 载体 传质 焦化废水 脱氮 

分 类 号：X784[环境科学与工程—环境工程]