一株多环芳烃降解菌在焦化废水降解中的应用研究  

Application of a Polycyclic Aromatic Hydrocarbon Degrading Strain to Coke-Plant Wastewater Degradation

作　　者：雷萍[1] 聂麦茜[2] 张志杰[2] 郭爱莲[3] 刘敬贤[1] 赵文明[1] 

机构地区：[1]西安交通大学生物工程研究所,西安710049 [2]西安建筑科技大学环境工程系 [3]西北大学生物学系

出　　处：《西安交通大学学报》2001年第10期1055-1058,共4页Journal of Xi'an Jiaotong University

基　　金：陕西省自然科学基础研究计划资助项目 (99SM18)

摘　　要：为了提高焦化废水的生物降解率 ,以萘为惟一碳源分离出 1株细菌CN3d .降解萘、吡啶、菲、芘时 ,其降解率分别达到 93 0 %、90 0 %、99 0 %和 72 5 % .纯培养的CN3d对焦化废水的降解率为 33 6 % ,将其投加于活性污泥 ,降解率达到 5 1 8% .鉴定CN3d为黄杆菌属 (Flavobacterium ) .将葡萄糖和FeCl3加入改良污泥 ,焦化废水的最大降解率达到 5 5 0 % ,这时若将焦化废水稀释至原浓度的 1/2 ,降解率可达 70 2 % .试验结果证明 ,CN3d对焦化废水有降解潜力 ,改善降解条件有利于提高投菌法的降解率 .In order to raise biodegradation value of coke -plant wastewater, a strain CN3d existing in naphthalene was isolated from the activated sludge acclimated with mixed organic compounds. For naphthalene, pyrid ine, phenanthrene and pyrene, the degradation value reached 93 0%, 90 0%, 99 0% and 72 5% respectively. Degradation value of pure CN3d to coke-plant wastew ater is 33.6% and that of reformative sludge in which CN3d is thrown in is 51.8% . Result of identification shows CN3d belonging to Flavobacterium . Added glu cose and FeCl 3 to reformative sludge, the degradation value to coke-plant wa stewater has reached 55.0%. Diluted wastewater to half of original concentration , degradation value has reached 70.2%. Experiment shows that CN3d is potential i n degrading coke-plant wastewater, and improvement of degrading condition will raise the biodegradation value.

关 键 词：焦化废水 活性污泥生物 降解率 菌株筛选 多环芳烃降解菌 废水处理 化学需氧量 

分 类 号：X784[环境科学与工程—环境工程] X172