【作者】 白晓平；

【导师】 杨云龙；

【作者基本信息】 太原理工大学 ， 市政工程， 2002， 硕士

【摘要】 焦化废水中含有大量的有毒难降解有机污染物，采用常规活性污泥法处理，出水COD仍较高。进一步降低焦化废水出水COD的关键是去除这类难降解有机污染物。本项实验从4种脱色菌——普通变形杆菌BH、芽孢杆菌DC45、巨大芽孢杆菌F3、枯草芽孢杆菌DC42中筛选出普通变形杆菌BH、芽孢杆菌DC45 2株降解苯酚、吲哚、吡啶、喹啉的优势菌，从焦化厂曝气池活性污泥中筛选出BM7、DM1、EM5、BP3 4株降解苯酚、吲哚、吡啶、喹啉的优势菌，并对普通变形杆菌BH、芽孢杆菌DC45、BM7、BP3分别进行了降解特性研究。将优势菌株固定化混合后组成高效复合菌，采用厌氧水解-好氧（高效复合菌+活性污泥）两段SBR处理焦化废水，进水COD、BOD₅、NH₃-N浓度分别为507.73～698.13mg／L、153.86～232.00mg／L、181.44～195.05mg／L，经12h厌氧水解、18h好氧曝气后出水浓度分别为88.85～136.93mg／L、23.47～39.30mg／L、61.69～77.11mg／L，去除率分别为80.39％～82.50％、83.06％～84.75％、60.47％～66.00％；采用厌氧水解-好氧（高效复合菌+光合细菌+活性污泥）两段SBR处理焦化废水，进水COD、BOD₅、NH₃-N浓度分别为923.47～1067.79mg／L、216.38～287.3mg／L、173.34～218.86mg／L，经12h厌氧水解、18h好氧曝气后出水浓度分别为112.08～147.45mg／L、26.92～32.60mg／L、45.73～52.60mg／L，去除率分别为86.19％～87.86％、87.56％～88.65％、73.62％～75.97％。实验表明：利用该高效复合菌或高效复合菌和光合细菌处理焦化废水可使出水COD、BOD。满足《污水综合排放标准》（GB8978——96）中的排放要求，废水浊度明显降低，同时还具有一定的脱氮功能；对于已建成的焦化厂污水处理系统，可直接投加固定化高效复合菌及光合细菌来提高处理效率。更多还原

【Abstract】 Coke plant wastewater containing toxic and refractory substances is treated by routine actived studge process,the residual COD can not achieve comprehensive wastewater discharge standard(GB8978-96).The key which reduces the effluent concentration of COD is to remove refractory organic pollutants.In this experiment, Proteus oulgaris BH and Bacillus DC45 which are two dominant species to degradate phonel,indole,pydine and quinoline were cultured and selected from four decolorizing bacteria - Proteus oulgaris BH,Bacillus DC45, Bacillus megaterium F3 and Bacillussubtilis DC42.In addition,BM7,DM1,EMS and BP3 which are four dominant species to degradate phonel, indole.pydine and quinoline were isolated and selected from activated sludge in aeration tank of coke plant.Degradation behavior of Proteus oulgaris BH,Bacillus DC45, BM7 and BP3 were researched. After putting dominant species which were immobilized on activated sludge into wastewater treatment system,coke plant wastewater was treated by the process of anaerobic hydrolysis-aerobic SBR,initial concentration of COD,BOD5, NHs-N ranged from 507.73 to 698.13 mg/L,from 153.86 to 232.00mg/L,from 181.44 to 195.05 mg/L respectively,after treatment of anaerbic acidification reactor for 12 hours and aerobic reactor for 18 hours,the residual concentration-of COD, BOD5, NH3-N ranged from 88.85 to 136.93 mg/L,from 23.47 to 39.30mg/L,from 61.69 to 77.11mg/L respectively.the total removal rate of COD, BOD5 and NH3-N were up to 80.39% ~ 82.50%,83.06% ~ 84.75%,60.47% ~ 66.00% respectively.After putting immobilizedPhotosynthetic bacteria into foregoing aerobic reactor,coke plant wastewater was treated by the process of anaerobic hydrolysis-aerobic SBR.initial concentration of COD, BOD5,NH3-N ranged from 923.47 to 1067.79mg/L,from 216.38 to 287.3mg/L,from 173.34 to 218.86 mg/L,after treatment of anaerobic acidification reactor for 12 hours and aerobic reactor for 18 hours,the residual concentration of COD,BOD5,NH3-N ranged from 112.08 to 147.45mg/L,from 26.92 to 32.60mg/L,from 45.73 to 52.60mg/L respectively,the total removal rate of COD, BOD5 and NH3-N were up to 86.19% ~ 87.86%,87.56% ~ 88.65%,73.62% ~ 75.97% respectively.The results show that after putting dominant species or dominant species and Photosynthetic bacteria which are immobilized on activated sludge into wastewater treatment system, the level of COD and BOD5 in coke plant wastewater which is treated by the process of anaerobic hydrolysis-aerobic SBR can achieve comprehensive wastewater discharge standard (GB8978-96), the turbidity decreases rapidly,NH3-N decreases to a certain degree.Moreover,for a built coke plant sewage treatment system,the treatment efficiency can be improved after putting dominant species and Photosynthetic bacteria which are immobilized on activated sludge into wastewater treatment system.更多还原