高效降解菌用于含盐废水生物处理  

Biological Treatment of Saline Wastewater by High Efficient Degradation Bacteria

作　　者：龚小芝[1] Gong Xiaozhi(Sinopec(Beijing)Chemical Research Institute Co.,Ltd,Beijing 100013,China)

机构地区：[1]中石化(北京)化工研究院有限公司,北京100013

出　　处：《绿色科技》2023年第4期108-114,共7页Journal of Green Science and Technology

摘　　要：对含盐污水三级生化进、出水进行分析,确定了污水中生物难降解有机物主要为直链烷烃。从含盐污水生化处理二沉池污泥中优选出三株在3%的盐度下有较高降解能力的菌株,经鉴定,均为芽孢杆菌属。菌株特性测试结果表明:此三株菌有较强的耐盐能力,在3.5%盐度下能较快的生长;在30~35℃,pH值7.0~7.5时,此三株菌生长最好。将三株菌混合培养后用于实际废水生物处理,与原生物处理工艺相比:缩短了水力停留时间25%,同时出水的COD比实际排水指标低14 mg/L。By analyzing the three-stage biochemical inlet and outlet water of saline wastewater,it is determined that the refractory organic matter in the wastewater is straight chain alkane.Three strains with high degradation ability at 3%salinity were selected from the sludge of the secondary sedimentation tank for biochemical treatment of saline wastewater.They were identified as bacillus.The results of strain characteristics test showed that the three strains had strong salt tolerance and could grow rapidly at 3.5%salinity;The three strains grew best at 30~35℃and pH 7.0~7.5.The mixed culture of three strains of bacteria was used for biological treatment of actual wastewater.Compared with the original biological treatment process,the hydraulic retention time was shortened by 25%.At the same time,the effluent water quality index COD was 14 mg/L lower than the actual drainage index.

关 键 词：耐盐 芽孢杆菌属 原油降解 石油烃 好氧生物膜 

分 类 号：X703[环境科学与工程—环境工程]