高含硫天然气净化厂污水深度处理与回用

Study on Advanced Treatment and Reuse Technology of Wastewater in Puguang Purification Plant

针对净化厂污水回用中总磷和微生物超标,采用了化学法进行物理膜过滤室内实验研究,对化学法杀菌、物理膜过滤除菌、生物法除菌进行了室内研究,得出采用化学法杀菌+膜过滤除菌组合工艺控制回用水中细菌总数效果最好。超滤陶瓷膜系统与化学杀菌复合联用可有效控制出水细菌总数,投加量10 mL时出水细菌总数控制在100~400个/mL。采用过滤精度为50 nm的陶瓷膜管进行了对比除菌实验,出水细菌总数基本约100个/mL。现场实验采用了超滤陶瓷膜系统和化学除磷、杀菌一体化工艺可改善回用水水质。

In the view the fact that both the total phosphorus and microorganism exceed standard in sewage reuse in purification plant,a series of lab experiments are explored,including chemical and physical membrane filtration and sterilization techniques,chemical sterilization,physical membrane filtration and biological sterilization.These results indicates that the combination of chemical sterilization and membrane filtration sterilization has the best effect.Ultrafiltration ceramic membrane system combined with chemical sterilization can effectively control the total number of bacteria in the effluent.When the dosage is 10 mL,the total number of bacteria in the effluent can be controlled at the amount of 100-400/mL.When ceramic membrane tube with filtration accuracy of 50 nm is adopted for contrast experiments,the total number of effluent bacteria is approximately 100/mL.In the field experiments,it can improve the quality of reuse water by ultrafiltration ceramic membrane system and integrated process of chemical phosphorus removal and sterilization.