【摘要】 利用砂滤池的截滤作用,对给水深度处理工艺炭滤池出水微型生物进行把关,解决O3-BAC工艺生物穿透问题。结果表明,后置砂滤池比常规净水工艺砂滤池出水微型生物密度小,后置砂滤池采用粒径较小的滤砂能更好地解决微型生物穿透现象。对于浊度为0.5 NTU左右的炭滤池出水,应适当采用粒径较小的滤砂,以提高对浊度的去除率,采用双层填料砂滤池可以使出水平均浊度降至0.10 NTU,提高了城市供水生物安全性。更多还原

【Abstract】 The pilot test studied on using sand flirtation to handle the problem of microorganism leak which was observed in the effluent of BAC filter.Compared with sand filtration in the traditional water purification process,least microorganism was observed in the sand filter followed the BAC filter,and using smaller size sand can enhance the ability of withholding microorganism in sand filter.For the turbidity of the effluent of the BAC filter was about 0.5 NTU,smaller size sand should be applied to the sand filter to increase the removal rate of turbidity,while using two-stage sand filtration can decrease average values of the turbidity to 0.10 NTU,and improve the bio-security of urban water supply.更多还原