景观用水处理及中水再生回用示范工程

STUDY ON ENHANCED REMOVAL OF MICRO POLLUTANTS IN REUSING RECLAIMED WATER OF THERMAL POWER PLANTS WITH THE MODIFIED QUARTZ SAND

采用适合其分散处置特点的流化床和臭氧气浮装置对高档社区的景观水以及建筑中水进行再生处理。首先针对流化床工艺,用Fe3O4作为回流絮凝助凝剂,以增强悬浮层的稳定形成。其次,增设微孔曝气系统。一方面对流化床回流的Fe3O4进行水力再生;另一方面提高水中的溶解氧,降低臭味,提高系统的好氧微生物处理能力。最后,改变工艺流程,使景观水进水杂排水池,通过流化床处理。运行结果表明,出水水质完全符合GB/T18920-2002和GB/T18921-2002中的娱乐性景观环境用水、道路清扫、城市绿化和车辆冲洗的用水水质标准。

The purpose of the research was to regeneration processing water in landscape and the building using fluidized bed and ozone flotation device. It was suitable for its characteristics of decentralized disposal in upscale community. There were some water quality index cannot meet the requirements during commissioning. So firstly, Fe3O4 was used in the system treatment as coagulant for backflow flocculation. It would enhance the stability of suspended layer formation in the fluidized bed to Fe3O4. Secondly, added micro-aeration system. On one hand, it can hydraulic regeneration after backflow from fluidized bed to miscellaneous water pool; On the other hand, it can improve dissolved oxygen in the water, reducing the odor, and improving the system of aerobic microorganisms processing power to water. Finally, changing the process. It made the landscape water run into miscellaneous water pool by fluidized bed processing. So that it can increase the turbidity in water to fluidized bed, enhance flocculation, also can make ozone flotation device into a deep treatment facilities. Results showed that the water quality in outlet can meet the requirement GB/T18920-2002 and GB/T18921-2002 for recreational landscape environment water, road sweeping, urban greening and vehicle flushing.