Design and Operation of Gongnongzha Wastewater Reuse Project of Xiangtan Iron and Steel Co.Ltd.

The accelerated clarifier/air-water backwashing filter process was used to treat wastewater from Gongnongzha of Xiangtan Iron and Steel Co.Ltd.Some measures were taken,including adding inclined tubes in separation zone of the accelerated clarifier,returning sludge in and around the clarifier,using ceramic media in air-water backwashing filter and so on.The effluent was reused for the circulating and cooling water systems.The operation results showed that the reused water quality was stable and met the requirements of various indexes.The improved process has characteristics of reasonable design,small footprint,low construction and operation costs.The wastewater reuse project has reference significance for the design and operation of similar projects.