Combined backwashing water treatment and reuse system

The invention discloses a combined backwashing water treatment and reuse system. The process comprises plural sets of the systems in parallel, wherein each set of the system comprises a water distribution system, a mixing reaction system, a precipitation system and a clear water reuse system. According to the present invention, mixing, flocculation, precipitation and static sinking treatment backwashing water process are reasonably integrated, such that the system has good anti-shock load capacity, the backwashing wastewater containing Fe and Mn can be effectively treated, and the effluent quality meets the standard and is stable; the two operation modes can be achieved by adjusting the front end gate valve and the adjustable decanter, wherein the adjustable decanter can achieve the non-power operation, and can float up and down or can be fixed according to the working conditions so as to greatly save the energy consumption and the investment in self-control facilities; and the processcan be successfully used