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Reuse Treatment of Wastewater in Gold Mining

Wang Binghou;Wang Leyi;Li Wenguo;Shandong Zhaojin Motian Co.,Ltd;  
This article introduced the waste of mining wastewater and the water resources status in northwestern China, analyzed the characteristics and the necessity of mining wastewater reuse, putted forward the reasonable technology of wastewater reuse in water shortage region, introduced the process flow. This treatment process used the precipitation reactor technology to reduce the suspended solids and turbidity of wastewater, and used reverse osmosis technology to reduce salinity. Implementation results showed that the suspended solids removal efficiency of the precipitation reactor effluent reached 92.4%; the turbidity of inclined plate sedimentation tank effluent was less than 5 NTU; the TDS quality concentration of reverse osmosis effluent was less than 50 mg/L, and the turbidity was less than 0.5 NTU. It can produce 0.38×106m3reclaimed water and cut 12 t COD per year
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