Full Process Engineering Design of Tideland Reservoir Water Source Plant
A coastal area in Zhejiang is short of water resources.Sometideland reservoirshas been built in the coastal mudflat for water resources development and utilization.The water in the coastal reservoir is characterized by high pH and alkalinity,high chlorides,excessive organic substances,and low temperature in winter.This paper elaborates on the engineering design of urban industrial water plants using the tideland reservoir as the water source.The designed water supply scale of the water treatment plant(WTP)is 100 000 m3/d.The treatment process adopted includes pipeline mixing,folding plate flocculation,horizontal sedimentation,ultrafiltration,reverse osmosis,and post mineralization.The filter tank and ultrafiltration backwash water are reused after sedimentation,and the reverse osmosis concentrated water is discharged into the sea for disposal.The sludge is mechanically concentrated and dehydrated to 80％before being transported for disposal.The project has been completed and operated for 3 years,and the effluent water quality indices have remained stable and met the expected engineering results overall.
tideland reservoirdouble-membrane processultrafiltrationreverse osmosispost mineralizationmud water reuse
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