Method for reusing municipal wastewater for circulating-cooling water and power-plant boiler feedwater
A technology for circulating cooling water and urban sewage, applied in chemical instruments and methods, biological water/sewage treatment, flotation water/sewage treatment, etc., can solve the problem of reducing the life of UF membrane and RO membrane, affecting UF and RO treatment, and effluent Unstable water quality and other problems, achieving significant economic benefits, small footprint, and less land occupation
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[0038] Using the qualified sewage that meets the discharge standard after secondary biochemical treatment in an urban sewage treatment plant as the source water, the treatment scale is about Q = 20000m 3 / d (mainly used as first-level desalted water for equipment or power plants, that is, medium-pressure boiler water used by medium-pressure boilers in power plants, and a small amount is used as circulating cooling water). There are two moving bed biofilm reactors with a size of 27.0×11.0×6.0m; two air flotation filters with a size of 10.0×5.0×6.0m; 8 rows of ultrafiltration membrane units are in normal operation (seven openings and one standby). The total membrane flux of the primary reverse osmosis equipment is 50544m 3 / d, the total membrane flux of the secondary reverse osmosis equipment is 30240m 3 / d. The method of using the present invention to process the qualified sewage that meets the discharge standard after secondary biochemical treatment in a certain urban sewage...
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