Closed circulation and zero emission processes for papermaking wastewater
A closed-cycle, paper-making wastewater technology, applied in processing process wastewater treatment, aerobic and anaerobic process treatment, flotation water/sewage treatment, etc., can solve secondary sticky copying and quality impact, organic pollutant concentration Accumulation, equipment corrosion and other problems can be achieved to reduce the processing burden, reduce fiber loss, and ensure the effect of processing
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[0016] As shown in the attached drawings, the waste water passes through the grid to cut off the paper scraps, foamed paper, plastic paper and large particles in the water and enters the water collection regulating tank to adjust the water volume and uniform water quality, and then the water is lifted to the inclined net for recycling by a pump Fiber, then the waste water flows into the shallow air flotation tank for flocculation and air flotation reaction. It discharges the water statically through dynamic effluent, and the floating distance is minimized, and is not affected by the effluent flow rate, so that the floating body floats vertically to the surface in a relatively static environment At the same time, add the flocculating agent polyacrylamide (PAM) and polyaluminum chloride (PAC) according to a certain amount (depending on the water quality). The depth of the pond is only about 450mm, and the residence time of the sewage in the air flotation is only 3~5min ( Tradition...
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