Sewage treatment equipment > Zl - zzws002 papermaking wastewater treatment equipment
Equipment basic configuration:
Name: papermaking wastewater treatment equipment
Model: zl - zzws002
Sewage quantity of 10-200 (m3 / h)
Ozone dosage (54 g/h)
Air volume 54 (m3 / min)
Air tank volume 50 (m3)
Meter specifications (210 m3 / h)
Outlet pipe diameter (110 mm)
Inlet pipe diameter (90 mm)
Shape size 1509 * 2410 * 1830 (cm)
The aerator power 20 (kw)
Papermaking industry to use wood, straw, reeds, rags, etc as the raw material, by high temperature and high pressure cooking and cellulose was isolated, made from paper pulp.In the process of production, and finally discharge the raw material of the cellulose as papermaking black liquor.Black liquor containing lignin, cellulose, volatile organic acids, etc., have bad smell, polluting is very strong.
Mainly from paper industry wastewater treatment in pulp and papermaking industry in the production of pulp and writing two production process.Pulping is to separate the fiber in plant material, make pulp, then through bleaching, this process produces a large amount of papermaking wastewater;Writing is the dilution, molding, pressing, drying, made of paper, this process is also prone to paper making wastewater.
Pulping and papermaking waste water, pollution is most serious.When washing pulp effluent is dark brown, called blackwater blackwater high concentrations of pollutants in the BOD as high as 5 to 40 g/L, contains a lot of fiber, inorganic salt and pigment.Papermaking effluent from bleaching process also contains large amounts of acid and alkali substances.Dipping paper machine of papermaking wastewater, known as white water, which contains a lot of fiber and added in the production process of packing and rubber.
Papermaking wastewater treatment should concentrate on improving circulation water use ratio, reduce water consumption and wastewater emissions, at the same time should also actively explore a variety of reliable, economic, and can make full use of waste water in the wastewater treatment method of useful resources.Flotation waste water treatment method, for example, fibrous solid material in the recycled water, recovery rate can reach 95%, clear water reuse;Burning waste water treatment method of recycling the blackwater in sodium hydroxide, sodium sulfide, sodium sulfate and other sodium salt with organic matter.And wastewater treatment method to adjust wastewater pH;Coagulation sedimentation or flotation process can remove suspended solids in the waste water;Chemical precipitation to decolorization;Biological treatment can remove BOD of kraft paper wastewater treatment is effective;Wet oxidation method sulfite pulp wastewater treatment is more successful.