Physical and chemical treatment technology of wastewater treatment in pulp and paper industry application

Equipment principles

the papermaking wastewater after flocculation reaction can isolate a large amount of sludge, which contain fiber and flocculent mud have good adsorption capability, such as activated carbon precipitation in the past or air flotation process, only these solids separation, no longer give full play to these sludge filter attached only. EWP high efficiency wastewater purifier is the use of these generated after flocculation reaction flocculation sediment within the purifier to form a stable and continuous automatic updates only attached to the governor of fluidized bed, the pollutants have the effect of activated carbon, make into the sewage in addition to get normal coagulation reaction after solid-liquid separation effect, also resulting in the filtration and adsorption sewage purification treatment, can achieve than ordinary air flotation or precipitation of the physico-chemical treatment process to improve 10 - The removal rate of 20%. Because the EWP high efficiency wastewater purifier without any filter material or filler as the filter bed, won't be blocked, so the sand filter or from other filtering devices necessary backwash of trouble and additional power consumption, more solve the filter material after processing equipment accident disabled harden congestion caused by the drought. EWP high efficiency wastewater purifier is a concentration of sewage flocculation reaction, precipitation, adsorption, filtration, sludge concentration, and other functions in one of the equipment.

engineering application

1 processing scale in the pearl river mill regulation project, the two capacity 100 m3 / h ( 13 m high) And two 50 m3 / h ( 11 m) high , a total of 4 sets of purifier, respectively Huang Banzhi and white oar, dipping paper wastewater treatment. People's mill USES the six sets of processing 100 ( 15) high Purifier, processing Huang Banzhi and grey board paddles, dipping paper wastewater. Equipped with 2 sets of sludge concentration tank and dosing system, adjust the mud scraper, sludge dewatering machine and other equipment. Two engineering capacity for 7200 and 15000 respectively, with a total investment of 5. 9 million yuan and 9. 8 million yuan respectively, covers an area of 1600 and 2800. Using EWP high efficiency wastewater purifier, guangzhou's city a cardboard-box factory sewage after treatment to the paper production, makes the plant reaches 1 tons of water to build the advanced level of one ton of paper. 2 process

contrast test process to increase the scraping mud li, regulating pool pump after dosing system, sludge dewatering machine and other equipment.

3 running effect EWP high efficiency wastewater purifier technology characteristic is without any filter material or filler, while the use of advanced mode of production sewage generated after reaction with flocculant flocculation sediment deposited adsorption filtration of straight into the sewage purification. Its key is EWP high efficiency wastewater purifier can change the flocculating sediment in sewage form stable fluidization, today pollutants have the effect of activated carbon, and can be facilitated by flocculating sediment of fresh into old flocculating sediment discharge, always keep the purifier governance effect. It is primary physicochemical treatment technique, it is floating, precipitation and other similar process 10 - to improve efficiency 20%.

after more than three years of operation, even though the water concentration change is bigger, but the water is still better and stable. Table 2 monitoring results show that COD can reach to drop rate is 92. 5%，BOD78. 5%，SS98. 9%, reach the design request of the project, and the national standard. Direct operating cost ( Agent cost is 0. 25 yuan, power consumption is 0. 2 c) To zero. 38 yuan/tons of water.