Water paper paper-making wastewater efficient treatment and comprehensive recycling method and device

A technology for papermaking and wastewater from waste paper, which is applied in the process of wastewater treatment, water/sewage multi-stage treatment, water/sludge/sewage treatment, etc. In order to improve the comprehensive treatment effect and reduce the emission

Active Publication Date: 2013-04-24
富民宝地纸业有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

It is difficult to remove soluble COD and BOD by single precipitation or air flotation treatment 5 , and single biochemical treatment is difficult to remove insoluble COD, BOD 5 and SS, and the removal rate of pollutants in a single process is low, it is difficult to meet the discharge standards stipulated by the state, and it is rarely used; the commonly used primary precipitation and chemical flocculent precipitation combined with biochemical treatment can remove a large number of refractory polymers Organic pollutants, but the adaptability of waste water volume load is low, and the discharge index after treatment is difficult to meet or can barely meet the existing national standard discharge standards; there are also metal salts added as flocculants, although the flocculation efficiency is improved, but the desalination device is not added It will cause the discharge of metal salts to exceed the standard, otherwise the treatment process will be complicated and the cost will be high
It is difficult to meet the requirements of environmental protection by single or reducing the superposition of several methods
At present, membrane ultrafiltration, reverse osmosis, electrodialysis, ion exchange and other technologies are also used to treat wastewater. Although these technologies can remove most of the pollutants in wastewater, they have the disadvantages of high treatment costs, weak water quality and water volume adaptability, and are difficult to popularize. application

Method used

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  • Water paper paper-making wastewater efficient treatment and comprehensive recycling method and device

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0048] The waste water is collected into the adjustment tank 1, and after the water quality and quantity are adjusted, the lifting pump is used to lift it to the screening device 2 to remove the fibers in it, and then inject it into the air flotation tank 3 for air flotation treatment. The scum enters the sludge tank 11, and the effluent flows into the hydrolysis acidification tank 4 Carry out hydrolysis, then the effluent enters the anaerobic tank 5 and stays for reaction for 8 hours, then enters the front aerobic tank 6 and the rear aerobic tank 7 and stays for 16 hours, performs anaerobic-aerobic treatment, and the effluent enters the sedimentation tank 8 for precipitation treatment, The settled sludge is regularly discharged into the sludge tank 11, and the supernatant is discharged into the intermediate tank 12 to adjust the water quantity and quality; the effluent from the intermediate tank 12 is injected into the oxidation reactor 13, and the ozone generated by the oxidat...

Embodiment 2

[0050] The waste water is lifted by the lifting pump to the screening device 2 to remove the fibers therein, and then injected into the air flotation tank 3 for air flotation treatment, the scum enters the sludge tank 11, the effluent flows into the hydrolysis acidification tank 4 for hydrolysis, and then the effluent enters the anaerobic tank 5 to stay React for 19 hours, then enter the front aerobic tank 6 and the rear aerobic tank 7 to stay for 53 hours, perform anaerobic-aerobic treatment, the effluent enters the sedimentation tank 8 for sedimentation treatment, and the settled sludge is regularly discharged to the sludge tank 11 , the supernatant is discharged into the intermediate pool 12 to mix the water volume and water quality; the intermediate pool 12 effluent is injected into the advanced oxidation reactor 13, and the ozone generated by the oxidation generator 20 is passed into the wastewater in the oxidation reactor 13 for oxidative decomposition for 12 hours, and th...

Embodiment 3

[0052] The waste water is lifted by the lifting pump to the screening device 2 to remove the fibers therein, and then injected into the air flotation tank 3 for air flotation treatment, the scum enters the sludge tank 11, the effluent flows into the hydrolysis acidification tank 4 for hydrolysis, and then the effluent enters the anaerobic tank 5 to stay React for 15 hours, then enter the front aerobic tank 6 and the rear aerobic tank 7 to stay for 35 hours, perform anaerobic-aerobic treatment, the effluent enters the sedimentation tank 8 for sedimentation treatment, and the settled sludge is regularly discharged to the sludge tank 11 , the supernatant is discharged into the intermediate pool 12 to adjust the water volume and water quality; the intermediate pool 12 effluent is injected into the oxidation reactor 13, and the ozone generated by the oxidation generator 20 is passed into the wastewater in the oxidation reactor 13 for oxidative decomposition for 2 hours, and the efflu...

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Abstract

The invention discloses a water paper paper-making wastewater efficient treatment and comprehensive recycling method and a device. The method comprises the steps of pre-treatment, a hydrolysis reaction, biochemical treatment, separated oxidization, aeration treatment and post-treatment; the device comprises an adjusting tank, a sieving device, an air floating tank, a hydrolysis and acidification tank, an anaerobic tank, an aerobic tank, a sedimentation tank, a clean water disinfection tank and a sludge tank; the adjusting tank, the sieving device, the air floating tank and the hydrolysis and acidification tank are connected in sequence through pipelines; the hydrolysis and acidification tank, the anaerobic tank and the sedimentation tank are communicated in sequence; the clean water disinfection tank is provided with a disinfection opening, a water discharging opening and a sludge discharging opening; and the disinfection opening is connected with a disinfection device; and the sludge discharging opening is connected with the sludge tank through a pipeline. According to the water paper paper-making wastewater efficient treatment and comprehensive recycling method and device, all the functional tanks are integrated and a comprehensive synergistic effect of each tank is expressed and the comprehensive treatment effect is improved. The valuable paper-making raw material resources are recycled, the emission amount is reduced and the output water can reach national A-grade emission standard.

Description

technical field [0001] The invention belongs to the technical field of sewage treatment equipment, further belongs to the technical field of papermaking wastewater treatment, and specifically relates to a waste paper and papermaking wastewater efficient treatment and comprehensive recycling device with simple operation and maintenance, good discharge water quality, stable and reliable process. Background technique [0002] Papermaking is one of the four great inventions of our country. With the advancement of technology, papermaking has changed from manual workshop production to automatic production line production, which has greatly improved production efficiency. Papermaking must produce waste water, even if waste paper is used to make paper. Wastewater will be discharged during beating, concentration, papermaking and other processes, as well as deinking and decolorization wastewater. Waste paper and papermaking wastewater contains pollutants such as hemicellulose, lignin, ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F9/14C02F103/28
Inventor 徐春华
Owner 富民宝地纸业有限公司
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