Papermaking wastewater treatment method

A treatment method and technology for papermaking wastewater, which is applied in the fields of processing wastewater treatment, water/sewage multi-stage treatment, water/sludge/sewage treatment, etc., and can solve problems such as difficult wastewater compliance, refractory macromolecular substances, and large loads , to achieve the effects of reduced energy consumption, improved pollutant degradation rate, and long service life

Inactive Publication Date: 2015-06-17
NORTH CHINA ELECTRIC POWER UNIV (BAODING)
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  • Application Information

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Problems solved by technology

However, sometimes pulping wastewater has high pollutant content, heavy load, and a large number of biodegradable macromolecules, so it is difficult for wastewater to meet the standard after traditional treatment.

Method used

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  • Papermaking wastewater treatment method

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Embodiment Construction

[0035] After the papermaking wastewater enters the storage tank, it will be treated in the following steps:

[0036] 1) Filtration: Use a pump to pump the wastewater in the storage tank into the primary filter, and after being filtered and separated by a 70-mesh sieve, the filtrate enters the

[0037] Fine filter, after being filtered and separated by 130 mesh sieve, the filtrate enters the air washing regulating tower;

[0038] 2) Air washing and pH adjustment: the coal-burning exhaust gas is sent from the bottom to the air washing adjustment tower by the induced draft fan, and flows from bottom to top, so that the acid gas SO in the flue gas 2 Neutralize with the alkaline substances in the wastewater to adjust and reduce the pH of the wastewater; at the same time, the soot particles in the flue gas absorb fine suspended matter such as short fibers in the wastewater to form settleable particles, which are then filtered through a filter; the filtrate enters Flocculation tank;...

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Abstract

The invention discloses a papermaking wastewater treatment method. The method comprises the steps of filtration, gas washing, pH adjustment, flocculating precipitation, decoloring, advanced oxidation and plasma disinfection. The method disclosed in the invention has substantially higher pollutant removal ability than the prior art; and ultraviolet light is introduced into a three dimensional electrode/electro-Fenton reaction system, and an anode plate with an ultraviolet photocatalysis performance and a particle electrode are adopted to substitute traditional electrodes, so the photoelectro-synergistic catalysis reaction of the three dimensional electrode/electro-Fenton reaction system is carried out by using ultraviolet light, the energy consumption of the three dimensional electrode/electro-Fenton reaction system is reduced, a synergistic catalytic oxidation effect is generated, and organic pollutions are efficiently and rapidly degraded. Fire coal flue gas waste is used to purify the papermaking wastewater, the acidic gas SO2 in the flue gas is used to neutralize in order to remove alkaline substances in the wastewater, and flue dust particles in the flue gas are used to remove short fibers and other suspension in the wastewater in order to realize treatment of wastes by using other wastes. Organic matters and other pollutants contained in water are effectively removed through a plasma discharge technology.

Description

technical field [0001] The invention relates to a treatment method for papermaking wastewater, which belongs to the field of water treatment in environmental protection. Background technique [0002] The paper industry occupies a certain position in the national economy, and the consumption level of paper and cardboard is one of the important symbols to measure the level of modernization and civilization. At the same time, it is well known that the paper industry is a major water polluter. Therefore, in order to control pollution and protect the environment, it is urgent to solve the problem of coordinated development of the paper industry and environmental protection. [0003] The pulping rate of general chemical pulping is about 45%-50%, that is, 45%-50% of the fiber raw materials will become waste in the pulping process. Even though the pulping rate of BCTMP (bleached chemical mechanical pulp) and APMP (alkaline hydrogen peroxide chemical mechanical pulp) which are now ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F9/08C02F103/28
Inventor 张一梅聂宇何理陆骏
Owner NORTH CHINA ELECTRIC POWER UNIV (BAODING)
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