A kind of enzyme precatalysis-magnetoacoustic catalytic oxidation advanced water treatment method

A catalytic oxidation and pre-catalysis technology, which is applied in the field of water pollution prevention and control research, can solve the problems that small molecular organic matter is difficult to completely decompose, it is difficult to meet the emission standards stably, and the treatment cost is high, so as to reduce the treatment cost and oxidation reaction rate. and high oxidation capacity, the effect of reducing secondary pollution

Active Publication Date: 2020-04-07
南京神克隆环保科技有限公司
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AI Technical Summary

Problems solved by technology

The conventional catalytic oxidation process only decomposes part of the pollutants in the wastewater into small molecular organic substances, and these small molecular organic substances (alcohols, aldehydes, carboxylic acids, etc.) are difficult to completely decompose, and some complex organic substances, such as benzene and aromatic hydrocarbon derivatives Difficult to degrade
[0006] Before the present invention, there were still two major problems in implementing advanced treatment for this type of "three-antibody" wastewater. One was that it was difficult to stably meet the increasingly stringent discharge standards; the other was that the treatment cost remained high.

Method used

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  • A kind of enzyme precatalysis-magnetoacoustic catalytic oxidation advanced water treatment method
  • A kind of enzyme precatalysis-magnetoacoustic catalytic oxidation advanced water treatment method
  • A kind of enzyme precatalysis-magnetoacoustic catalytic oxidation advanced water treatment method

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Effect test

Embodiment 1

[0044] Embodiment 1: printing and dyeing wastewater

[0045] A comprehensive sewage treatment plant in Zhejiang, in which printing and dyeing wastewater accounted for 75%, chemical wastewater accounted for 15%, and domestic wastewater accounted for 10%, with a daily treatment capacity of 320,000 tons. The effluent from the secondary settling tank after biochemical treatment is COD130~160mg / L, the chroma is relatively heavy, and the conductivity is greater than 4000us / cm. There are 14 kinds of organic pollutants with a larger molecular weight exceeding 1%, accounting for 88.83% in total, and the content of aniline organic pollutants is 34.79%. The present inventor has carried out the pilot test of enzyme precatalysis-magnetoacoustic catalytic oxidation advanced water treatment method to this waste water, has obtained good treatment effect, the index degradation effect such as COD, TOC, chromaticity, anilines is obvious, and effluent water quality index meets The GB18918-2002 G...

Embodiment 2

[0067] Embodiment 2: pharmaceutical wastewater

[0068] A sewage treatment plant in Shijiazhuang has a daily water treatment capacity of 100,000 tons. The source of advanced treatment wastewater is the upstream pharmaceutical enterprise wastewater and urban domestic sewage. Finally, the effluent is required to meet the first-level A standard of the urban sewage treatment plant pollutant discharge standard (GB18918-2002). The original advanced treatment of the plant used the ozone / activated carbon filter process, which failed to reach the standard after a period of operation, and with the adsorption and saturation of activated carbon, the effluent effect became worse. The influent water quality of the plant is complex and fluctuates greatly, the inert COD increases, and the biodegradability and oxidizability are greatly reduced. COD rose to 150mg / L. The ammonia nitrogen is between 5.8~7.4mg / L, and the total phosphorus is between 0.93~1.73mg / L. Aiming at the national first-cl...

Embodiment 3

[0085] Embodiment 3: chemical fiber waste water

[0086] A sewage treatment station in Xinjiang mainly treats fiber wastewater and pulp wastewater from a fiber company in Xinjiang, with a daily processing capacity of 80,000 tons. The water volume of advanced water treatment is 40,000 tons per day, and the target COD ≤ 30mg / L is treated in the reclaimed water reuse system and then reused for production, meeting the reclaimed water reuse requirements of the environmental protection department of Xinjiang Autonomous Region. After physical and chemical + biochemical (aerated activated sludge method) treatment, the COD of the biochemical effluent is now 70-120mg / L. Advanced treatment implements the enzyme-catalyzed-magnetoacoustic catalytic oxidation advanced water treatment process of the present invention.

[0087] Technical Parameters:

[0088] The daily deep water treatment scale is 40,000 tons. Enzyme precatalysis time 8min, enzyme precatalysis reactor volume 115m 3 ;The m...

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Abstract

The invention relates to an enzyme pre-catalysis-magnetosonic catalytic oxidation deep treatment method for water. According to the method, waste water subjected to physicochemical and biochemical twp-grade treatment is fed into an enzyme pre-catalysis reactor, and an SKL-composite enzyme is added to catalyze reactions; then the waste water is subjected to a multiple-potential-difference multi-metal chemical catalysis reaction; hydrogen peroxide is added to perform a strong oxidation reaction; generated hydroxy free radicals (.OH) and organic pollutants are subjected to a rapid chain type reaction, and harmful compounds are oxidized into CO2, H2O or mineral salts; objectives of degrading pollutants and fully utilizing agents are achieved; solid liquid separation is performed to remove SS; and PAM is added. The method overcomes the defects that emission standards cannot be stably met, and treating costs are at an all-time high. The method overcomes the problem that a large amount of iron sludge is generated in a traditional homogeneous Fenton reaction process, reduces secondary pollution, reduces the treating cost, and achieves catalytic pollutant degradation in a condition near a neutral condition.

Description

technical field [0001] The invention relates to the research field of water pollution prevention and control, in particular to an enzyme precatalysis-magnetoacoustic catalytic oxidation advanced water treatment method. Background technique [0002] Industrial wastewater has complex properties, high toxicity, high salinity, and low B / C. After biochemical treatment (such as A2 / O), the effluent still contains polycyclic aromatic hydrocarbons, halogenated hydrocarbons, heterocyclics, phenol, and phenol homologues. And polycyclic compounds such as naphthalene, anthracene, and benzopyrene. These pollutants belong to the "three anti-chemicals", anti-biochemical, anti-photochemical, and anti-oxidation refractory pollutants. [0003] The upgrading of industrial wastewater requires the effluent to meet the national A standard. According to the investigation of the situation after the construction and operation of each project, the conventional processes such as Fenton, ozone, activate...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F9/14
CPCC02F1/24C02F1/48C02F1/56C02F1/722C02F1/725C02F3/342C02F9/00
Inventor 田宝凤江双双程成田伟汉
Owner 南京神克隆环保科技有限公司
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