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Deep denitrification and decolorization system for chemical wastewater

A technology for deep denitrification and chemical wastewater, applied in the direction of water pollutants, water/sewage treatment, chemical instruments and methods, etc., can solve the problems of slow decolorization effect and difficulty in reaching the standard of effluent, and achieve low removal rate and avoid clogging Effect

Pending Publication Date: 2021-09-07
ANHUI ZHONGHUAN ENVIRONMENTAL PROTECTION TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Studies have shown that when biological methods are used to treat industrial wastewater containing chroma, only a small part of the dye can be removed by biodegradation and adsorption by activated sludge, the decolorization effect is extremely slow, and the effluent is difficult to meet the standard

Method used

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  • Deep denitrification and decolorization system for chemical wastewater
  • Deep denitrification and decolorization system for chemical wastewater
  • Deep denitrification and decolorization system for chemical wastewater

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] Such as figure 1 As shown, a chemical wastewater deep denitrification and decolorization system includes a pretreatment pool 1 and a bioelectrochemical treatment pool 2, and a partition 11 is arranged in the pretreatment pool, and the partition 11 divides the pool body of the pretreatment pool 1 It is divided into two flocculation tanks 12 and sedimentation tanks 13 with the upper part connected and the lower part separated. The lower part of the adjacent flocculation tanks 12 is connected. Connected, the upper end of the sedimentation tank 13 is provided with a water outlet 15, and the lower end is provided with a mud discharge port 16, and an inverted cone is formed between the body of the sedimentation tank 13 and the mud discharge port 16 at the bottom;

[0033] The pool body of the bioelectrochemical treatment pool 2 is sequentially divided into a water inlet area 21, a supporting area 22, and a water outlet area 23 from top to bottom, and a through-hole partition ...

Embodiment 2

[0036] Attached below figure 1 Describe the motion process of the system:

[0037]The wastewater to be treated enters the flocculation tank 12 through the wastewater inlet pipe 14, and a flocculant is added to the flocculation tank 12. Under the action of the agitator at the bottom of the flocculation tank, the flocculant reacts quickly with the SS in the water body. The first flocculation tank The flocculant added in 12 is iron salt, and the flocculant added in the second flocculation tank 12 is PAM. Quickly form flocs, and the flocs quickly settle at the bottom of the sedimentation tank 13 without power to form sludge, and the sludge can be discharged through the sludge discharge port 16;

[0038] The upper part of the sedimentation tank 13 is provided with a water outlet 15, and the sewage treated by the pretreatment tank 1 enters the bioelectrochemical treatment tank 2 through the water outlet 15, and the organic matter in the sewage is decomposed by the microorganisms on...

Embodiment 3

[0041] use figure 1 The wastewater treatment system shown is used as the treatment group; other systems are the same as those of the treatment group, and a control group is set at the same time. The wastewater treatment system in the control group is basically the same as the treatment group, except that the anode electrode, cathode electrode and conductive wire are not set. The water quality standards of the wastewater to be treated are as follows in Table 1:

[0042] Table 1 Water quality standards of wastewater to be treated

[0043]

[0044] The reactors of the treatment group and the control group were all operated continuously for 30 days, and the removal rate of relevant indicators was shown in the following table 2 with the change of the number of days of reactor operation:

[0045] Table 2 The removal rate of each water quality in the control group and the experimental group

[0046]

[0047] In order to verify the denitrification and decolorization effect of ...

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Abstract

The invention belongs to the technical field of sewage treatment, and particularly relates to a deep denitrification and decolorization system for chemical wastewater. The system comprises a pretreatment tank and a bioelectrochemical treatment tank; the pretreatment tank comprises a flocculation tank and a sedimentation tank which are used for carrying out primary sedimentation and impurity separation on wastewater, and a chemical flocculation separation technology is used as pretreatment to reduce the sewage treatment load of an ecological bed; the bioelectrochemical treatment tank is mainly composed of a supporting area, a cathode electrode, an anode electrode, plants, an aeration disc, a drainage and backwashing water outlet, a partition plate and the like; by adopting a bioelectrochemical enhanced ecological bed technology, organic matters in sewage are decomposed by microorganisms at the anode electrode; and decomposed protons and electrons can reach the cathode electrode in a flow diffusion and external circuit-external resistor-external circuit transfer mode, the cathode electrode serves as an electron donor to participate in the reduction process of pollutants, and the good removal effect on non-biodegradable pollutants such as dye, COD and total nitrogen is achieved.

Description

technical field [0001] The invention relates to a deep denitrification and decolorization system for chemical wastewater, which belongs to the technical field of sewage treatment. Background technique [0002] my country is a big country in the production and application of dyestuffs. In recent years, due to the development needs of dye production enterprises and downstream industries, including printing and dyeing, printing, paint, leather first-class cosmetics and other industries, the demand for dyes has increased year by year. According to the survey, in the dye production process, about 2% of the products enter the waste water without recycling; in the printing and dyeing process, this ratio increases to 10%. Large losses, especially a large amount of synthetic dyes enter the environment with the discharge of industrial wastewater, which has a serious impact on environmental safety. [0003] The main characteristics of industrial wastewater such as printing and dyeing...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F9/14C02F101/30C02F101/16
CPCC02F9/00C02F2101/308C02F1/56C02F1/5236C02F3/005C02F2303/14C02F3/32C02F2001/007C02F2101/16
Inventor 宋永莲郑侠杨丹丹刘俊张彬彬
Owner ANHUI ZHONGHUAN ENVIRONMENTAL PROTECTION TECH CO LTD
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