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A printing and dyeing wastewater treatment method enhanced by changing-constant alternating magnetic field

A printing and dyeing wastewater and magnetic field strengthening technology, which is applied in textile industry wastewater treatment, water/sewage treatment, chemical instruments and methods, etc., can solve the problems of unstable operation of the reactor at low temperature, poor biological toxicity inhibition effect, low biochemical reaction efficiency, etc. , to achieve the effect of improving the degradation rate and biological toxicity inhibition efficiency, simple and convenient operation, and promoting the strengthening effect

Active Publication Date: 2020-09-11
JIANGSU PROVINCIAL ACAD OF ENVIRONMENTAL SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0012] Aiming at the defects of low biochemical reaction efficiency in printing and dyeing wastewater treatment under low temperature conditions, poor biological toxicity inhibition effect leading to substandard effluent, and unstable operation of the reactor at low temperature, the present invention aims to provide a printing and dyeing system enhanced by changing-constant alternating magnetic fields. Wastewater treatment method

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  • A printing and dyeing wastewater treatment method enhanced by changing-constant alternating magnetic field

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Effect test

Embodiment 1

[0037] This embodiment provides a method for treating printing and dyeing wastewater enhanced by a variable-constant alternating magnetic field, the steps of which are as follows:

[0038] a) Sludge and sewage domestication treatment: Install a magnetic field strengthening device around the reactor, place the reactor in the coil of the magnetic field strengthening device, inoculate the reactor with activated sludge at a low temperature of 10°C, and the sludge concentration is 5600mg / L, the influent organic load is 0.07kg / (m 3 For the simulated printing and dyeing wastewater in d), continuous aeration and stirring were carried out during the reaction period, and the stirring speed was 300r / min, so that the activated sludge and the printing and dyeing wastewater were fully mixed, and preliminary domestication and cultivation were carried out, and the mixed culture was 25 days;

[0039] b) Treatment of changing magnetic field from high to low: turn on the power, adjust the trans...

Embodiment 2

[0045] The printing and dyeing wastewater treatment method provided by this embodiment using a variable-constant alternating magnetic field enhanced, the steps are:

[0046] a) Sludge and sewage domestication treatment: Install a magnetic field strengthening device around the reactor, place the reactor in the coil of the magnetic field strengthening device, inoculate the reactor with activated sludge at a low temperature of 0°C, and the sludge concentration is 5500mg / L, the influent organic load is 0.08kg / (m 3 For the simulated printing and dyeing wastewater in d), continuous aeration and stirring are carried out during the reaction period, and the stirring speed is 400r / min, so that the activated sludge and the printing and dyeing wastewater are fully mixed, and preliminary domestication and culture are carried out, and the mixed culture is 21 days;

[0047] b) Treatment of changing magnetic field from high to low: turn on the power supply, adjust the transformer to control ...

Embodiment 3

[0053] The printing and dyeing wastewater treatment method provided by this embodiment using a variable-constant alternating magnetic field enhanced, the steps are:

[0054] a) Sludge and sewage domestication treatment: Install a magnetic field strengthening device around the reactor, place the reactor in the coil of the magnetic field strengthening device, inoculate the reactor with activated sludge at a low temperature of 4°C, and the sludge concentration is 6500mg / L, the influent organic load is 0.06kg / (m 3 For the simulated printing and dyeing wastewater in d), continuous aeration and stirring were carried out during the reaction period, and the stirring speed was 450r / min, so that the activated sludge and the printing and dyeing wastewater were fully mixed, and preliminary acclimatization was carried out, and the mixed culture was carried out for 35 days;

[0055] b) Treatment of changing magnetic field from high to low: turn on the power supply, adjust the transformer t...

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Abstract

The invention discloses a printing and dyeing wastewater treatment method enhanced by a variable-constant alternating magnetic field, and belongs to the field of industrial wastewater purification. The processing steps of the method are as follows: a) sludge and sewage acclimation treatment: activated sludge and sewage are thoroughly mixed for preliminary acclimation and culture; b) high to low variable magnetic field treatment; c) constant magnetic field treatment; d) low to high variable magnetic field treatment; and at the same time the influent organic loading is gradually increased, and acclimation is carried out for the activated sludge; e) the pre-treated printing and dyeing wastewater is added into a reactor in order to form a variable-constant alternating magnetic field-microbialenhanced treatment system. The high magnetic field intensity is 450mT-550mT; the low magnetic field intensity is 350mT-450mT; this method significantly improves the degradation rate and biological toxicity inhibition efficiency of the printing and dyeing wastewater organic matters of the reactor under the low temperature condition; and the operation is simple and convenient, and the operation is easy to promote.

Description

technical field [0001] The invention belongs to the field of industrial wastewater purification, and more specifically relates to a method for intensified treatment of industrial wastewater by using a variable-constant alternating magnetic field, which is mainly applicable to the biointensified treatment of printing and dyeing wastewater under low temperature conditions. Background technique [0002] Printing and dyeing wastewater has a large amount of water, high chroma, and high content of refractory organic matter. The wastewater mainly contains dyes (10% to 20% of dyes are discharged into the wastewater during the dyeing process), pulp, auxiliaries, acids and bases, and fiber impurities. and inorganic salts and other substances; after biochemical treatment, the components of printing and dyeing wastewater are more complex, and the nitro and amine compounds in the dye structure, the dissolved organic matter (DOM) produced after degradation, and heavy metal elements such as...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F3/34C02F103/30
CPCC02F1/485C02F3/34C02F3/342C02F2103/30
Inventor 牛川吴俊锋凌虹王连军
Owner JIANGSU PROVINCIAL ACAD OF ENVIRONMENTAL SCI
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