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Integrated treatment process of active printing and dyeing waste water

A technology of printing and dyeing wastewater and treatment process, which is applied in textile industry wastewater treatment, multi-stage water treatment, anaerobic digestion treatment, etc., can solve the problem of low energy consumption, achieve small dispersion, good stability, and enhance complexation Effect

Inactive Publication Date: 2019-01-18
DONGJIANG ENVIRONMENTAL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In order to solve the above technical problems, the present invention provides an integrated treatment process for active printing and dyeing wastewater, which solves the problem of advanced treatment of high-concentration printing and dyeing wastewater, low energy consumption, good purification effect, and continuous treatment.

Method used

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  • Integrated treatment process of active printing and dyeing waste water
  • Integrated treatment process of active printing and dyeing waste water
  • Integrated treatment process of active printing and dyeing waste water

Examples

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Embodiment 1

[0031] The integrated treatment process I of embodiment 1 reactive printing and dyeing wastewater

[0032] Step 1. Physicochemical pretreatment: Filter the printing and dyeing wastewater through the grid to remove the suspended solids and floating solids with large particles, then pump it into the adjustment tank and adjust its pH;

[0033] Step 2, biochemical treatment: the effluent treated in step 1 passes through aerobic aeration tank and anaerobic bioreactor to reduce chemical oxygen demand, biochemical oxygen demand and ammonia oxygen concentration;

[0034] Step 3, flocculation and sedimentation treatment: pump the effluent treated in step 2 into the physical and chemical sedimentation tank, and add composite flocculant I to further remove suspended solids, colloidal substances, organic matter and decolorization in wastewater; composite flocculant I is determined by molar ratio It is compounded by (2-5): (5-8) anionic polyelectrolyte and water-soluble cationic flocculant...

Embodiment 2

[0041] The integrated treatment process II of embodiment 2 active printing and dyeing wastewater

[0042] Step 1. Physicochemical pretreatment: Filter the printing and dyeing wastewater through the grid to remove the suspended solids and floating solids with large particles, then pump it into the adjustment tank and adjust its pH;

[0043] Step 2, biochemical treatment: the effluent treated in step 1 passes through aerobic aeration tank and anaerobic bioreactor to reduce chemical oxygen demand, biochemical oxygen demand and ammonia oxygen concentration;

[0044] Step 3, flocculation and sedimentation treatment: pump the effluent treated in step 2 into the physical and chemical sedimentation tank, and add composite flocculant II to further remove suspended solids, colloidal substances, organic matter and decolorization in wastewater; composite flocculant II is determined by molar ratio It is compounded by (2-5): (5-8) anionic polyelectrolyte and water-soluble cationic flocculan...

Embodiment 3

[0051] The integrated treatment process III of embodiment 3 active printing and dyeing wastewater

[0052] Step 1. Physicochemical pretreatment: Filter the printing and dyeing wastewater through the grid to remove the suspended solids and floating solids with large particles, then pump it into the adjustment tank and adjust its pH;

[0053] Step 2, biochemical treatment: the effluent treated in step 1 passes through aerobic aeration tank and anaerobic bioreactor to reduce chemical oxygen demand, biochemical oxygen demand and ammonia oxygen concentration;

[0054] Step 3, flocculation and sedimentation treatment: pump the effluent treated in step 2 into the physical and chemical sedimentation tank, and add composite flocculant III to further remove suspended solids, colloidal substances, organic matter and decolorization in wastewater; composite flocculant III is determined by molar ratio It is compounded by (2-5): (5-8) anionic polyelectrolyte and water-soluble cationic floccu...

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Abstract

The invention discloses an integrated treatment process of active printing and dyeing waste water. The integrated treatment process comprises the following steps: physically and chemically pretreatingthe printing and dyeing waste water, performing biochemical treatment, performing flocculation and precipitation treatment, performing advanced catalytic oxidation treatment, and performing reverse osmosis treatment. Compared with the prior art, the waste water is gradually purified step by step, large-particle suspended solids in the waste water are successively removed, then organic matters inthe waste water are decomposed, then a composite flocculating agent and an organic dye form a complexing effect to realize decolorizing, and the decomposition of the organic matters in the sewage canbe promoted by virtue of the synergistic effect of photocatalysis and Fenton oxidation; the composite flocculating agent firstly forms a polyelectrolyte complex and then reacts with the active dye tomake complexing precipitation reaction, and destabilization and flocculation can be performed; the water-soluble cationic flocculating agent is introduced into a thiourea link, and is easy to hydrolyze to generate a great amount of floccules; and modified polysaccharide is introduced as anion polyelectrolyte which has the synergistic effect with the water-soluble cationic flocculating agent, so that the complexing effect with the organic dye can be improved, and the decolorizing rate can be significantly improved.

Description

technical field [0001] The invention relates to the field of organic wastewater treatment, in particular to an integrated treatment process for reactive printing and dyeing wastewater. Background technique [0002] my country is a big country in the textile printing and dyeing industry. The textile printing and dyeing industry not only consumes a lot of water, but also discharges a lot of wastewater. According to statistics, the average production of 1kg product requires consumption of 0.2-0.5m 3 At present, the total discharge of printing and dyeing wastewater in my country accounts for about 35% of the total industrial wastewater. Printing and dyeing wastewater is difficult to treat because of its complex composition, high chroma, and high organic matter content, and the fact that various dyes and auxiliaries used in the printing and dyeing process are highly toxic and difficult to be biodegraded. In recent years, with the rapid development of the printing and dyeing ind...

Claims

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Application Information

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IPC IPC(8): C02F9/14C02F103/30
CPCC02F1/001C02F1/30C02F1/441C02F1/5263C02F1/54C02F1/56C02F1/66C02F1/722C02F1/725C02F3/02C02F3/28C02F3/30C02F9/00C02F2001/007C02F2103/30C02F2301/08C02F2305/026C02F2305/10
Inventor 谈际满洪海宣蓉缪松峰
Owner DONGJIANG ENVIRONMENTAL
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