Advanced treatment method of organic pigment waste water

An advanced treatment and organic pigment technology, applied in water/sewage treatment, multi-stage water/sewage treatment, neutralized water/sewage treatment, etc., can solve the problems of poor effluent quality and high energy consumption, and achieve efficient treatment effects

Active Publication Date: 2007-07-18
江苏中宜金大环保产业技术研究院有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to the need for heating, this method consumes a lot of energy, and the quality of the effluent is poor.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] A mixed organic pigment wastewater, pH 3.5, COD concentration 8000mg / L, chroma 5000. Firstly, electrolyze the pigment wastewater, adjust pH6, control voltage 7V, current 30A, normal temperature, electrolysis time 15min. The chromaticity removal rate of the pigment wastewater after electrolysis is 75%, the diluted COD concentration is 2000mg / L, and 20mg / L of phosphate is added to enter the anaerobic UASB reactor. The properties and parameters of the granular sludge are: 60-68gVSS / L, 70 -80gSS / L, particle size 0.2-2.5mm. The hydraulic retention time of the wastewater in the reactor is 16 hours, the temperature in the reactor is kept at room temperature (16-37° C.), and the pH value is controlled at 6.8-7.8. The initial volume load of the anaerobic reactor is 0.1kgCOD / (m 3 d) When the COD removal rate reaches 85% and the operation is stable, gradually reduce the hydraulic retention time or increase the COD concentration of the influent to increase the load until the wast...

Embodiment 2

[0020] A mixed pigment wastewater, pH5, COD concentration 5000mg / L, chroma 4000. Firstly, electrolyze the pigment wastewater, adjust pH6, control voltage 7V, current 30A, normal temperature, electrolysis time 15min. For the pigment wastewater after electrolysis, dilute the COD concentration at 1500mg / L, adjust the pH to 6.8-7.8, add 15mg / L of phosphate, and enter the EGSB reactor. The properties and parameters of the granular sludge are: 60-68gVSS / L, 70- 80gSS / L, particle size 0.2-2.5mm. The hydraulic retention time of the wastewater in the reactor is 12 hours, and the temperature in the reactor is kept at room temperature (16-37° C.). The initial volume load of the anaerobic reactor is 0.5kgCOD / (m 3 d) When the COD removal rate reaches 85% and the operation is stable, gradually reduce the hydraulic retention time or increase the COD concentration of the influent to increase the load until the wastewater is directly used as the influent, and the load increases to 22-25kgCOD / ...

Embodiment 3

[0022] A mixed pigment wastewater, pH4, COD concentration 2000mg / L, chroma 2000. Firstly, electrolyze the pigment wastewater, adjust pH5, control voltage 8V, current 30A, normal temperature, electrolysis time 20min. For the pigment wastewater after electrolysis, dilute the COD concentration at 1000-1500mg / L, adjust the pH to 6.8-7.8, add 10-15mg / L of phosphate, and enter the IC reactor. The properties and parameters of the granular sludge are: 60-68gVSS / L, 70-80gSS / L, particle size 0.2-2.5mm. The hydraulic retention time of the waste water in the reactor is 10h, and the temperature in the reactor is kept at room temperature (16-37° C.). The initial volume load of the anaerobic reactor is 0.5kgCOD / (m 3 d) When the COD removal rate reaches 85% and the operation is stable, gradually reduce the hydraulic retention time or increase the COD concentration of the influent to increase the load until the waste water is directly used as the influent, and the load increases to 25kgCOD / ...

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Abstract

This invention discloses an advanced treatment method of organic pigment waste water, which belongs to organic waste water disposal technique domain. Its steps include: electrolyze pigment waste water, dilute electrolyzed pigment waste water to COD density 1000-2000mg/L, use it as reactor water, introduce in anaerobic particle bed reactor, add 10-20mg/L phosphate into waste water, turn on initial volume load of anaerobic particle bed reactor, gradually decrease, increase load by decreasing hydraulic detention time or increasing importing water COD density until effluent can be directly used as feeding water. Anaerobic effluent and air current directly enter aerobic reactor from reactor bottom. Processed feeding water can be directly volleyed. On the basis of organic waste water characteristics of high COD, high chroma, and high salinity, this invention can quickly and high-performance process. Feeding water can achieve first class emission standard of 'integrated wastewater discharge standard' (GB8978-96). Wherein COD is l lower than 50mg/L. Chroma is lower than 50 times.

Description

technical field [0001] This patent relates to the technical field of organic wastewater treatment, more specifically, a treatment method for organic pigment wastewater. Background technique [0002] Pigments are divided into inorganic pigments and organic pigments. Inorganic pigments mainly include carbon black and metal oxides and salts such as iron, barium, zinc, cadmium, lead and titanium. Organic pigments can be divided into monoazo, disazo, lake, phthalocyanine, quinacridone and Several structural types such as fused ring pigments. Azo pigments are the category with the most varieties and the largest output among organic pigments. Organic pigments refer to a class of pigments composed of organic compounds for color and other series of pigment properties. The difference between organic pigments and dyes is that they have no affinity with the chromosomes, and the organic pigments can only be attached to the surface of the object through adhesives or film-forming substa...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F9/14C02F1/461C02F1/66C02F3/30
Inventor 任洪强丁丽丽秦扬尤隽
Owner 江苏中宜金大环保产业技术研究院有限公司
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