Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Treatment method for acidic organic chemical wastewater with high COD (chemical oxygen demand) and high sulfate radical concentration

A technology of organic chemical industry and wastewater treatment, applied in the field of environmental engineering and microbiology, can solve the problems that cannot be promoted and widely used, and achieve the effect of easy transformation, less process and cost reduction

Inactive Publication Date: 2011-09-21
ZHEJIANG UNIV
View PDF4 Cites 13 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although the above technologies have made valuable explorations on the treatment of wastewater with high organic concentration containing high sulfate radicals, they are still unable to be promoted and widely used due to their own technical limitations.

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Treatment method for acidic organic chemical wastewater with high COD (chemical oxygen demand) and high sulfate radical concentration

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] Such as figure 1 Shown is a schematic flow chart of wastewater treatment using the method of the present invention.

[0027] A chemical factory is mainly engaged in the production of cosmetic raw materials, lubricating oil additives and other products. The main pollutants in its wastewater are organic substances such as alcohols, fatty acid sodium salts and fatty acid esters. Production wastewater has complex components, high pollution load and acidity. The original process uses caustic soda to adjust the pH, which is costly, and has a large inhibition on the anaerobic stage, and the effluent is unqualified.

[0028] Adopt method of the present invention, press Ca(OH) 2 :H + Add Ca(OH) to chemical wastewater with a molar ratio of 1:2 2 , stirring the reaction, adjusting the pH value to 6.7-7.5, removing most of the sulfate and H + , after standing still for one hour, the precipitation was removed, and the supernatant was transported to the anaerobic reactor. Contr...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The invention discloses a treatment method for acidic organic chemical wastewater with high COD (chemical oxygen demand) and high sulfate radical concentration, which mainly comprises the following steps: Ca(OH)2 pretreatment, anaerobic treatment, two-stage aerobic treatment, etc. After Ca(OH)2 pretreatment of the acidic organic chemical industry wastewater to remove most of sulfate radicals and H<+>, wastewater treatment microorganism main body and operation parameter factors are controlled so as to form an anaerobic wastewater treatment method with anaerobic bacteria being dominant and an aerobic aeration treatment method mainly using halophilic and haloduric aerobic microorganism treatment, and the anaerobic wastewater treatment method and the aerobic aeration treatment method are especially suitable for treating organic chemical industry wastewater with high COD, high sulfate radical concentration and low pH value.

Description

technical field [0001] The invention belongs to the field of environmental engineering and microorganism technology, in particular to a method for treating acidic organic chemical waste water with high COD and high concentration of sulfate radicals by combining chemistry and biology. Background technique [0002] A large amount of high-concentration sulfate wastewater exists in mining, metallurgy, food and pharmaceutical industries. If the wastewater is directly discharged into the water body without treatment, it will cause a series of hazards, such as: ① Corrosion of pipes. In all kinds of water pipes, it will directly reduce the resistance of water and increase corrosion, and indirectly affect the circulation of sulfate-reducing bacteria and the spread of biological corrosion; ② Excessive sulfate radicals can cause foul odor in the water body and affect the sense of water Characters and its use; ③Excessive sulfate radicals are not conducive to crop growth and salinize the...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Applications(China)
IPC IPC(8): C02F9/14C02F3/30
Inventor 吴敏郑刚张勇朱旭芬
Owner ZHEJIANG UNIV
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com