A kind of treatment method of high sulfate organic waste water

A technology for organic waste water and high sulfate content, applied in water/sewage multi-stage treatment, water/sludge/sewage treatment, chemical instruments and methods, etc., can solve problems such as troublesome operation and maintenance, large equipment investment, and difficulty in implementation. Achieve the effect of reducing the salinity requirement of influent water, simple equipment and low cost

Inactive Publication Date: 2011-11-30
NANCHANG HANGKONG UNIVERSITY
View PDF1 Cites 22 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] At present, the relevant desalination methods mainly include evaporation, membrane separation, ion exchange, electrodialysis, etc., which are sometimes difficult to implement due to reasons such as large energy consumption, large equipment investment, and troublesome operation and maintenance.

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
  • A kind of treatment method of high sulfate organic waste water

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0021] The specific implementation process is as follows:

[0022] 1. Cooling crystallization, solid-liquid separation

[0023] SO in the wastewater 4 2- The content is about 212 000 mg / L, the COD concentration is about 18 000 mg / L, and the COD / SO 4 2- <0.1, the cooling crystallization process temperature is 3-6 ℃, and the cooling time is 4-6 h. Solid-liquid separation of sulfate crystals and sulfate wastewater is carried out, and the obtained salt is recycled. The wastewater is cooled and crystallized repeatedly until no crystals are precipitated. During the implementation of the invention, the number of cooling crystallization times was 2, and the sulfate content in the wastewater after cooling crystallization and solid-liquid separation treatment was reduced to about 96 000 mg / L, and the removal rate reached 54.7%.

[0024] 2. Fenton oxidation

[0025] Cool down the crystallized wastewater, adjust the pH with sulfuric acid, and then add Fenton's reagent FeSO 4 · H ...

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 belongs to the field of wastewater treatment, and provides a treatment method of high-sulfate organic wastewater. The treatment method is characterized by being achieved through the following steps: A, cooling crystallization and solid-liquid separation; B, Fenton oxidation; and C, sulfate-resistant biological treatment; and the steps are specified as follows: carrying out cooling crystallization on the organic wastewater containing high-concentration sulfates to form solid and liquid two phases, carrying out solid-liquid separation, carrying out resource utilization on the solid-phase sulfate hydrate crystals, and repeating the cooling crystallization of the water phase until no crystal precipitates; carrying out Fenton oxidation on the sulfate wastewater pretreated by cooling crystallization; and mixing the sulfate wastewater treated by Fenton oxidation with low-concentration domestic sewage according to a certain ratio, and introducing the mixture into a sulfate-resistant SBR (sequencing batch reactor) activated sludge system for biological treatment. By utilizing a multiple-method combined manner, the treatment method provided by the invention has the advantages of economy, high efficiency, flexibility, no secondary pollution, good operability, high adaptability and good prospects for industrial application, and is suitable for the qualified treatment of the high-sulfate organic wastewater.

Description

technical field [0001] The invention relates to a wastewater treatment method, in particular to a treatment method for high sulfate organic wastewater. Background technique [0002] Food production (syrup, seafood, edible oil, etc.), pharmaceutical, paper, chemical and other industrial production processes will produce high sulfate organic wastewater. In addition to the high concentration of sulfate itself, this kind of wastewater also contains a large amount of toxic and refractory dissolved organic substances, such as benzene ring compounds and hydrocarbons. The discharge of this kind of wastewater will bring serious environmental pollution. [0003] At present, at home and abroad, anaerobic digestion technology is mostly used as the preferred method for treating sulfate organic wastewater. However, the presence of sulfate in wastewater can have a significant impact on anaerobic conditions, and theoretical studies have shown that wastewater COD / SO 4 2- value and influen...

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): C02F9/14
Inventor 杨春平张晓明单文伟罗胜联何慧军彭敏刘勇刚金聪颖易斌李小豹
Owner NANCHANG HANGKONG UNIVERSITY
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

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

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap