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

A zero-discharge treatment method for high-hardness and high-salt wastewater

A treatment method and high-salt technology, applied in the field of water treatment, can solve the problems of inability to achieve high-level reuse and zero discharge, and achieve the effects of improving recycling rate, stable effluent quality, and solving environmental pollution.

Active Publication Date: 2016-04-13
ZHEJIANG CREATION ENVIRONMENT TECH
View PDF11 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The invention patent with the application number 201210534825.2 discloses a method of combining biochemistry and physicochemistry to treat high-hardness and high-salt wastewater, but it still cannot meet the requirements of advanced reuse and zero discharge

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 zero-discharge treatment method for high-hardness and high-salt wastewater

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0021] Combine below figure 1 The present invention will be further described with specific embodiments.

[0022] A zero-discharge treatment method for high-hardness and high-salt wastewater, using such as figure 1 The device shown comprises the following steps:

[0023] 1) The high-hardness wastewater discharged by the paper mill meets the standard, the main water quality indicators are COD=60-80mg / L, hardness=800-1000, conductivity=5000-6000uS / cm, and the hardness and suspended solids are reduced by the first-stage pretreatment device 1 Content and COD pretreatment, the pretreatment device in the first section adopts pretreatment multi-media filter 19, coagulation and dosing slant plate sedimentation, and ozone treatment combination. The main water quality indicators after pretreatment are: COD=30mg / L, hardness= 200;

[0024] 2) The wastewater pretreated in step 1) enters the ultrafiltration device 2 of the first section and the reverse osmosis device 4 of the first secti...

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

PropertyMeasurementUnit
chemical oxygen demand (mass)aaaaaaaaaa
hardnessaaaaaaaaaa
hardnessaaaaaaaaaa
Login to View More

Abstract

The invention relates to the technical field of water treatment, and particularly relates to and discloses a treatment method for zero discharge of high-hardness high-salinity wastewater. The method comprises the steps of pretreating; ultrafiltering in a first section; carrying out reverse osmosis treatment in the first section; carrying out enhancing treatment on reverse osmosis concentrate in the first section; filtering by multiple mediums, softening, and ultrafiltering and carrying out reverse osmosis treatment in a second section; passing the reverse osmosis concentrate in the second section through a nano-filtration device; passing nano-filtration permeate through an electrodialysis device; introducing fresh water generated by the electrodialysis device into ultrafiltration water of the second section, and taking concentrate in the electroldialysis device for regenerating a softener; feeding nano-filtration concentrate into an evaporation system to obtain a solid matter, and taking water in reverse osmosis treatment of the first and second sections as reuse water. According to the treatment method for zero discharge of high-hardness high-salinity wastewater, physicochemical treatment, membrane integration technology and evaporation technology are combined, so that the problem that the environment is polluted by high-hardness high-salinity concentrate discharge can be effectively solved, the requirement for zero discharge can be met, the effluent water quality is stable, and the water utilization rate is improved.

Description

technical field [0001] The invention relates to the technical field of water treatment, in particular to a zero-discharge treatment method for high-hardness and high-salt wastewater. Background technique [0002] Salt wastewater, especially industrial wastewater with high hardness, has complex components and is therefore difficult to treat. Such as papermaking, printing and dyeing, citric acid and other industries, due to the specific requirements of the production process, the salinity and hardness of the discharged wastewater are relatively high, which increases the difficulty of treatment. These industries are large water users, and there are two main treatment methods for their production wastewater. One is to discharge directly after traditional physical, chemical and biochemical treatment. The organic matter and high salt in the saline wastewater have a greater impact on the environment; Partial reuse is achieved through membrane treatment, thereby reducing water cons...

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 Patents(China)
IPC IPC(8): C02F9/10
CPCC02F1/04C02F1/048C02F1/42C02F1/441C02F1/442C02F1/444C02F1/4693C02F1/72C02F9/00
Inventor 洪海云包进锋
Owner ZHEJIANG CREATION ENVIRONMENT TECH
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