Method for treating heavy metal industrial sewage

A technology for industrial wastewater and treatment methods, which is applied in metallurgical wastewater treatment, water/sewage treatment, neutralized water/sewage treatment, etc., can solve the problems of large area occupied by the sedimentation system, limited separation effect, long sedimentation time, etc., to achieve The effect of low operating cost, reduced equipment footprint and simple process

Inactive Publication Date: 2010-09-15
JIANGXI JDL ENVIRONMENTAL PROTECTION CO LTD
View PDF1 Cites 31 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Metal polishing and printed circuit board wastewater is characterized by heavy metal ions: the content of hexavalent chromium, cadmium, lead, zinc, copper, etc. is quite high. The commonly used treatment methods mainly include chemical precipitation, ion exchange, electrolysis, adsorption, Solvent extraction method, evaporation concentration method and biological method, relatively speaking, the most used at present is: chemica

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
  • Method for treating heavy metal industrial sewage
  • Method for treating heavy metal industrial sewage
  • Method for treating heavy metal industrial sewage

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0018] Refer to attached figure 1 , in the treatment method of a kind of heavy metal industrial waste water of the present invention, after the waste water enters the adjustment tank, balance water quality and water quantity; The aeration pipe of the aeration pipe is used to aerate the wastewater to be treated intermittently or regularly at a frequency of 1 to 3 times a day, 1 to 4 hours each time, to prevent anaerobic odor of the wastewater, and to uniform the water quality and quantity of the wastewater to be treated, ensuring The water quality stability of the system feed water, the adjustment time of the adjustment tank is determined according to the production characteristics, and the general design residence time is 6 to 8 hours;

[0019] The supernatant obtained in step a is injected into the reaction tank, and the heavy metal ions in the waste water are chemically reacted by adding medicaments. The medicaments can be ferrous sulfate, sodium bisulfite, sodium hypochlori...

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 method for treating heavy metal industrial sewage, sequentially comprising the following steps of: a, infusing sewage to be treated to a regulating tank, and staying for 6-8 hours; b, infusing supernate obtained in the step a to a reaction tank, adding medicament to perform chemical treatment for heavy metal ions; c, infusing supernate obtained in the step b to a pH adjusting tank and adjusting pH value to 9.0-10.0; d, infusing sewage obtained by the step c to a flocculation tank, adding aluminum polychlorid based on the standard of 5-10mg/L, reacting for 15-20 minutes to perform flocculoreaction; after introducing the supernate to the concentration tank, infusing the sewage in the tank at the flow rate of 3-5m/s by using a centrifugal pump to a pipe-type microfiltration membrane with the aperture of 0.05-20 microns, filtering the sewage and performing advanced treatment for the effluent obtained by entering a reverse osmosis system, and guiding the concentrated sewage back to the microfiltration concentration tank for circular filtration. The method has simplified steps and is particularly suitable for pre-treatment of high-concentration heavy metal ion sewage.

Description

technical field [0001] The invention relates to a method for treating waste water, in particular to a method for treating industrial waste water with high content of heavy metal ions. Background technique [0002] With the development of industrial production and urban modernization, environmental pollution is becoming more and more serious. Since water is the material basis for the survival and development of human beings, the problem of water pollution has attracted people's attention. Heavy metals are one of the main pollutants in the water environment, especially heavy metals such as mercury, cadmium, lead, chromium, nickel, etc. have significant biological toxicity, and trace concentrations can produce toxicity. Under the action of microorganisms, it will be transformed into more toxic organometallic compounds (such as methylmercury); or it will be bio-accumulated and enter the human body through the food chain, causing chronic poisoning. Therefore, the effective remo...

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
IPC IPC(8): C02F9/04C02F1/62C02F1/66C02F1/52C02F103/16
Inventor 廖志民杨圣云何其虎邹莲花郭景奎沈平锐王鹏杨欣龙斌周佳琳
Owner JIANGXI JDL ENVIRONMENTAL PROTECTION CO LTD
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