Heavy metal recovery process for treating low-concentration plating heavy metal wastewater

A technology for wastewater treatment and heavy metals, applied in biological water/sewage treatment, adsorption water/sewage treatment, neutralized water/sewage treatment, etc. The effect of reducing wastewater treatment costs and heavy metal sludge

Inactive Publication Date: 2018-11-02
广东世来福环保科技有限公司
View PDF5 Cites 1 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Practice has proved that the resource utilization of sludge is an inevitable way out for sludge treatment. However, more than half of the heavy metals in

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
  • Heavy metal recovery process for treating low-concentration plating heavy metal wastewater

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0010] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with specific embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.

[0011] A low-concentration electroplating heavy metal wastewater treatment heavy metal recovery process, the steps are as follows: the low-concentration heavy metal wastewater without pretreatment, which contains heavy metal ions, COD, NH4, and complexes, is pumped into the membrane treatment equipment by a pump. Membrane filtration accuracy is 0.01um to remove suspended solids, colloids, and organic matter. The effluent from the membrane equipment enters the heavy metal adsorption equipment to absorb ions. After the adsorption filter material is saturated, the ions are washed out by acid regeneration, and the ion conce...

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 heavy metal recovery process for treating low-concentration plating heavy metal wastewater. The process comprises the following steps: pumping unpretreated low-concentrationheavy metal wastewater into membrane treatment equipment by a pump, wherein the wastewater contains heavy metal ions, COD (Chemical Oxygen Demand), NH4 and complexes, and the filtering precision of the membrane is 0.01 micron; removing suspended solids, colloid and organic matters, enabling membrane equipment effluent to enter heavy metal adsorption equipment to adsorb copper ions, washing out heavy metal ions by acid regeneration after the adsorbed filter material is saturated, enabling regenerated liquid to enter metal electrolysis equipment to be electrolyzed into sheet metal to be recovered after the ion concentration reaches a certain number, returning the electrolyzed regenerated liquid to recycle, adding a new acid to supplement when the concentration is not enough, regulating the pH value of the adsorption equipment effluent to 7-8, and performing biochemical treatment to remove the heavy metals. According to the wastewater treatment process, since the heavy metals are removedby adopting an adsorption method, the amount of heavy metal sludge is reduced, the sludge treatment cost is saved, and valuable metals in the wastewater are recovered, so that recycling is realized, and the whole wastewater treatment cost is saved.

Description

technical field [0001] The invention belongs to the field of environmental protection, and more specifically relates to a heavy metal recovery process for low-concentration electroplating heavy metal wastewater treatment. Background technique [0002] Most of the existing heavy metal wastewater is treated by chemical dosing. In order to remove a small amount of heavy metals in the wastewater, a large amount of lime, ferrous, sulfide coagulant, etc. are added. The treatment cost is high, and the generated sludge is large. 100 grams of heavy metal 4,000-5,000 grams of sludge is produced. Based on a daily treatment of 1,000 tons of wastewater, the sludge produced per day is about 5 tons, and the treatment cost is 2,000-3,000 yuan per ton. After the waste treatment company collects the sludge, it is difficult to deal with heavy metals in subsequent treatment It is difficult to recycle, and the generated sludge is mostly disposed of by landfill. With the acceleration of technolog...

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): C02F9/14C25C1/00C02F101/20
CPCC02F1/28C02F1/44C02F1/66C02F3/00C02F9/00C02F2101/20C25C1/00Y02P10/20
Inventor 张生明
Owner 广东世来福环保科技有限公司
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