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

Paper-making effluent purifying treatment process

A technology for pulping and papermaking and purification treatment, which is applied in anaerobic digestion treatment, chemical instruments and methods, water/sewage multi-stage treatment, etc. problems, to achieve the effect of reducing energy demand, stable operation and saving floor space

Inactive Publication Date: 2008-07-16
山东贵和显星纸业有限公司
View PDF5 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] (2) The chemical method mainly uses the oxidation-reduction properties of electrochemical or chemical agents to oxidize the organic matter in the water. The chemical method has a good treatment effect and a fast rate, but the operating cost is too high for high-concentration residual black liquor, so it is difficult to apply in practice.
[0006] The main pollutants in papermaking wastewater are macromolecular organic substances that are difficult to degrade, such as cellulose, hemicellulose, lignin, and polypentose, which have poor biodegradability, and aerobic biological treatment technology alone often fails to achieve satisfactory results.

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
  • Paper-making effluent purifying treatment process
  • Paper-making effluent purifying treatment process

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0027] The present invention is illustrated below in conjunction with accompanying drawing.

[0028]The mixed wastewater from pulping and papermaking passes through the grid to remove large pieces of mechanical impurities, collects the pulp and recovers fine fibers through the inclined screen with an aperture of 90 mesh, and then enters the air flotation device, passes through the flocculant (polyaluminum chloride with a mass concentration of 10% or It is treated with 0.1% polyacrylamide) to remove tiny suspended matter, and then enters the sedimentation tank, and adjusts the water quality to PH=6~9 through water volume, and COD4 and CO 2 , so that the water quality is purified, the operating condition is that the volume load is 3.0-5.0kgCOD / (m 3 .d), using normal temperature anaerobic digestion, the total residence time is 24-30h, and the average sludge concentration (MLVSS) is 30-40g / L. The effluent from the anaerobic reactor enters the anoxic tank, and the dissolved oxygen...

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 present invention is paper-making effluent purifying treatment process including hydrolyzing acidification, anaerobic biological treatment, anoxia treatment, aerobic biological treatment and aerobic biofilter treatment mainly. The present invention has low treating cost, low power consumption, capacity of generating energy source with produced methane, high treating efficiency, high COD and SS eliminating rate, and other advantages.

Description

technical field [0001] The invention belongs to a method for purifying wastewater from pulping and papermaking, and relates to the technical fields of environmental engineering, water pollution control and water saving. Background technique [0002] The main treatment methods of papermaking wastewater include: physical and chemical methods, chemical methods, and biochemical methods. [0003] (1) The physical and chemical method mainly uses the physical properties of wastewater such as grids, sedimentation, etc., or uses the physical and chemical properties of wastewater such as coagulation and sedimentation. This method has a good treatment effect on suspended solids and some colloidal substances. Physicochemical methods are difficult to remove, but physical and chemical methods can be used as pretreatment or biochemical post-treatment of paper pulping wastewater. [0004] (2) The chemical method mainly uses the oxidation-reduction properties of electrochemical or chemical ...

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): C02F9/14C02F3/30C02F3/28C02F3/02
CPCY02E50/30Y02W10/10
Inventor 徐书栋
Owner 山东贵和显星纸业有限公司
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