Paper-making wastewater treatment process

A technology for treating process and papermaking wastewater, which is applied in the direction of processing wastewater treatment, water/sewage treatment, biological water/sewage treatment, etc. It can solve the problems of low recycling rate of wastewater, high COD value, and large wastewater discharge. Achieve the effect of low cost, reduce pollution degree and increase reuse rate

Inactive Publication Date: 2019-04-09
GUANGDONG JINHAOXUAN ENVIRONMENT ENG EQUIP TECH CO LTD
View PDF0 Cites 1 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to provide a kind of papermaking wastewater treatment process, to solve the papermaking wastewater discharge amount proposed in the above-mentioned background technology is big, SS, BOD, COD value are high; The pollution load accounts for more than 80% of the whole plant pollution load, especially It is pulp bleaching wastewater, its pollution load is second only to cooking waste liquor in the whole pulping and papermaking process, the traditional single treatment method has its own advantages and disadvantages, and the recycling rate of wastewater after treatment is low

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

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] A papermaking wastewater treatment process, comprising the following treatment steps:

[0020] Step 1: Send the wastewater to the oxidation pond, and use the anoxic selector, oxidation pond and secondary purifier for preliminary treatment to initially remove the extract and resin fatty acid, so that the extract in the wastewater can be removed by 85%, and the resin fatty acid can be 86% removed;

[0021] Step 2: The wastewater treated in Step 1 is treated with a secondary purifier to treat sulfate bleaching pulp wastewater, remove SS, COD, BOD, AOX, lignin and chroma in the wastewater, and carry out biological treatment through white rot fungi , to remove COD and BOD in wastewater, so that SS, COD, BOD, AOX, lignin and chroma in wastewater can be removed in the first stage;

[0022] Step 3: Proportion the sodium chloride solution and sodium hexametaphosphate at a ratio of 2:5, and disperse and vibrate for 70 minutes through an ultrasonic generator at a temperature of 7...

Embodiment 2

[0032] A papermaking wastewater treatment process, comprising the following treatment steps:

[0033] Step 1: Send the wastewater to the oxidation pond, and use the anoxic selector, oxidation pond and secondary purifier for preliminary treatment to initially remove the extract and resin fatty acid, so that 90% of the extract and resin fatty acid in the wastewater can be removed. 92% removal;

[0034] Step 2: The wastewater treated in Step 1 is treated with a secondary purifier to treat sulfate bleaching pulp wastewater, remove SS, COD, BOD, AOX, lignin and chroma in the wastewater, and carry out biological treatment through white rot fungi , to remove COD and BOD in wastewater, so that SS, COD, BOD, AOX, lignin and chroma in wastewater can be removed in the first stage;

[0035] Step 3: Mix the sodium chloride solution and sodium hexametaphosphate in a ratio of 2:5, and disperse and vibrate for 75 minutes through an ultrasonic generator at a temperature of 75°C. After the end...

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 paper-making wastewater treatment process. The process comprises the following steps: 1, delivering wastewater to an oxidation pond, performing primary treatment by utilizingan anaerobic selector, the oxidation pond and a secondary purifier, and initially removing extract and resin fatty acid to remove 85-90 percent of extract and 86-92 percent of resin fatty acid in thewater; 2, treating sulfate bleaching slurry wastewater treated in the step 1 with the secondary purifier to remove SS, COD, BOD, AOX, lignin and chromaticity in the wastewater, performing biologicaltreatment on white rot fungi, removing COD and BOD in the wastewater to perform first stage removing operation on SS, COD, BOD, AOX, lignin and chromaticity in the wastewater; and 3, proportioning a sodium chloride solution and sodium hexametaphosphate in a ratio of 2:5, performing dispersing vibration at the temperature of 70-75 DEG C for 70-75 minutes with an ultrasonic generator. According to the process, the time for treating wastewater can be improved, and the whole paper-making production efficiency can be improved.

Description

technical field [0001] The invention belongs to the technical field of wastewater treatment, and in particular relates to a papermaking wastewater treatment process. Background technique [0002] The papermaking industry has a large amount of wastewater discharge, high SS, BOD, and COD values; the pollution load accounts for more than 80% of the pollution load of the whole plant, especially the pulp bleaching wastewater, whose pollution load is second only to cooking in the entire pulp and papermaking process For waste liquid, the traditional single treatment method has its own advantages and disadvantages, and the recycling rate of waste water after treatment is low. Contents of the invention [0003] The object of the present invention is to provide a kind of papermaking wastewater treatment process, to solve the papermaking wastewater discharge amount proposed in the above-mentioned background technology is big, SS, BOD, COD value are high; The pollution load accounts f...

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): C02F9/14C02F1/52C02F1/56C02F103/28
CPCC02F9/00C02F1/5236C02F1/56C02F3/28C02F3/34C02F2103/28
Inventor 宋明轩秦颢
Owner GUANGDONG JINHAOXUAN ENVIRONMENT ENG EQUIP TECH 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