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

Combined process for treating papermaking waste water

A technology for papermaking wastewater and treatment process, which is applied in the process of wastewater treatment, water/sewage multi-stage treatment, oxidized water/sewage treatment, etc. The effect of reducing, good effluent quality and stable operation

Inactive Publication Date: 2011-01-26
JIANGSU PROVINCIAL ACAD OF ENVIRONMENTAL SCI
View PDF6 Cites 15 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Its characteristics are: the amount of wastewater is large, generally up to 70% to 90% of the water consumption of papermaking wastewater manufacturers; the wastewater has high chroma and complex composition, and its organic components are mostly lignin fragments, which contain various types of color. groups and polar groups, and may also be mixed with various additives; the chemical oxygen demand (COD) is relatively high, while the biochemical oxygen demand (BOD) is relatively small, and the biodegradability is poor; the quality of papermaking wastewater varies with raw materials , production varieties, production processes, and management levels vary; wastewater discharge is intermittent, and the water quality and quantity of wastewater discharge are unstable, which has a greater impact on biochemical systems

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
  • Combined process for treating papermaking waste water

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] The sewage of a papermaking enterprise enters the high-efficiency bioaugmentation tank after anaerobic treatment. COD is 464.4mg / L, NH3-N is 15.34mg / L, TN is 22.33mg / L, TP is 2.1mg / L, and the chromaticity is 260 times. The high-efficiency bio-enhanced pool adopts 100% external return and 300% internal return. The dosage of powdered activated carbon is 50mg / L. The residence time is 20h. The aeration air supply is provided according to the air-to-water ratio of 20:1. The effluent quality COD is 104.3mg / L, NH3-N is 1.34mg / L, TN is 9.6mg / L, TP is 0.8mg / L, and the chromaticity is 80 times.

Embodiment 2

[0027] Other operations are as in Example 1. But do not add powdered activated carbon. The effluent quality COD is 148.3mg / L, NH3-N is 3.34mg / L, TN is 12.6mg / L, TP is 1.2mg / L, and the chromaticity is 120 times.

Embodiment 3

[0029] Other operations are as in Example 1. The effluent quality COD is 154.4mg / L, NH3-N is 3.34mg / L, TN is 32.4mg / L, TP is 0.9mg / L, and the chromaticity is 80 times.

[0030] Example 3

[0031] Other operations are as in Example 1. But the internal reflux ratio is 200%. The effluent quality COD is 142.4mg / L, NH3-N is 2.34mg / L, TN is 28.4mg / L, TP is 1.2mg / L, and the chromaticity is 90 times.

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 combined process for treating papermaking waste water and particularly relates to a method for treating the papermaking waste water by combining anaerobic technology, aerobic technology and Fenton technology, in particular to a combined process disclosed based on the characteristics of high concentration, difficult degradation, high toxicity, large water quality fluctuation and the like of the papermaking waste water. The combined process comprises the following steps of: delivering papermaking waste water which is subjected to pretreatment such as precipitation, grid filtering and the like into an anaerobic reaction tank in a self-flow mode or a water pump lifting mode; delivering the waste water treated in the anaerobic reaction tank in the previous step into an aerobic tank in the self-flow mode; delivering the waste water into a Fenton oxidation column in a pump lifting mode; and delivering the waste water into a coagulative precipitation tank in the self-flow mode, adding polyacrylamide (PAM) for precipitation and draining the waste water. The combined process has the characteristics of high quality of drained water, small influence by toxic substances, high sludge settling performance, high market competitiveness and good environmental and social benefits and the like.

Description

technical field [0001] The present invention designs a combined treatment method of papermaking wastewater, specifically, refers to a method for treating papermaking wastewater by combining three technologies of anaerobic + aerobic + Fenton. Background technique [0002] Papermaking wastewater consists of various processing procedures of papermakers, materials lost in the production process, and sewage that washes the ground. Its characteristics are: the amount of wastewater is large, generally up to 70% to 90% of the water consumption of papermaking wastewater manufacturers; the wastewater has high chroma and complex composition, and its organic components are mostly lignin fragments, which contain various types of color. groups and polar groups, and may also be mixed with various additives; the chemical oxygen demand (COD) is relatively high, while the biochemical oxygen demand (BOD) is relatively small, and the biodegradability is poor; the quality of papermaking wastewat...

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): C02F9/14C02F3/30C02F1/72C02F103/28
Inventor 郭方峥刘伟京涂勇吴伟林乔乔
Owner JIANGSU PROVINCIAL ACAD OF ENVIRONMENTAL SCI
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