Unlock instant, AI-driven research and patent intelligence for your innovation.

Advanced treatment and reclaimed-water recycling technology for printing and dyeing waste water

A printing and dyeing wastewater, advanced treatment technology, applied in water/sewage multi-stage treatment, water/sludge/sewage treatment, chemical instruments and methods, etc., can solve the problems of high investment, operation and maintenance costs, etc., and achieve reuse rate High efficiency, save production cost, and facilitate the promotion of large-scale industrialization

Inactive Publication Date: 2015-12-23
浙江巨能环境工程有限公司
View PDF3 Cites 9 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to overcome the problems of high investment, operation and maintenance costs of advanced treatment of existing printing and dyeing wastewater after physical, chemical and biochemical pretreatments, and to provide a low-cost, high-efficiency printing and dyeing wastewater advanced treatment process, which can better Satisfy the effluent water quality requirements for reclaimed water reuse

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
  • Advanced treatment and reclaimed-water recycling technology for printing and dyeing waste water
  • Advanced treatment and reclaimed-water recycling technology for printing and dyeing waste water
  • Advanced treatment and reclaimed-water recycling technology for printing and dyeing waste water

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] Add PAM to the effluent of printing and dyeing wastewater after physical, chemical and biochemical pretreatment for flocculation reaction. The amount of PAM added per liter of wastewater is 1.0mg. Ratio of 20%, the air flotation effluent enters the ozone tank for oxidation, the amount of ozone added per liter of wastewater is 15mg, and the residence time is 1.2h. After treatment, the effluent enters the sand filter through the lift pump. The sand filter is funnel-shaped and paved with 3 Layers of quartz sand with different particle sizes, from top to bottom, the particle sizes of quartz sand are 10mm, 1mm and 0.1mm, and the residence time is 1h. The test results of effluent water quality at each stage are as follows:

[0020]

[0021] After treatment, the removal rate of suspended matter reaches 97.5%, the removal rate of chroma reaches 99.2%, and the removal rate of COD reaches 64%. The sand-filtered water meets the reclaimed water reuse standard and is directly us...

Embodiment 2

[0023] Add PAM to the effluent of printing and dyeing wastewater after physical, chemical and biochemical pretreatments for flocculation reaction. The amount of PAM added per liter of wastewater is 5.0mg. After flocculation reaction, it enters the air flotation tank. 30%, the air flotation effluent enters the ozone tank for oxidation, the amount of ozone added per liter of wastewater is 5mg, and the residence time is 3h. After treatment, the effluent enters the sand filter through the lift pump. The sand filter is funnel-shaped and paved with 3 different layers. The particle size of the ceramsite is 30mm, 3mm and 0.3mm from top to bottom, and the residence time is 1.5h. The test results of effluent water quality at each stage are as follows:

[0024]

[0025] After treatment, the removal rate of suspended matter reaches 95%, the removal rate of chroma reaches 98%, and the removal rate of COD reaches 65%. The sand-filtered water meets the reclaimed water reuse standard and ...

Embodiment 3

[0027] Add PAM to the effluent of printing and dyeing wastewater after physical, chemical and biochemical pretreatments for flocculation reaction. The amount of PAM added per liter of wastewater is 10 mg. After flocculation reaction, it enters the air flotation tank. 10%, the air flotation effluent enters the ozone tank for oxidation, the amount of ozone added per liter of wastewater is 50mg, and the residence time is 0.2h. After treatment, the effluent enters the sand filter through the lift pump. The sand filter is funnel-shaped and paved with 3 layers. Quartz sand with different particle sizes, from top to bottom, the particle size of quartz sand is 50mm, 5mm and 0.5mm, and the residence time is 2h. The test results of effluent water quality at each stage are as follows:

[0028]

[0029] After treatment, the removal rate of suspended solids reaches 96%, the removal rate of chroma reaches 98%, and the removal rate of COD reaches 64%. The sand-filtered water meets the re...

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 an advanced treatment and reclaimed-water recycling technology for printing and dyeing waste water. For an existing technology for conducting advanced treatment after pretreatment such as materialization and biochemistry on the printing and dyeing waste water, the problems that the investment is high, and the operation and maintenance cost is high exist. The invention aims at providing the advanced treatment technology for the printing and dyeing waste water, and the advanced treatment technology is low in cost, high in efficiency and capable of meeting effluent quality requirements of reclaimed-water recycling. Pretreatment such as materialization and biochemistry is conducted on the printing and dyeing waste water, effluent is obtained, suspended solids, partial chromaticity, COD and the like are removed for the effluent in an air floatation tank first, then the effluent enters an ozone tank, the chromaticity and the COD are removed through oxidation, filtration treatment is conducted on the effluent in a sand filter, impurities such as the suspended solids are removed, for the obtained recycled reclaimed-water, the removal rate of the suspended solids reaches 95 percent, the removal rate of the chromaticity reaches 98 percent, and the removal rate of the COD reaches 64 percent.

Description

technical field [0001] The invention relates to a wastewater treatment process, in particular to a printing and dyeing wastewater advanced treatment and reclaimed water reuse process. Background technique [0002] Printing and dyeing wastewater still contains a certain concentration of suspended solids, chroma and other substances after physical, chemical and biochemical treatment, and requires advanced treatment to realize reclaimed water reuse. The currently commonly used processes in advanced treatment technology include one or several combined processes in the processes of activated carbon adsorption, ion exchange, ultrafiltration, nanofiltration, reverse osmosis, and biological aerated filter. Because of the high manufacturing cost of the membrane and the impurities in the printing and dyeing wastewater, it is easy to cause serious membrane fouling, and the membrane needs to be cleaned and replaced frequently, resulting in high investment, operation and maintenance cost...

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): C02F9/04
Inventor 凌明沈学拯叶国祥郭慧薛懂
Owner 浙江巨能环境工程有限公司