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Tanning advanced treatment wastewater recycling device and method

A waste water circulation and advanced treatment technology, applied in separation methods, chemical instruments and methods, water/sewage multi-stage treatment, etc., can solve the problems of large investment in fixed assets, high cost of waste water regeneration, waste of water resources, etc., to reduce cleaning Recycling cost, low cost, cost-saving effect

Inactive Publication Date: 2013-02-13
BOYING XIAMEN SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0019] The purpose of the present invention is to provide a method based on the problems of large investment in fixed assets, high energy consumption, high regeneration cost of waste water, low reuse rate and waste of water resources in the existing tannery wastewater treatment method. Nano catalytic electrolysis technology, immersion ultrafiltration technology and electrodialysis technology are combined and applied, and the cost is low and the efficiency is high, so that it can achieve the waste water regeneration and recycling device and method for tannery advanced treatment waste water recycling

Method used

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  • Tanning advanced treatment wastewater recycling device and method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0060] 150 tons / day tannery advanced treatment wastewater purification regeneration and recycling method.

[0061] The measured indexes of the printing and dyeing advanced treatment wastewater are shown in Table 1.

[0062] Table 1

[0063] serial number

project

unit

measured value

serial number

project

unit

measured value

1

COD Cr

mg / L

130

5

Ammonia nitrogen

mg / L

3.8

2

SS

mg / L

25

6

Salt content

‰

7.6

3

Turbidity

NTU

9

7

pH

8.1

4

Chroma

80

8

Conductivity

μS / cm

2350

[0064]150 tons of tannery advanced treatment wastewater is extracted by the water supply pump at a flow rate of 7.5T / h, and then input into the nano-catalytic electrolysis machine. The nano-catalytic electrolyzed water directly enters the sedimentation tank, and after precipitation, it enters t...

Embodiment 2

[0074] 3000 tons / day tannery advanced treatment wastewater purification regeneration and recycling method.

[0075] The indicators of the advanced treatment of tannery wastewater after determination are shown in Table 4:

[0076] Table 4

[0077] serial number

project

unit

measured value

serial number

project

unit

measured value

1

COD Cr

mg / L

56

5

Salt content

‰

0.6

2

SS

mg / L

11

6

pH

7.7

3

Turbidity

NTU

6

7

Conductivity

μS / cm

1100

4

Chroma

60

[0078] After being extracted by the water supply pump at a flow rate of 150T / h, the advanced treatment wastewater of tannery is input into the nano-catalysis electrolysis tank, and the nano-catalysis electrolysis water directly enters the sedimentation tank, and after neutralization and precipitation, the ultrafiltration...

Embodiment 3

[0088] 6000 tons / day tannery advanced treatment wastewater purification regeneration and recycling method.

[0089] The indicators of the purification, regeneration and recycling device for the advanced treatment of tannery wastewater are shown in Table 7.

[0090] Table 7

[0091] serial number

project

unit

measured value

serial number

project

unit

measured value

1

COD Cr

mg / L

91

4

Salt content

‰

0.9

2

SS

mg / L

22

5

pH

7.7

3

Turbidity

NTU

7.4

6

Conductivity

μS / cm

3100

[0092] After being extracted by the water supply pump at a flow rate of 300T / h, the advanced treatment wastewater of tannery is input into the nano-catalysis electrolysis tank, and the nano-catalysis electrolysis water directly enters the sedimentation tank, and after precipitation, the solid impurities, plankton, and Bacteria and c...

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Abstract

A tanning advanced treatment wastewater recycling device and method relate to the treatment of one kind of wastewater. The device is provided with a nanometer catalytic electrolysis system, an immersed ultrafiltration-membrane filtration separation system, an ultrafiltration membrane cleaning system and an electrodialysis system, wherein the nanometer catalytic electrolysis system is provided with a first stop valve, a water pump, a nanometer catalytic electrolysis machine, a setting tank and a filtering device; the immersed ultrafiltration-membrane filtration separation system is provided with a second stop valve, an immersed ultrafiltration membrane pool, a blower, an aerator, an ultrafiltration membrane system, a suction pump and a dialysis fluid storage tank; the ultrafiltration membrane cleaning system is provided with a cleaning solution tank, a backwashing pump, a fourth stop valve and a connection pipe; and the electrodialysis system is provided with a fifth stop valve, an electrodialysis machine, a dialysis fluid storage tank and a condensed water storage tank. The method comprises the following steps: performing nanometer catalytic electrolysis, performing immersed ultrafiltration and finally performing electrodialysis. The method is based on the combination of the nanometer catalytic electrolysis technology, the immersed ultrafiltration technology and the electrodialysis technology; the method has lower cost and higher efficiency; and wastewater can be recycled.

Description

technical field [0001] The invention relates to wastewater treatment, in particular to a recycling device and method for advanced treatment of wastewater in tanning based on nano-catalytic electrolysis technology and electrodialysis technology. Background technique [0002] According to statistics, my country's tanning industry discharges more than 100 million tons of wastewater to the environment every year, accounting for about 0.3% of my country's total industrial wastewater discharge; the output value of the leather industry ranks third in the light industry, second only to papermaking And the brewing industry, it can be seen that the tanning industry not only consumes a large amount of fresh water resources every year, but also discharges a large amount of wastewater, which poses a serious threat to human health and the sustainable development of the entire society. Therefore, the treatment of tannery wastewater should be strengthened, and the treatment of tannery wastew...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F9/06C02F1/469C02F103/24
Inventor 张世文王峰
Owner BOYING XIAMEN SCI & TECH