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Sewage recycling device based on electrolysis and membrane biological reactor technology and method thereof

A technology of sewage circulation and technology, applied in the direction of chemical instruments and methods, water/sewage treatment, water/sewage multi-stage treatment, etc., can solve the problems of difficult to meet the water quality requirements of production process water, poor quality of regenerated water, high operating costs, etc., to achieve Save material consumption, high recovery rate, good decolorization effect

Inactive Publication Date: 2011-07-13
BOYING XIAMEN SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The purpose of the present invention is to provide a method for regenerating water that is poor in the quality of reclaimed water in the existing sewage recycling technology, difficult to meet the water quality requirements of production processes, large investment, high operating costs, and secondary pollution to the environment. Sewage recycling device and method based on electrolysis and MBR technology for advanced treatment, regeneration and recycling, reducing sewage discharge, and improving water utilization efficiency

Method used

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  • Sewage recycling device based on electrolysis and membrane biological reactor technology and method thereof
  • Sewage recycling device based on electrolysis and membrane biological reactor technology and method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0049] Example 1: 500 tons / day advanced treatment sewage purification and recycling project.

[0050] The measured indicators of the sewage are shown in Table 1.

[0051] Table 1

[0052] serial number

project

unit

measured value

serial number

project

unit

measured value

1

COD Cr

mg / L

56

5

Turbidity

19

2

BOD 5

mg / L

7

6

Chroma

60

3

SS

mg / L

13

7

pH

7.3

4

NH 3 -N

mg / L

23

8

Conductivity

μS / cm

410

[0053] Step 1, electrolysis: start the water supply pump 12, and the sewage 3 The / h flow rate enters the electrolysis machine 13 through the stop valve 11 for electrolysis. The working voltage of the electrolysis is 12V, the voltage between the two electrodes is 3.5-8.2V, and the current density is 130mA / cm 2 , Under the action of current, the nascent chlorine [Cl], hydroxyl [OH] ...

Embodiment 2

[0061] Example 2: 3000 tons / day advanced treatment industrial sewage purification recycling project.

[0062] The measured indicators of the sewage are shown in Table 4.

[0063] Table 4

[0064] serial number

[0065] 1

[0066] Step 1, electrolysis: start the water supply pump 12, and the sewage is 137m 3 The / h flow rate enters the electrolysis machine 13 through the stop valve 11 for electrolysis. The working voltage of electrolysis is 48V, the voltage between the two electrodes is 5.5-8.2V, and the current density is 190mA / cm 2 , Under the action of current, the nascent chlorine [Cl], hydroxyl [OH] and nascent oxygen [O] produced by electrolysis make the macromolecules in the sewage open or break the chain, improving the biodegradability of the sewage. At the same time, it oxidizes and decomposes organic matter, ammonia nitrogen, colored substances, etc. in wastewater, and makes suspended solids, colloids, and charged particles in wastewater form l...

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Abstract

A sewage recycling device based on electrolysis and membrane biological reactor (MBR) technology and a method thereof relate to the sewage treatment and recycling. The sewage recycling device is provided with an electrolysis system and an MBR system, wherein the electrolysis system is provided with a stop valve, a water supply pump and an electrolysis machine; the MBR system is provided with a grid, an MBR reaction tank, an MBR component, a blower, an aerator, a sewage pump, an effluent pump and a regenerated water storage tank. The method comprises the following steps: the advanced treatment sewage of a secondary sedimentation tank, which is through biochemical treatment, is extracted by a water pump and sent in the electrolysis machine for electrolysis, then the sewage enters the MBR system through the grid to remove the solid impurities generated through electrolysis, plankton, bacteria and colloid and obtain purified sewage; and the purified sewage treated by the electrolysis system flows in the MBR system through a pipe to perform solid-liquid separation, thus the recycling of sewage can be completed. By adopting the device and method, the advanced treatment and recycling of sewage can be realized, the sewage discharge can be reduced and the utilization efficiency of water can be increased.

Description

technical field [0001] The invention relates to sewage treatment and recycling, in particular to a method for advanced treatment sewage regeneration and recycling combined with electrolysis technology and MBR (membrane bioreactor) technology. Background technique [0002] The problem of water resources and environmental pollution has been paid more and more attention by human society. On the one hand, water consumption is increasing and water resources are becoming increasingly scarce. On the other hand, sewage discharge is increasing and environmental pollution is becoming more and more serious. are receiving more and more attention from all countries. Especially for countries with severe shortage of water resources, the per capita fresh water resources are small. Therefore, the recycling of sewage has become the key to solving the shortage of fresh water resources. However, most of the current sewage treatment is discharged up to the standard, and there are not many matur...

Claims

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Application Information

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IPC IPC(8): C02F9/14C02F1/461
CPCC02F3/1268C02F1/461Y02W10/10
Inventor 张世文赵玉琴吴灿东曾广德王峰
Owner BOYING XIAMEN SCI & TECH
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