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Metal smelting factory sewage reclaiming method based on membrane filtering technique

A metal smelting and membrane filtration technology, applied in metallurgical wastewater treatment, permeation/dialysis water/sewage treatment, flocculation/sedimentation water/sewage treatment, etc. The effect of stable water quality and improved utilization of water resources

Active Publication Date: 2007-09-26
SANDA FILM SCI & TECH XIAMEN
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the cost of this method is high, and under high calcium concentration, frequent resin regeneration will produce a certain amount of new wastewater, polluting the environment

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] Embodiment 1: Refer to Table 1 for the sewage situation of a certain lead smelting plant.

[0031] Raw water (mg / L)

After the original sewage treatment process (mg / L)

After membrane treatment (mg / L)

Total Cadmium

Total arsenic

total zinc

total mercury

total lead

SS

Ca 2+

SO 4 2-

CO 3 2-

Cl -

pH

0.5

1.0

20

0.05

35

50

500

600

30

900

7-8

0.01

0.4

1.8

0.03

0.05

20

500

1000

10

400

7-8

-

-

＜1

-

-

-

＜50

＜50

＜10

＜100

6-7

[0032] It can be seen from Table 1 that the raw sewage water contains a variety of heavy metal ions, and contains a certain amount of calcium ions. After the original treatment process, it can meet the national sewage discharge standards. After the membrane treatment process of the present invention, the requirement of circulating...

Embodiment 2

[0041] Embodiment 2: Refer to Table 2 for the sewage situation of a certain copper smelting plant.

[0042] Raw water (mg / L)

After the original sewage treatment process (mg / L)

After membrane treatment (mg / L)

Total Cadmium

total copper

total magnesium

total zinc

total lead

SS

Ca 2+

SO 4 2-

CO 3 2-

Cl -

pH

1.5

15

20

10

45

50

500

600

30

700

7-8

0.01

0.1

3.2

2

0.05

20

1500

700

10

600

7-8

-

-

-

-

-

-

＜10

3

12

10

6-7

[0043] It can be seen from Table 2 that the raw sewage water contains a variety of heavy metal ions, and contains relatively high calcium ions. After the original treatment process, it can meet the national sewage discharge standards. After the membrane treatment process of the present invention, the requirement of circulating cooling water...

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PUM

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Abstract

The invention discloses a wastewater recycling method of metal smelting plant based on film filtering technique, which comprises the following steps: providing a improved waste water processing craft of metal smelting plant; adding water disposal coagulator into waste water; forming alum flower; filtering the waste water; removing big particle foreign matter; filtering through fabric filtering element; removing suspended matter and small foreign matter; pumping into ultra filtration system; filtering; removing minute suspended matter, organic matter and bacteria and so on materials; getting ultra filtration dialysate and concentrated liquid; pumping dialysate into sodium filter (or hyperfiltration )system; filtering; removing heavy metal, calcium ion; getting sodium filter (or hyperfiltration) dialysate and concentrated liquid; merging concentrated liquid; storing in water tank; coagulating sedimentation; discharging.

Description

technical field [0001] The invention relates to sewage treatment, in particular to a metal smelter sewage recycling method using membrane filtration technology. Background technique [0002] With the increase of the population, the continuous expansion of the scope of people's activities, the development of industry and agriculture, and the urbanization of the population, a large amount of industrial production sewage, agricultural production sewage and people's domestic sewage are discharged into the environment, and the problem of water pollution has become more and more serious. serious. Water is the basic material basis for people's survival. my country is a country that lacks water resources. Therefore, it is currently a hot spot to treat various industrial sewage for production in order to save water. Among all kinds of industrial wastewater, the wastewater from metal smelting enterprises has low organic content and is easy to reuse due to the characteristics of the i...

Claims

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Application Information

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IPC IPC(8): C02F1/44C02F1/52C02F103/16
Inventor 蓝伟光严滨王刚王锦龙朱振煌刘久清方富林洪昱斌
Owner SANDA FILM SCI & TECH XIAMEN
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