Solid-state heavy metal waste water treatment agent and application method thereof

A wastewater treatment agent and heavy metal technology, applied in water/sewage treatment, adsorbed water/sewage treatment, water/sludge/sewage treatment, etc., can solve the problems of external water damage, repeated treatment effects, increased odor, etc. To avoid the use of flammable and explosive solvents, the application effect is outstanding, and the production and operation are safe.

Active Publication Date: 2015-08-12
ZHEJIANG ZHENGJIE ENVIRONMENTAL SCI & TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although the pollution of the three rivers and three lakes has been vigorously treated, the pollution control effect has not yet reached the predetermined requirements, and the treatment effect has been repeated from time to time.
[0005] Existing heavy metal wastewater mostly contains: heavy metal ions such as copper, chromium, cadmium, zinc, nickel, etc., and the treatment agent mostly uses sodium sulfide as the main liquid substance. The sulfur exceeds the standard, and the odor increases
And for the water treatment system that needs to reduce the COD biochemical system, the addition of a large amount of sulfur will greatly reduce the survival rate and effectiveness of the bacteria in the biochemical process, which seriously hinders the standard treatment of COD
In addition to the impact on the COD treatment effect, its excessive discharge will also cause great harm to the external water body.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] Take 65% of calcium-based bentonite, 15% of calcium oxide, 10% of magnesium oxide, 5% of ferric oxide, 2% of sodium carbonate, and 3% of calcium hypochlorite to prepare a compound heavy metal treatment agent for the treatment of electroplating wastewater in Jinhua City. Copper and nickel are treated, and the concentration of copper ions in the front section of the wastewater secondary sedimentation tank is 15 ppm, and the concentration of nickel ions is 10 ppm. Get 1L waste water during small test, get 2g heavy metal treating agent of the present invention to add again, assist aeration 30 minutes, carry out natural settlement after, the copper ion concentration in effluent is 0.4 ppm, nickel ion is not detected, removal rate exceeds 99%.

Embodiment 2

[0027] Take 35% of calcium-based bentonite, 15% of calcium oxide, 10% of magnesium oxide, 15% of ferric oxide, 10% of sodium carbonate, and 15% of calcium hypochlorite to prepare a composite heavy metal treatment agent for the treatment of electroplating wastewater in Jinhua City. Copper and nickel are treated, and the concentration of copper ions in the front section of the wastewater secondary sedimentation tank is 15 ppm, and the concentration of nickel ions is 10 ppm. Get 1L waste water during small test, get 2g heavy metal treating agent of the present invention to add again, assist aeration 30 minutes, carry out natural settlement after, the copper ion concentration in effluent is 0.4 ppm, nickel ion is not detected, removal rate exceeds 99%.

Embodiment 3

[0029] Take 50% of calcium-based bentonite, 10% of calcium oxide, 7% of magnesium oxide, 10% of ferric oxide, 8% of sodium carbonate, and 15% of calcium hypochlorite to prepare a composite heavy metal treatment agent for the treatment of electroplating wastewater in Jinhua City. Copper and nickel are treated, and the concentration of copper ions in the front section of the wastewater secondary sedimentation tank is 15 ppm, and the concentration of nickel ions is 10 ppm. Get 1L waste water during small test, get 2g heavy metal treating agent of the present invention to add again, assist aeration 30 minutes, carry out natural settlement after, the copper ion concentration in effluent is 0.4 ppm, nickel ion is not detected, removal rate exceeds 99%.

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PUM

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Abstract

The invention relates to a solid-state heavy metal waste water treatment agent and an application method thereof. The solid-state heavy metal waste water treatment agent comprises, by weight percentage, 35-65% of calcium bentonite, 5-15% of calcium oxide, 5-10% of magnesium oxide, 1-15% of iron sesquioxide, 2-10% of sodium carbonate and 2-15% of calcium hypochlorite. The application method includes: adding the solid-state heavy metal waste water treatment agent into waste water containing heavy metal ions, and continuously stirring for 5-60 minutes; then performing liquid-solid separation, and discharging water with the heavy metal being removed. By the method capable of treating the waste water, containing the heavy metal, of electroplating and etching liquid, the heavy metal content in the discharged water can reach below 0.5-1ppm, and the heavy metal removing rate in low- and medium-concentration waste water can reach more than 90-99%.

Description

technical field [0001] The invention relates to a treatment agent for treating low-concentration heavy metal wastewater, relates to the removal of heavy metal ions in heavy metal-containing wastewater, and belongs to the field of wastewater treatment in environmental protection. Background technique [0002] At present, more than half of the major rivers in China are moderately or seriously polluted. Although the pollution of the three rivers and three lakes has been vigorously treated, the pollution control effect has not yet reached the predetermined requirements, and the treatment effect has been repeated from time to time. The root cause of pollution control lies in source control. Therefore, the Ministry of Environmental Protection began to recommend the implementation of a third-party operation system in 2014. The reason is that after the professional operation of corporate pollution control facilities, compared with the operation of polluting companies themselves,...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F1/62C02F1/28B01J20/12
Inventor 任松洁周立新
Owner ZHEJIANG ZHENGJIE ENVIRONMENTAL SCI & TECH CO LTD
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