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Industrial sewage treatment method and integrated apparatus for same

A technology of industrial sewage and treatment methods, applied in the direction of water/sewage multi-stage treatment, water/sludge/sewage treatment, chemical instruments and methods, etc. problems such as good, to achieve the effect of enhancing the range of adaptability

Active Publication Date: 2014-04-02
上海安而信环保科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the investment in treatment equipment for this type of sewage is high, and the treatment cost is high.
[0003]Traditional treatment of complexes or cyanides generally uses addition of complex-breaking agents, ion exchange, oxidation and alkaline chlorination to break cyanide, and these methods are generally very It is difficult to achieve the ideal treatment effect, and the investment is large, the floor area is large, the labor time is long, the complexity of daily operation is high, the operation is inconvenient and unstable
[0004]Single electric Fenton treatment may result in poor final treatment effect due to changes in water quality, unstable power supply, operating conditions, etc., affecting standard discharge and failing to achieve the best The processing effect

Method used

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  • Industrial sewage treatment method and integrated apparatus for same

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0060] Handle 1.0m 3 Volume of pesticide and chemical wastewater, water quality index:

[0061] COD25000mg / l; PH9; NH3-N1800mg / l; CN-900mg / l;

[0062] Add 500ml of sulfuric acid solution to adjust the pH of the wastewater to 2.0;

[0063] Pass a current of 3.5A, a voltage of 90V, and catalyze for 20 minutes;

[0064] Add 10L of hydrogen peroxide, mix with hydrogen peroxide concentration 25%, and aerate for 40 minutes;

[0065] Add 350ml of sodium hydroxide to adjust the pH of the wastewater to 9.0; add 0.2‰ PAM flocculant;

[0066] After the precipitation overflows, add 5ml of sodium hypochlorite with a concentration of 20% to mix, and aerate for 30min.

[0067] The wastewater quality indicators after treatment are COD1300mg / l, PH9, NH3-N 620mg / l, CN-4.0 mg / l.

Embodiment 2

[0069] Process 1m 3 Volume of chemical nickel wastewater: indicators of wastewater before treatment:

[0070] Ni2+60mg / l; COD500mg / l;

[0071] Add 300ml of sulfuric acid solution to adjust the pH of the wastewater to 2.0;

[0072] Pass a current of 4.0A, a voltage of 150V, and catalyze for 20 minutes;

[0073] Add 4L of hydrogen peroxide, mix with hydrogen peroxide concentration 25%, and aerate for 40 minutes;

[0074] Add 300ml of sodium hydroxide to adjust the pH of the wastewater to 11.0; add 0.2‰ PGA flocculant;

[0075] Water quality index of treated wastewater: Ni2+0.05mg / l, COD100mg / l.

Embodiment 3

[0077] Process 1m 3 Volume of printing and dyeing wastewater: COD2860mg / l in wastewater before treatment;

[0078] Add 200ml of sulfuric acid solution to adjust the pH of the wastewater to 2.5;

[0079] Introduce a current of 4.0A, a voltage of 125V, and catalyze for 20 minutes;

[0080] Add 2.5L of hydrogen peroxide, mix with hydrogen peroxide concentration 25%, and aerate for 40 minutes;

[0081] Add 100ml of sodium hydroxide to adjust the pH of the wastewater to 8.0; add 0.2‰ flocculant (PAM);

[0082] COD464mg / l in wastewater after treatment.

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Abstract

The invention relates to an industrial sewage treatment method and an apparatus for the same. The method comprises the following steps: adding acid into sewage to regulate pH value to 2-3; performing Electro-Fenton reaction on the sewage for 20-40min by virtue of applying current of 2.5-4.5A and voltage of 90-120V; adding hydrogen peroxide and mixing, wherein volume of addition of the hydrogen peroxide is 0.5-2 times of sewage COD (Chemical Oxygen Demand) concentration, and concentration of the hydrogen peroxide is 25-35%; firstly adding alkali and flocculating agent to regulate pH value of sewage to 8-9, wherein volume of addition of the flocculating agent is 0.02-0.3 per mill of the volume of sewage; precipitating and filtering, and then adding sodium hypochlorite and mixing, wherein volume of addition of sodium hypochlorite is 0.5-1 per mill of volume of sewage, and concentration of sodium hypochlorite is 20-30%. According to the invention, under the action of chemistry and electrocatalysis, complexes in sewage are broken down and degraded, and cyanides in sewage are degraded; COD removal rate is more than 50%; cyanide content removal rate is more than 96%; ammonia nitrogen removal rate is more than 60%.

Description

technical field [0001] The invention relates to the field of sewage treatment, in particular to an industrial sewage treatment method and an integrated device thereof. Background technique [0002] Industrial wastewater from printing and dyeing, chemical and pharmaceutical industries contains complexes or cyanides, and has a high concentration of COD and high salinity, which makes this type of industrial wastewater very difficult to treat. At present, the investment in treatment equipment for this type of sewage is high, and the treatment cost is high. [0003] The traditional treatment of complexes or cyanides generally uses the addition of complex-breaking agents, ion exchange, oxidation and alkaline chlorination to break cyanide. These methods are generally difficult to achieve the desired treatment effect, and the investment is large and the area is large. , Long labor time, high complexity in daily operation, inconvenient and unstable operation. [0004] A single elec...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F9/06
Inventor 郭大磊
Owner 上海安而信环保科技有限公司
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