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Method and device for treating alkali-residue wastewater

A technology for alkali slag wastewater and treatment methods, which is applied in natural water treatment, water/sewage treatment, multi-stage water/sewage treatment, etc., and can solve problems such as high content of chemical oxygen demand in effluent, difficult biochemical treatment, high toxicity, etc. , to achieve the effects of reducing chemical oxygen demand, improving biodegradability, and increasing utilization rate

Pending Publication Date: 2017-09-15
NANJING BALANCE ENVIRONMENTAL TECH CO LTD
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Problems solved by technology

Wastewater contains high concentrations of sulfides, mercaptans, organic acid salts, creosote, oil, and other similar organic and inorganic compounds. Wastewater has high chemical oxygen demand, high toxicity, and is difficult to directly biochemically treat
[0003] At present, the existing technology does not have a good treatment effect on this kind of wastewater, and the content of chemical oxygen demand in the effluent is too high, so it is difficult to biochemically treat it

Method used

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  • Method and device for treating alkali-residue wastewater
  • Method and device for treating alkali-residue wastewater
  • Method and device for treating alkali-residue wastewater

Examples

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no. 1 example

[0033] see figure 1 , this embodiment provides an alkali slag wastewater treatment device 10 for treating alkali slag neutralized water. The alkali slag wastewater treatment device 10 provided in this embodiment can effectively remove refractory organic matter in the alkali slag neutralization water, and improve the biodegradability of the alkali slag neutralization water. At the same time, the chemical oxygen demand in the treated alkali slag is significantly reduced, thereby eliminating the influence of the alkali slag neutralizing water on subsequent biochemistry.

[0034] The alkali slag wastewater treatment device 10 provided in this embodiment includes an acidification oil removal unit 100 , a pre-oxidation unit 200 , an electro-Fenton oxidation unit 300 and a solid-liquid separation unit 400 .

[0035] It can be understood that the acidizing deoiling unit 100 is used for deoiling the alkali slag and neutralized water. The pre-oxidation unit 200 is used to oxidize the ...

no. 2 example

[0055] see Figure 4 , This embodiment provides a method for treating alkali slag wastewater, which can effectively remove refractory organic matter in alkali slag neutralized water, and improve the biodegradability of alkali slag neutralized water. At the same time, the chemical oxygen demand in the treated alkali slag is significantly reduced, thereby eliminating the influence of the alkali slag neutralizing water on subsequent biochemistry.

[0056] The method for treating alkali slag wastewater provided in this embodiment includes: acidification degreasing step S1, pre-oxidation step S2, electro-Fenton oxidation step S3 and solid-liquid separation step S4, which will be described respectively below.

[0057] Acidification and deoiling step: perform demulsification and separation on the neutralized water of the alkali slag contained in the acidification tank 110 , and perform oil-water separation on the neutralized water of the alkali slag after demulsification and separati...

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Abstract

The invention discloses a method and device for treating alkali-residue wastewater and relates to the technical field of wastewater treatment. The method includes: acidifying to remove oil, to be more specific, performing demulsification separation on alkali-residue neutralized water in an acidifying tank, and using an oil-water separating device to perform oil-water separation on the alkali-residue neutralized water after the demulsification separation; pre-oxidizing, to be more specific, adding an oxidizing agent into a stirring reaction device; performing electro-Fenton oxidation, to be more specific, guiding the alkali-residue neutralized water after the oxidizing reaction into an electrolytic oxidation, and performing electrolytic reaction; performing solid-liquid separation, to be more specific, performing neutralization reaction on the alkali-residue neutralized water entering a neutralizing tank, and performing flocculation reaction on the alkali-residue neutralized water entering a flocculation tank. The method and device for treating the alkali-residue wastewater has the advantages that refractory organic matter in the alkali-residue neutralized water can be removed effectively, and the biodegradability of the alkali-residue neutralized water is improved; the chemical oxygen demand of treated alkali residues is lowered evidently, and influence of the alkali-residue neutralized water on subsequent biodegradation is eliminated.

Description

technical field [0001] The invention relates to the technical field of waste water treatment, in particular to a method and a device for treating alkali slag waste water. Background technique [0002] Alkali slag neutralization water is the neutralization water produced by the reaction and extraction of alkali slag wastewater produced in the process of petroleum refining and processing with gasoline dissolved in carbon dioxide, and neutralization of waste alkali. Wastewater contains high concentrations of sulfides, mercaptans, organic acid salts, creosote, oil, and other similar organic and inorganic compounds. Wastewater has high chemical oxygen demand, high toxicity, and is difficult to directly biochemically treat. [0003] At present, the existing technology does not have a good treatment effect on this kind of wastewater, and the content of chemical oxygen demand in the effluent is relatively high, making it difficult to biochemically treat it. Contents of the inventi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F9/06C02F103/36C02F101/30
CPCC02F9/00C02F1/40C02F2101/30C02F2103/365C02F1/4672C02F1/52C02F1/722C02F1/66C02F2305/026
Inventor 张继荣王进明
Owner NANJING BALANCE ENVIRONMENTAL TECH CO LTD
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