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Method for treating high-calcium and high-salt industrial wastewater

A technology for industrial wastewater and a treatment method, applied in the field of water treatment, can solve problems such as undisclosed salt-containing wastewater treatment, and achieve the effect of reducing the tendency of wastewater scaling

Active Publication Date: 2012-09-12
CHINA PETROLEUM & CHEM CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, it has not been disclosed that this process is used to treat saline wastewater, the specific technical indicators of the treated water quality, and whether it has a sustainable and stable treatment effect

Method used

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  • Method for treating high-calcium and high-salt industrial wastewater
  • Method for treating high-calcium and high-salt industrial wastewater
  • Method for treating high-calcium and high-salt industrial wastewater

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0129] Salinity content (TDS) 3.0%, COD 1250mg / L, NH 3 -The industrial waste water of N 37.6mg / L enters the high-calcium, high-salinity industrial waste water treatment system of the present invention;

[0130] a. Pretreatment system,

[0131] ①Mixed flocculation and settling unit: adding flocculant, the reaction time is 10 minutes, and the settling time is 60 minutes;

[0132] ② Pre-oxidation unit: use compressed air to aerate, control the dissolved oxygen between 1.0-2.0mg / L; adjust the pH and control the pH value between 6.0-6.5; built-in iron shavings, its porosity is 55%-95% ;

[0133] b. The hydrolytic acidification tank of the hydrolytic acidification anaerobic biochemical treatment system is divided into two sections I and II, and the structural characteristics are as follows:

[0134] ① Section I pool occupies about 3 / 5 of the volume of the pool, and adopts an intensity-controllable submerged agitator;

[0135] ②The second-stage pool accounts for about 2 / 5 of the ...

Embodiment 2

[0173] According to the method and step of embodiment 1, process index is as follows:

[0174] The salinity content (TDS) of industrial wastewater entering the system is 2.0%, COD 1126mg / L, NH 3 -N41.3mg / L,

[0175] a. Pretreatment system,

[0176] ①Mixed flocculation and settling unit: adding flocculant, the reaction time is 10 minutes, and the settling time is 120 minutes;

[0177] ② Pre-oxidation unit: use compressed air to aerate, control the dissolved oxygen between 1.0-2.0mg / L; adjust the pH and control the pH value between 6.0-6.5; built-in iron shavings, its porosity is 55%-95% ;

[0178] b. The hydrolytic acidification tank of the hydrolytic acidification anaerobic biochemical treatment system is divided into two sections I and II, and the structural characteristics are as follows:

[0179] ① Section I pool occupies about 3 / 5 of the volume of the pool, and adopts an intensity-controllable submerged agitator;

[0180] ②The second-stage pool accounts for about 2 / 5 ...

Embodiment 3

[0218] According to the method and step of embodiment 1, process index is as follows:

[0219] The salinity content (TDS) of industrial wastewater entering the system is 1.51%, COD 881.0mg / L, NH 3 -N 11.7mg / L,

[0220] a. Pretreatment system,

[0221] ①Mixed flocculation and settling unit: adding flocculant, the reaction time is 10 minutes, and the settling time is 120 minutes;

[0222] ② Pre-oxidation unit: use compressed air to aerate, control the dissolved oxygen between 1.0-2.0mg / L; adjust the pH and control the pH value between 6.0-6.5; built-in iron shavings, its porosity is 55%-95% ;

[0223] b. The hydrolytic acidification tank of the hydrolytic acidification anaerobic biochemical treatment system is divided into two sections I and II, and the structural characteristics are as follows:

[0224] ① Section I pool occupies about 3 / 5 of the volume of the pool, and adopts an intensity-controllable submerged agitator;

[0225] ②The second-stage pool accounts for about 2...

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Abstract

The invention relates to a method for treating high-calcium and high-salt industrial wastewater, belonging to the technical field of water treatment. The method adopts the following industrial wastewater treatment combined operation system: (a) a pretreatment system, (b) a hydrolysis-acidification and anaerobic biochemical treatment system, (c) a halophile pure-oxygen aeration biological treatment system. (d) a filam-touch-method biological treatment system and (e) an aeration biological treatment system. The invention provides a multi-system combined treatment method which has low treatment cost and sustainable and stable treatment effect and is suitable for treating high-calcium and high-salt environmental industrial wastewater. Under the harsh conditions that the wastewater to be treated has the salinity of 3.0 percent (accounted by CaCl2), the CoDcr concentration of 1250 mg / l and the NH3-N concentration of 41.3, the quality of the treated yielding water reaches the following indexes: the CoD concentration is smaller than 60mg / l, and the NH3-N concentration is smaller than 5mg / l. The invention is suitable for water treatment systems for petroleum exploration, petroleum refining, petroleum catalytic cracking, chlor-alkali plants and petrochemical devices of epoxy chloropropane, and the like.

Description

technical field [0001] The invention is a method for treating high-calcium and high-salt industrial wastewater. It belongs to the technical field of water treatment. Background technique [0002] Petroleum extraction, crude oil desalination, decalcification, petroleum refining, catalytic cracking, epichlorohydrin, chlor-alkali and other petrochemical installations produce a large amount of high-calcium and high-salt wastewater, which will poison the organisms in the sewage treatment system , inhibition, and damage to the sludge settling performance, which makes it difficult for the traditional activated sludge method to effectively treat high-calcium and high-salt sewage; Sewage treatment efficiency is low. At present, the treatment of high-calcium and high-salt sewage generally adopts the method of inoculating salt-adapted microorganisms to achieve effective treatment of organic matter, but the inoculation of halo-adapted bacteria is also difficult to resist the impact of...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F9/14C02F3/30C02F3/34C02F1/52C02F1/74
Inventor 王建娜潘咸峰李茂双张方银
Owner CHINA PETROLEUM & CHEM CORP
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