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

A technology of industrial wastewater and treatment methods, applied in the field of water treatment, can solve the problems of undisclosed saline wastewater treatment, etc., and achieve the effect of weakening the tendency of wastewater scaling
CN102010094AActive Publication Date: 2011-04-13CHINA PETROLEUM & CHEM CORP
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Patent Information

Authority / Receiving Office
CN · China
Current Assignee / Owner
CHINA PETROLEUM & CHEM CORP
Publication Date
2011-04-13

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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.
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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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