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Sewage deeply treating process

A technology for advanced treatment and sewage, applied in water/sewage multi-stage treatment, water/sludge/sewage treatment, chemical instruments and methods, etc., can solve problems such as low removal rate, high energy consumption, and expensive photocatalytic oxidation , to achieve the effect of stable water quality and enhanced impact resistance

Inactive Publication Date: 2004-06-23
李宁
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Problems solved by technology

However, these studies have not yet reached the stage of application in industrial production; in addition, the cost of photocatalytic oxidation is expensive, the removal rate is low, and the energy consumption is high, which is not conducive to popularization

Method used

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Examples

Experimental program
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Effect test

Embodiment

[0035] This example is the advanced treatment of oil refining wastewater of Daqing Refining and Chemical Company.

[0036] The main pollutants of the oil refinery sewage are petroleum carbon-containing organic substances. After the A / O (anaerobic, aerobic series) process treatment, the main pollutants such as emulsified oil, light hydrocarbons, phenols, and aldehydes have been well recovered. removal. It can be seen from the water quality analysis data that the wastewater mainly contains a certain amount of suspended solids, soluble biodegradable substances, etc., and its wastewater has certain biodegradability, BOD 5 The / COD ratio is 0.25-0.35. The refinery sewage treated by the above-mentioned A / O process is further treated by the method of the present invention.

[0037] (1) Capacity: 500m 3 / h, system working pressure: 0-0.4Mpa.

[0038] (2) Control of influent pollutants: COD≤120mg / l, NH 3 -N≤20mg / l, suspended solids≤50mg / l, temperature 15-25°C; see Table 1 for the ...

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Abstract

The sewage deeply treating process for treating oil refining and chemical sewage after biochemical treatment includes treatment in efficient aeration bioreactor, adding flocculant to water, sand filtering, mixing with ozone active carbon treatment, filtering in efficient multiple medium filter, filtering in efficient composite filter, and filtering in microfilter successively. The advanced stable treating process has low cost, COD eliminating rate over 90 % and BOD5 eliminating rate over 95 %, and the treated water has COD less than 10 mg / L, suspension 20 mg / L, oil 1.0 mg / L and NH3-N 1.0 mg / L, reaches the standard for desalting water and meets the requirement of oil refining and chemical production.

Description

technical field [0001] The invention relates to sewage treatment technology, more specifically, a deep purification method for lightly polluted waste water. Background technique [0002] With the development of oil field oil production and petrochemical industry, the demand for water is increasing, and the cost of water is increasing. According to the national "Tenth Five-Year Plan" water-saving plan and requirements, the sewage reuse rate of oilfield oil production and petrochemical industry is required to reach 50%. From the perspective of sustainable development, promote the recycling of sewage, vigorously develop sewage recycling, and make water supply and Drainage is an integrated cycle, and mutual complementarity and rational allocation are important ways to solve the shortage of water resources. [0003] At present, various advanced wastewater treatment technologies that are relatively mature and deeply researched at home and abroad mainly have the following forms. ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F9/02C02F9/14
Inventor 李宁梁玉文崔童赵国忠杨世彬刘德发张树林付强
Owner 李宁
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