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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., which can solve the problems of low removal rate, high energy consumption, and high cost of photocatalytic oxidation. , to achieve the effect of enhanced impact resistance and stable water quality

Inactive Publication Date: 2005-06-29
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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Embodiment

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

[0036] The main pollutants of the oil refinery wastewater are petroleum-based carbon-containing organic substances. After A / O (anaerobic and aerobic series) treatment, the main pollutants such as emulsified oil, light hydrocarbons, phenols and aldehydes have been well obtained. 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. The wastewater has certain biodegradability, BOD 5 The / COD ratio is 0.25-0.35.

[0037] Processing capacity of this embodiment: 500m 3 / h, system working pressure: 0-0.4Mpa.

[0038] The quality of influent water is shown in Table 1. The specific preparation process is as follows:

[0039] 1. The oil refinery wastewater treated by the above A / O process enters the high-efficiency aerated bioreactor, and the wastewater i...

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Abstract

The present invention is a sewage advanced treatment method, which is to enter the high-efficiency aeration biochemical device after biochemical treatment of oil refinery and chemical sewage, add flocculant to the effluent, and enter the sand filter after mixing, and enter the activated carbon tower for treatment after the effluent is mixed with ozone. Then enter the high-efficiency multi-media filter, high-efficiency composite filter, and microfilter in turn. The method of the present invention is advanced in technology, stable and reliable in operation, low in cost, and COD, BOD 5 The removal rates of COD, suspended solids, oil, NH 3 -N can be controlled below 10mg / l, 20mg / l, 1.0mg / l, and 1.0mg / l, which can fully meet the desalinated water replenishment standard and meet the needs of oil refining and chemical production.

Description

Technical field [0001] The invention relates to sewage treatment technology, and more specifically, a deep purification method for lightly polluted wastewater. Background technique [0002] With the development of oilfield extraction and petrochemical industries, the demand for water continues to increase, and the cost of water continues to increase. According to the national "Tenth Five-Year" water-saving plan and requirements, the oilfield extraction and petrochemical industry's sewage reuse rate is required to reach 50%. From the perspective of sustainable development, promote sewage recycling, vigorously develop sewage recycling, and make water supply and Drainage is in an integrated cycle, and mutual supplement and reasonable allocation are important ways to solve the shortage of water resources. [0003] At present, various advanced wastewater treatment technologies that are relatively mature and studied in depth at home and abroad mainly include the following forms. [000...

Claims

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Application Information

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Patent Type & Authority Patents(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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