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Method for advanced treatment and recycling of petroleum and petrochemical wastewater

A petrochemical wastewater and advanced treatment technology, applied in chemical instruments and methods, water/sewage multi-stage treatment, water/sludge/sewage treatment, etc., can solve the problem of high system operation and maintenance costs, water volume cannot be guaranteed, and equipment operation is stable In order to achieve the effects of strong resistance to the impact of sewage water quality changes, intuitive and convenient operation and maintenance, and stable operation

Inactive Publication Date: 2009-12-09
JIANGDU COUNTY ENVIRONMNT PROTECTION EQUIPS FACTORY
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Problems solved by technology

[0002] At present, most of the petroleum and petrochemical sewage treatment is discharged after the three-stage treatment of "oil separation-air flotation-biochemical" reaches the discharge standard, and a few are reused after retreatment, such as double membrane method or ion exchange method. The core physical treatment method, but affected by factors such as high organic matter in sewage, large changes in water quality, poor equipment operation stability, and difficult maintenance operations, the scale of reuse is generally small, and the quality and quantity of reused water cannot be guaranteed. System operation and maintenance costs are high

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  • Method for advanced treatment and recycling of petroleum and petrochemical wastewater

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Embodiment Construction

[0026] 1) The effluent (B / C<0.2) after preliminary treatment of refinery sewage enters the regulating tank 1 .

[0027] 2) The sewage is transported from the regulating tank 1 to the anaerobic tank 2 through the water pump, and the sewage entering the anaerobic tank is quickly mixed with the micro-ecological flora in the anaerobic tank by using the stirring device of the anaerobic tank, so that it is basically completely mixed state; after anaerobic treatment, the macromolecular refractory substances in the sewage are transformed into small molecular substances that are easy to degrade and biochemical, improving the biodegradability of sewage. The COD of the anaerobic biological reaction effluent is 100-200mg / L, preferably 120-160mg / L.

[0028] 3) The sewage simply settles after passing through the anaerobic tank, and then enters the aerobic tank 3 for aerobic biochemical treatment. On the one hand, the sludge in the aerobic tank is aerated to ensure the oxygen content in the...

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Abstract

The invention provides a method for the advanced treatment and recycling of petroleum and petrochemical wastewater and relates to the technical field of water treatment, in particular to the technical field of the advanced treatment and recycling of oil refining wastewater and oilfield produced wastewater. With an agitator adopted, anaerobic biological reaction, aerobic treatment are carried out on the petroleum and petrochemical wastewater in sequence, finally the wastewater with mud going through the aerobic treatment is filtered by an ultrafiltration membrane, the filtered water is recycle water. The method of the invention can shorten cultivation cycle at the initial stage of wastewater biochemistry, improve impact resistance capacity of the biochemical system in the process of operation, and adapt to wastewater which is biochemically difficult to degrade and suffers lack of nutrients; in addition, the method can strengthen activity of microorganism by biological modifier, sustain species group stability of micro-ecological flora and ensure long term, valid and stable operation of the whole system; and the treated recycle water features little change of water quality and low retention level of organism.

Description

technical field [0001] The invention relates to the technical field of water treatment, in particular to the technical field of advanced treatment and reuse of refinery wastewater and petroleum extraction wastewater. Background technique [0002] At present, most of the petroleum and petrochemical sewage treatment is discharged after the three-stage treatment of "oil separation-air flotation-biochemical" reaches the discharge standard, and a few are reused after retreatment, such as double membrane method or ion exchange method. The core physical treatment method, but affected by factors such as high organic matter in sewage, large changes in water quality, poor equipment operation stability, and difficult maintenance operations, the scale of reuse is generally small, and the quality and quantity of reused water cannot be guaranteed. System operation and maintenance costs are high. Contents of the invention [0003] The purpose of the present invention is to provide an ad...

Claims

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Application Information

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IPC IPC(8): C02F9/14C02F3/30C02F1/44
Inventor 虞荣松李必文俞杰
Owner JIANGDU COUNTY ENVIRONMNT PROTECTION EQUIPS FACTORY
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