System for advanced treatment and recycling of petroleum and petrochemical wastewater

Abstract

The invention provides a system 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. The system comprises an adjusting tank, an anaerobic bioreactor, an aerobic bioreactor, a cleaning tank and an ultrafiltration membrane filtration device; wherein the anaerobic bioreactor and the aerobic bioreactor are provided with stirrers, the water outlet of the adjusting tank is connected with the water inlet of the anaerobic bioreactor, the water outlet of the anaerobic bioreactor is connected with the water inlet of the aerobic bioreactor, the water outlet of the aerobic bioreactor is connected with the water inlet of the ultrafiltration membrane filtration device by the cleaning tank and a circulation pump in sequence, and the water outlet of the ultrafiltration membrane filtration device is connected with a water supply pipe of the recycle water. The system of the invention can improve impact resistance capacity of the biochemical system in the process of operation, adapt to wastewater which is biochemically difficult to degrade and suffers lack of nutrients, strengthen activity of microorganism by biological modifier and sustain species group stability of micro-ecological flora.

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 this stage, 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...

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Problems solved by technology

[0002] At this stage, 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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