Oil field high-difficulty waste water treatment process

Abstract

The invention relates to an oil field high-difficulty waste water treatment process, which comprises a secondary sedimentation pool, a middle pool, a biochemical pool, a water outlet pool and a regulating pool, wherein the sewage firstly enters the secondary sedimentation pool to be sedimented; outlet water passing through the secondary sedimentation pool flows into the middle pool; before the flowing-in, the sewage is firstly introduced into oxidization equipment to be subjected to oxidization treatment; after the sewage is sedimented in the middle pool, and is conveyed into the biochemical pool through a pump body; the sewage in the biochemical pool is subjected to micro capture treatment through active oxygen equipment and micro-electrolysis equipment; meanwhile, a fan is installed foraccelerating the reaction speed; the sewage reacted in the biochemical pool is discharged into the regulating pool through reverse flushing; the sewage treated by the biochemical pool is discharged into the water outlet pool; clean water treated by the water outlet pool is discharged out of the system; the water in the water outlet pool is subjected to reverse flushing; the clean water is input into the biochemical pool. The oil field high-difficulty waste water treatment process has the advantages that the high contaminant removal rate can be ensured, so that the outlet water is discharged ina standard reaching way; meanwhile, the investment cost and the operation cost are well controlled; the practicability is very high.

Description

technical field [0001] The invention relates to a three-stage biochemical treatment of refractory industrial wastewater such as oil fields, printing and dyeing, medicine, chemical industry, and papermaking, and in particular relates to a process for treating difficult wastewater in oil fields. Background technique [0002] At present, the tertiary treatment of refractory industrial wastewater mainly includes adsorption, filtration, biological filter, chemical dosing and other process technologies. These technical methods have the following problems to varying degrees, 1) high investment cost, 2) pollutant removal rate Low, 3) turbid effluent quality, 4) high operating costs, etc. Based on the above reasons, the current tertiary treatment of various types of refractory industrial wastewater has been in a state of groping operation, and there are few tertiary treatment processes that operate normally and stably. Contents of the invention [0003] In order to solve the above ...

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Problems solved by technology

[0002] At present, the tertiary treatment of refractory industrial wastewater mainly includes adsorption, filtration, biological filter, chemical dosing and other process technologies. These technical methods have the following problems to varying degrees, 1) high investment cost, 2) pollutant removal rate Low, 3) turbid effluent quality, 4) high operating costs, etc. Based on the above reasons, the current tertiary treatment of various types of refractory industrial wastewater has been in a state of groping operation, and there are few tertiary treatment processes that operate normally and stably

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