Treatment method and device for waste water containing greasy dirt

Abstract

The invention relates to the technical field of waste water treatment, in particular to a treatment method and device for waste water containing greasy dirt. The treatment method and device for the waste water containing the greasy dirt are high in treatment efficiency and reasonable in cost. The treatment device is characterized in that a grease interceptor, an air float processor, a high-pressure oxidation device, a first-level acid-base regulating pool, an aerobiotic microorganism processor, a second-level acid-base regulating pool, an anaerobe microorganism processor, a flocculation tank and a filter settling pond are arranged, multi-level grease removing gratings are arranged in the grease interceptor and evenly distributed in the flow direction of the waste water, and oleophylic and lyophobic media used for adsorbing grease are fixed to the grease removing gratings; the high-pressure oxidation device is provided with a shell, and two electrode plates are arranged in the shell and connected with a high-pressure pulse generator outside the shell. Compared with the prior art, macromolecule organic substances in the waste water are treated into a micromolecule structure through the high-pressure oxidation device, the oxygen demand for microorganism treatment in a later stage is lowered, and the treatment device has the remarkable advantages of being reasonable in structure, stable in working, high in treatment efficiency and the like.

Description

Technical field: [0001] The invention relates to the technical field of sewage treatment, in particular to a treatment method and device for oily waste water with high treatment efficiency and reasonable cost. Background technique: [0002] A large amount of oily sewage needs to be treated in the petroleum and chemical industry. So far, there is no one method in the world that can meet and meet the oily sewage treatment requirements. And most of them deal with a fixed amount of sewage and a fixed oil concentration, lacking an integrated dynamic treatment method and its device. For decades, with the rapid development of the petroleum industry, the problems brought about by oil production, gas production and drilling All kinds of sewage have brought great harm to the natural environment and human health. According to statistics in 1998, the water production volume of oilfields across the country reached more than 1.4 million cubic meters per day. Due to the hazards of these ...

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Problems solved by technology

[0005] At present, the oil field mainly adopts gravity deoiling + coagulation + coarse filtration + fine filtration process, pressure deoiling (swirl flow, coarse granulation) + coagulation + coarse filtration + fine filtration process, air flotation + coarse filtration + fine filtration process Three sets of methods are used to control the oil content, suspended solids content, and median particle size of suspended particles in oily sewage. However, the above processes have many process steps, cannot effectively remove emulsified oil and organic matter, and cannot stably control the oil content and suspended solids content. , The median particle size of suspended particles is controlled within the range of water quality standards

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