Oil-containing wastewater treatment technology by means of biofortification

Abstract

The invention provides an oil-containing wastewater treatment technology by means of biofortification. According to the invention, an A / O treatment technology is adopted. The technology comprises the step of respectively carrying out oil isolation, air floatation, anaerobic treatment, aerobic aeration and sedimentation on oil-containing wastewater, wherein in the step of aerobic aeration, a biofortification device is used, the microorganisms in the system can be cultured and strengthened by adding a specific culture medium, and the aerobic aeration can be carried out, so that the microbial community for degrading the organic matters and the ammonia nitrogen can be strengthened, and the sedimentary active sludge can be reflowed into an aerobic aeration pond again to be used. The technology has the advantages and beneficial effects that the microorganisms in the wastewater are cultured and strengthened, so that the interference problem caused by the foreign flora can be avoided, the removal effect of the toxic and harmful matters in the wastewater treatment system can be effectively improved, the nonbiodegradable organic matters can be removed, and the stability of the biological system in the wastewater treatment system can be remained; the concentration and the activity of the high-quality microorganism can be improved; the sedimentation performance of the sludge can be improved, and the generation of the sludge can be reduced; and the wastewater treatment efficiency can be improved.

Description

technical field [0001] The invention relates to the field of sewage treatment, in particular to a biologically enhanced oily wastewater treatment process. Background technique [0002] With the rapid development of the national economy, the country's requirements for environmental protection are getting higher and higher, and the discharge standards of various pollutants are gradually increasing. Some old environmental protection facilities need to be technologically transformed to meet the new requirements and discharge standards. In addition, with the expansion of the scale of the enterprise's installations, the treatment load of the sewage system gradually increases; the sewage system is vulnerable to impact when the shutdown is overhauled or the equipment fails, and the system will take a long time to recover after the impact. The stability is not high, affecting the normal operation of the subsequent reuse water treatment system, resulting in an increase in operating co...

AI Technical Summary

Problems solved by technology

[0005] The area where the applicant is located has a lot of oily wastewater, and the treatment of oily wastewater has always been a problem. It contains a large amount of refractory chemical substances, has poor biochemical properties, and the cost of physical or chemical treatment is high, and it is easy to cause secondary pollution. Bioaugmentation treatment is a better choice. The existing technologies are all external strains, which will have a certain impact on the original flora balance of oily wastewater, and there is still a lot of room for improvement in the selection of strains and specific process control.