Device and method for treating pharmaceutical waste water through synchronous biological denitrification and devulcanization and autotrophic biological denitrification

Abstract

The invention relates to a device and a method for treating pharmaceutical waste water through synchronous biological denitrification and devulcanization and autotrophic biological denitrification. The device is provided with a synchronous denitrification and devulcanization pool, an anaerobic methane generation pool, a partial nitrosification pool, an autotrophic biological denitrification pool and a water outlet pool. The method comprises the steps that: 1) anaerobic digested sludge is added to the synchronous denitrification and devulcanization pool; 2) outlet water of the synchronous denitrification and devulcanization pool enters the anaerobic methane generation pool; 3) outlet water of the anaerobic methane generation pool enters the partial nitrosification pool; 4) outlet water of the partial nitrosification pool enters the autotrophic biological denitrification pool through a middle settling pool; and 5) mixed liquid in the autotrophic biological denitrification pool flows into the water outlet pool after the sludge and water separation in a final setting pool. Through the cooperative action of the synchronous biological denitrification and devulcanization, anaerobic methane generation and autotrophic biological denitrification processes, the deep treatment of the pharmaceutical waste water is realized, and the method and the device are suitable for the standard reaching treatment and the regeneration of the pharmaceutical waste water. The device structure and the operation method are perfect, the energy is saved, the cost is low, the waste water treatment effect is good, and the efficiency is high.

Description

technical field [0001] The invention relates to a biochemical treatment technology of pharmaceutical wastewater, specifically, the advanced treatment of pharmaceutical wastewater is realized through the synergistic effect of synchronous biological denitrification and desulfurization, anaerobic methanogenesis and autotrophic biological denitrification process, which is suitable for the standard treatment of pharmaceutical wastewater and Recycle and reuse. Background technique [0002] Pharmaceutical wastewater has the characteristics of many types of organic pollutants, high concentration, complex components, and contains a large amount of sulfate, residual pharmaceuticals and their degradation products, and is recognized as difficult-to-treat organic wastewater. The water quality of pharmaceutical wastewater varies due to differences in production processes, and the NH of typical pharmaceutical wastewater 4 + -N concentration is 600~3000mg / L, COD concentration is 4000~5000...

AI Technical Summary

Problems solved by technology

[0005] Biological denitrification is the removal of NH 4 + -N is an effective route, but when NH 4 + When the concentration of -N is high, it will have a strong inhibitory effect on the activity of nitrifying bacteria, making nitrification impossible

For the removal of high-concentration and complex organic matter in pharmaceutical wastewater, anaerobic biological method is usually selected as the pretreatment process, but the volatile fatty acid VFA produced in the anaerobic process is harmful to NH 4 + The nitrification of -N will inhibit the

[0006] It can be seen that due to insufficient understanding or insufficient attention to the water quality and changing laws of pharmaceutical wastewater, the treatment process and design parameters of urban sewage are blindly copied to the pharmaceutical wastewater treatment process. Not only is the treatment cost expensive, but the effluent cannot reach the standard at all.

The existing pharmaceutical wastewater treatment technology does not coordinate the removal of organic matter and nitrogen removal well. Usually, the organic matter is removed first, and then nitrogen is removed. As a result, the organic carbon source for biological denitrification is insufficient, and the TN of the effluent is far from reaching the new level. control standards

Images