Advanced treatment method of refractory organic wastewater in sewage treatment plant of fine chemical industry park

Abstract

The invention belongs to the field of sewage treatment, and in particular relates to a method for deep treatment of refractory organic wastewater of a sewage treatment plant in a fine chemical industry park, which carries out deep treatment on secondary refractory treatment discharged water of the sewage treatment plant in the fine chemical industry park through a combined process of ozone catalytic oxidation and a biological aerated filter. With the method disclosed by the invention for processing secondary refractory treatment discharged water of the sewage treatment plant in the fine chemical industry park, the reaction efficiency in the ozone oxidation process is improved and biodegradability of the sewage is improved under economic dosage of the ozone; through treatment by the biological aerated filter adopting a low-energy consumption operation mode, chemical oxygen demand (COD) in the process discharged water can meet level-I B standard of chemical oxygen demand (COD) provided within Discharge Standard of Pollutants for Municipal Wastewater Treatment Plant (GB18918-2002), and can satisfy effluent quality demand of existing secondary treatment process upgrading and reconstruction in the sewage treatment plant of the park under pollutant reduction and total amount control requirements.

Description

technical field [0001] The invention relates to the field of sewage treatment, in particular to an advanced treatment method for refractory organic waste water from a sewage treatment plant in a fine chemical industry park, that is, the combination process of ozone catalytic oxidation and biological aerated filter is used to treat the refractory biodegradable organic waste water from a sewage treatment plant in a fine chemical industry park The secondary treatment effluent is subjected to advanced treatment. Background technique [0002] With the development needs of the regional economy, increasing industrial concentration is a common practice in various regions to develop advantageous industries and develop advantageous resources. The fine chemical industry is gradually developing from decentralized to centralized, and industrial projects are concentrated in fine chemical industrial parks. Establishing public sewage treatment plants to serve industrial parks and centraliz...

AI Technical Summary

Problems solved by technology

Ozone oxidation alone, that is, direct oxidation with ozone, has a good removal effect on the organic pollutants and chroma of this type of sewage, and can improve the biodegradability of sewage to a certain extent; however, there are limitations in the ozone oxidation alone. The main reason is that the reaction efficiency is not high enough, and the ozone depletion is relatively large.

Images