Method and apparatus for using aerating biological filter in advanced treatment of dyeing waste water

Abstract

The invention discloses a method and a device used for a biological aeration filter to deeply treat dyeing wastewater. The lower part of the biological filter base is connected with a blow-down pipe, while a filtering head is arranged between the upper part of the biological filter base and the lower part of a biological aeration filtering cylinder; a reserve tank and a back washing water tank are switched in from the lower part of the biological filter base respectively by a pump; after the pump is connected with a millipore aerator, the millipore aerator is arranged at the lower part of the biological aeration filtering cylinder and positioned above the filtering head; a packing layer is arranged in the biological filtering cylinder, and the upper part of the biological filtering cylinder is provided with an outlet and a back washing outlet. The method and the device utilize fillers filled in the biological aeration filter and biomembrane adsorbed thereof as treating medium, thus fully playing the roles of biological metabolism, physical filtering, the physical adsorption of the membrane and the fillers, and the multi-grade biological predation of foods in a reactor, realizing the removal of various pollutants contained in the dyeing wastewater in the reactor, and having the advantages of high treating efficiency, strong shock resistance load, small occupation area, stable and reliable operation, and the like, thus being applicable to the field of dyeing wastewater deep treatment.

Description

technical field [0001] The invention relates to a wastewater treatment method and device, in particular to a method and device for advanced treatment of printing and dyeing wastewater by an aerated biological filter. Background technique [0002] my country is a country with scarce water resources, and the per capita water resources account for 2500m 3 , which is 1 / 5 of the world's per capita level. With the rapid development of social economy, the contradiction of water shortage is becoming more and more serious. However, my country's water consumption quota is relatively high, and the water intake per 10,000 yuan of industrial added value is 5 to 10 times that of developed countries. The industrial water reuse rate is lower than 30%, and the water treatment and water utilization rate technologies have not reached the level of moderately developed countries. The printing and dyeing industry is a "big energy and water consumer", accounting for 35% of industrial wastewater, ...

AI Technical Summary

Problems solved by technology

Chemical methods include photochemical oxidation, ozone oxidation, electrochemical oxidation, etc. Although these methods have achieved good results in the advanced treatment of printing and dyeing wastewater, due to the constraints of treatment costs and high energy consumption, these new technologies have not been used in printing and dyeing wastewater. Promoted in deep p

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