Bio-electrocatalytic coupled contact oxidation denitrification filtration integrated bioreactor

Abstract

The invention provides a bioelectrocatalysis coupled contact oxidation denitrification filtration integrated bio-reactor which is characterized by comprising a bioelectrocatalysis pool, and a first water collection tank, a contact oxidation pool, a denitrification pool, a second water collection tank and a filtering basin which are arranged in sequence around the bioelectrocatalysis pool, whereinthe bioelectrocatalysis pool is used for performing bioelectrocatalysis on pollutants and comprises a hollow columnar electrocatalysis pool body, a cathode and an anode; the cathode is arranged alongan inner wall of the pool body; the anode is positioned in the middle of the pool body; a water inlet is formed in the electrocatalysis pool body; the first water collection tank is communicated withthe upper part of the electrocatalysis pool; the contact oxidation pool is communicated with the lower part of the first water collection tank and is used for performing biological contact oxidation degradation and carrying out a nitrification reaction of nitrogen; a plurality of aerators are arranged at the bottom of the contact oxidation pool; the denitrification pool is communicated with the upper part of the contact oxidation pool and is used for carrying out a denitrification reaction; the second water collection tank is communicated with the upper part of the denitrification pool; and awater outlet is formed in the upper part of the filtering basin.

Description

technical field [0001] The invention belongs to the field of printing and dyeing wastewater treatment devices, and in particular relates to a biological electrocatalysis coupling contact oxidation denitrification filtration integrated bioreactor. Background technique [0002] The printing and dyeing industry is a typical water-consuming industry. It takes 100-200 tons of water to process 1 ton of textiles, of which 80% to 90% become organic comprehensive wastewater after the production process. my country is a big dye production country, and there are 11 dyes produced all year round. There are more than 500 varieties of dyestuffs, with an annual production capacity of about 300,000 tons, accounting for more than 30% of the world's total dyestuff output. [0003] At present, the treatment methods of printing and dyeing wastewater at home and abroad are mainly biological methods, supplemented by physical and chemical methods. Among them, the contact oxidation method is widely u...

AI Technical Summary

Problems solved by technology

[0003] At present, the treatment methods of printing and dyeing wastewater at home and abroad are mainly biological methods, supplemented by physical methods and chemical methods. Among them, the contact oxidation method is widely used because of its mature technology and economical operation. The direction of oxidation and anti-biodegradation is developing. The presence of refractory organic substances such as polyvinyl alcohol (PVA) slurry, rayon alkali, and new additives in wastewater makes the biodegradability of printing and dyeing wastewater low, which is difficult to achieve by traditional contact oxidation methods. Effluent water quality standard

In-depth research on bioelectrochemical systems by scholars at home and abroad has found that it is a breakthrough technology that combines the advantages of anaerobic and electrochemical methods. Using bioelectrochemical methods to remove pollutants in printing and dyeing wastewater is an effective method. It is an environmentally friendly method, but it is difficult to completely remove all pollutants in printing and dyeing wastewater by single-pool operation

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