Synchronous carbon removal and nitrogen removal reactor

Abstract

The invention discloses a synchronous carbon and nitrogen removing reactor which is suitable for the treatment of waste water with high ammonia nitrogen and low carbon and nitrogen ratio, in particular for the treatment of kitchen waste water, an anaerobic digestion solution and the like which are similar to the waste water with high ammonia nitrogen and low carbon and nitrogen ratio. The synchronous carbon and nitrogen removing reactor mainly comprises a cylindrical inner cylinder body and a cylindrical outer cylinder body which are coaxial, wherein an aeration device, a jet device, filler, an effluent weir and the like are arranged in the cylinder bodies; biological filter as a carrier is distributed in the inner cylinder; flow-separated ball filler as a carrier is put into the outer cylinder; after the anaerobic digestion solution with the high ammonia nitrogen is treated by the reactor, the removal rate of the ammonia and the nitrogen can reach 75 to 90 percent, and the removal rate of CODCr (Chemical Oxygen Demand) can reach 55 to 65 percent.

Description

technical field [0001] The invention relates to a synchronous decarbonization and denitrification reactor, which belongs to the technical field of biological treatment of high-concentration ammonia-nitrogen wastewater, and is especially suitable for the treatment of similar high-ammonia-nitrogen and low-carbon-nitrogen ratio wastewater such as digestive juice produced after anaerobic fermentation of kitchen wastewater . Background technique [0002] Nitrogen in the traditional biological denitrification process exists in the form of organic nitrogen, ammonia nitrogen, nitrite nitrogen and nitrate. Only 0% to 5%. Traditional biological denitrification technology follows the discovered nitrogen cycle mechanism in nature. Organic nitrogen undergoes ammonification, nitrosation, nitrification and denitrification under the action of ammonifying bacteria, nitrosifying bacteria, nitrifying bacteria and denitrifying bacteria in sequence. Finally, it turns into nitrogen and overflow...

AI Technical Summary

Problems solved by technology

[0003] Traditional biological denitrification technology is currently the most widely used denitrification technology, but there are many problems in the traditional biological denitrification process: (1) The process is long, the area is large, and the infrastructure investment is high

(2) Due to the slow proliferation of nitrifying bacteria and the difficulty in maintaining a high biological concentration, especially in low-temperature winters, the HRT of the system is longer, requiring a larger aeration tank, which increases investment and operating costs

(3) In order to maintain a high biological concentration and obtain a good denitrification effect, the system must simultaneously return sludge and nitrifying liquid, which increases power consumption and operating costs

(4) The impact resistance of the system is weak, and high-concentration NH and NO wastewater will inhibit the growth of nitrifying bacteria

(5) The acidity produced in the nitrification process needs to be neutralized by adding alkali, which not only increases the treatment cost, but also may cause secondary pollution

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