Carbon and nitrogen removal device and method of high ammonia-nitrogen and high organic matter wastewater

Abstract

The invention discloses a carbon and nitrogen removal device of high ammonia-nitrogen and high organic matter wastewater, which comprises an anaerobic fermentation tank, a high DO (dissolved oxygen) decomposition tank, a middle DO nitrification tank, a denitrification filter tank, a settling tank and a disinfection tank that are sequentially communicated, wherein the top of the anaerobic fermentation tank is communicated with the bottom of the denitrification filter tank; sludge discharge ports are formed at the bottoms of the anaerobic fermentation tank, the high DO decomposition tank, the middle DO nitrification tank and the settling tank and communicated with a sludge storage tank through sludge discharge pipes; a sludge discharge port of the sludge storage tank is communicated with a sludge hydrolysis tank; and the sludge hydrolysis tank is communicated with the denitrification filter tank. The device has the benefits that the raw wastewater is treated by anaerobic fermentation; biodegradability of the wastewater is improved; a biological load of later treatment is reduced; inhibition of nitration due to the excessive organic load can be avoided since a COD (chemical oxygen demand) removal process and a nitrification process are performed separately; hydrolysate of methane generated by the anaerobic fermentation and excess sludge serves as a denitrification carbon source; the operation cost is saved; and energy conservation and emission reduction are also facilitated.

Description

Technical field [0001] The invention relates to the technical field of sewage treatment, in particular to a carbon and nitrogen removal device and method for high ammonia nitrogen and high organic matter wastewater. Background technique [0002] With the rapid development of my country's economy and the continuous improvement of people's living standards, people's demand for meat and medicines continues to increase, accompanied by the continuous discharge of livestock and poultry wastewater, slaughter wastewater and various pharmaceutical wastewater. [0003] Livestock and poultry farming wastewater includes livestock and poultry urine and feces produced in the breeding process, as well as flushing water produced by washing pens, cleaning facility water, workers' domestic water, and rainwater flowing through the farm. The composition of livestock and poultry farming wastewater is complex and belongs to high-concentration farming wastewater. The main feature is the high content of p...

AI Technical Summary

Problems solved by technology

Aiming at the current problem that wastewater with high ammonia nitrogen and high organic matter is difficult to meet the discharge standards, exploring low-cost and high-efficiency carbon and nitrogen simultaneous removal methods has become one of the main development directions for this type of water treatment.

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