Device and method for treating high-concentration ammonia-nitrogen wastewater in aeration-anaerobic circulation mode

Abstract

The invention discloses a device for treating high-concentration ammonia-nitrogen wastewater in an aeration-anaerobic circulation mode. The device comprises an oxygenating column, a water inlet pump, a sludge reactor and a refluxing tank. An aerator is arranged at the bottom of the oxygenating column, a water distributing pipe is arranged at the bottom of the sludge reactor, oxygen-dissolved wastewater is pumped into the water distributing pipe through the water inlet pump, the refluxing tank is communicated with the oxygenating column, and gas generated by purifying the wastewater pushes the wastewater into the refluxing tank, the wastewater then flows into the oxygenating column to be oxygenated again, and circulating purifying is achieved. According to a wastewater treatment method, the oxygen dissolved in the denitriding process can only be supplied by oxygen dissolved in a water body, accurate supply control over electronic acceptors is achieved, it is guaranteed that ammonia nitrogen can only be converted into nitrite nitrogen, a proper environment is provided for smoothly carrying out the anaerobic ammonia oxidation process in the same reactor, the defect that an original anaerobic ammonia oxidation technology is quite prone to insufficient aeration or excessive aeration is overcome, the electronic acceptors are properly supplied in the denitriding process, and ammonia nitrogen in the wastewater is stably removed.

Description

technical field

[0001] The present invention relates to a treatment device and method for high-concentration ammonia-nitrogen wastewater, and more specifically, to an aeration- An anaerobic circulation type treatment device and method for high-concentration ammonia nitrogen wastewater. Background technique

[0002] In the treatment of water environment, the treatment of high-concentration ammonia-nitrogen sewage and wastewater has plagued environmental protection workers for many years. The main reasons are: the cost of removing ammonia nitrogen in wastewater by chemical methods is high; biological treatment requires a large amount of aeration, high energy consumption, and the addition of additional carbon sources such as organic matter. For example, the high concentration of ammonia nitrogen in the sludge digestion liquid of urban sewage treatment plants returns to the water treatment process, which increases the denitrification load of water treatment and becomes a huge b...

Images