Tandem anaerobic ammonia oxidation process for room-temperature denitrification of high-ammonia wastewater

Abstract

The invention discloses a tandem anaerobic ammonia oxidation process for room-temperature denitrification of high-ammonia wastewater, which comprises the following steps: 1) inoculating anaerobic ammonia oxidation granular sludge into two anaerobic ammonia oxidation reactors with different volumes; 2) with the nitrogen-containing wastewater as inlet water, operating the system at room temperature, wherein the hydraulic retention time of the large reactor is 0.57-7.69 h and the hydraulic retention time of the small reactor is 0.29-8.70 h; 3) adjusting the operation conditions of the reactors according to the concentration change conditions of ammonia nitrogen and nitrite nitrogen in effluent, so as to increase the loads of the two reactors to the maximum allowable values; 4) connecting two anaerobic ammonia oxidation reactors, which are lifted to the maximum load value, in series, and with nitrogen-containing wastewater as inlet water of a large reactor and outlet water of the large reactor as inlet water of a small reactor, operating the system at room temperature, the hydraulic retention time of the large reactor being 0.57 h and the hydraulic retention time of the small reactor being 0.29 h; and 5) adjusting the operation conditions of the reactor according to the concentration change conditions of ammonia nitrogen and nitrite nitrogen in the effluent, so that the ammonia nitrogen treatment capacity of the reactor on the wastewater is maximized.

Description

technical field [0001] The invention relates to the field of anaerobic ammonium oxidation process for treating high-ammonia wastewater, in particular to a series-type anaerobic ammonium oxidation process for denitrification of high-ammonia wastewater at room temperature. Background technique [0002] With the rapid development of modernization, a large number of nitrogen pollutants, especially ammonia nitrogen, enter the water body and cause eutrophication of the water body, causing a series of adverse consequences such as poisoning the natural environment and human beings. The high concentration of ammonia nitrogen in the water body is the "culprit" that causes a large amount of nitrogen pollutants. Therefore, the treatment of high ammonia nitrogen wastewater has become the focus of the country and the people. [0003] Anammox has great development value in the field of wastewater treatment due to its advantages of high efficiency, low energy consumption, and no secondary ...

AI Technical Summary

Problems solved by technology

The single reactor is susceptible to operation fluctuations such as shock load and temperature runaway, which lead to the suppression of the anammox activity in the reactor; the composite process requires an additional medium for the series process of other denitrification processes and anammox and chemicals to ensure the stable operation of the reactor, resulting in high processing costs, which is not conducive to large-scale industrial applications

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