Combined sewage denitrification process and device having automatic cyclic flowing function

Abstract

The invention provides a combined sewage denitrification process and device having an automatic cyclic flowing function. The combined sewage denitrification process comprises the steps that (a) sewage aeration, (b) automatic sewage circulation, (c) organic matter consumption, (d) nitrosation reaction, (e) anaerobic ammonia oxidation reaction, (f) electrochemical reduction reaction and (g) re-oxygenating. The sewage denitrification device comprises an aeration column, a reaction column, an inflow pipe, a backflow pipe and an aeration head and is characterized in that the two ends of the inflow pipe are respectively communicated with the top of the aeration column and the bottom of the reaction column, a sludge layer and a packing layer are arranged in the reaction column, a heterotrophic bacterial colony, a nitrosobacteria colony and an anaerobic ammonium oxidation bacterium colony exist in the sludge layer, and the packing layer consists of reduced scrap iron. The process and device can completely remove a nitrogen element in sewage through nitrous-anaerobic ammonia oxidation cyclic process and scrap iron reduction reaction, meanwhile achieve automatic cyclic flowing of a water body and have the advantages of adopting few mechanical devices and being simple in flow, low in energy consumption and remarkable in beneficial effect.

Description

technical field [0001] The present invention relates to a combined process and device for denitrification of sewage with automatic circulating flow, more specifically, to a process combination of aeration and oxygenation, nitrosation-ANAMMOX denitrification, and electrochemical reduction reaction. And it has the function of automatic circulation of water body to realize the process and device of completely removing nitrogen in sewage. Background technique [0002] Nitrogen source pollutants in water bodies are one of the main causes of water environment pollution, and they mainly exist in the form of ammonia and nitrate. Therefore, nitrogen substances in sewage have always been the focus of environmental protection workers to remove them. Until today, the traditional method is denitrification, and the emerging process is anaerobic ammonium oxidation method. The traditional removal method requires huge energy consumption and input of chemicals, not only the process is compl...

AI Technical Summary

Problems solved by technology

On the one hand, due to the small volume and high concentration of the digested liquid, the denitrification facilities are extremely uneconomical due to the complicated process, and at the same time, the purpose of complete denitrification cannot be achieved

Images