Composite anaerobic ammonia oxidation reaction process and device based on granule sludge and biological films

Abstract

The invention discloses a composite anaerobic ammonia oxidation reaction process based on granule sludge and biological films. A reactor main body is inoculated by adopting flocculent sludge, the hydraulic cutting force is improved by stirring, and an inorganic salt is added so that a crystal nucleus mode is formed, and thus anaerobic ammonia oxidation granule sludge is gradually formed; the reactor adopts an operating mode of a sequencing batch reactor, and the inflow water containing high-concentration ammonia nitrogen is diluted in a mode of regulating the drainage ratio, so that the substrate concentration in the reactor is in a proper range, and inhibition to anaerobic ammonia oxidation is avoided. According to the process disclosed by the invention, the anaerobic ammonia oxidation granule sludge can be rapidly cultured from the flocculent sludge, high-concentration ammonia-nitrogen wastewater is directly received, high-load operation is realized, the process has extremely high restorability, the activity of the reactor can be rapidly restored under extreme substrate inhibition conditions, and high-load stable operation is realized. The invention also provides a corresponding reaction device. Therefore, the occupied area is saved, the construction and operation are easy and convenient, the operation is stable and high-efficiency, and the operating energy consumption is greatly reduced.

Description

technical field [0001] The invention belongs to the technical field of water treatment, in particular to a composite anaerobic ammonium oxidation reaction process and device based on granular sludge and biofilm. Background technique [0002] Nitrogen pollution will cause eutrophication of water bodies, and with the rapid development of urbanization and industrialization in my country, this problem has become increasingly serious and has caused many public environmental safety incidents. For this reason, in recent years, the state has successively promulgated and implemented new sewage discharge standards, among which the discharge requirements for ammonia nitrogen have been increased, and the total nitrogen in the effluent has been limited for the first time. total control indicators. However, there are still a large number of problems in my country such as anaerobic digestion supernatant, photoelectric wastewater and other industrial wastewater that are difficult to treat....

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Problems solved by technology

[0005] In order to overcome the above-mentioned shortcoming of the prior art, the object of the present invention is to provide a kind of compound type anaerobic ammonium oxidation reaction process and device based on granular sludge and biofilm, which overcomes the existing in the current anaerobic ammonium oxidation reactor. Under the condition of long-term load operation, the impact resistance and stability are poor, and the recovery ability is weak. Its denitrification load is high, the long-term operation stability is strong, and it still has a strong recovery ability after being strongly inhibited, so that it can achieve economical and efficient removal. total nitrogen

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