Method for starting up anaerobic ammonium oxidation filter column

Abstract

The invention discloses a method for starting up an anaerobic ammonium oxidation filter column, and belongs to the field of sewage treatment and resource. The method comprises the following steps: a filter column reactor is filled with a filter material; a substrate enters the filter column reactor from the bottom, the filter column keeps the filter velocity of 0.05-0.2 m / h, inoculated anaerobic ammonium oxidation sludge is injected into the reactor from a water inlet at the middle of the filter column; firstly, water is circularly fed for hanging a film, along with the interception of the filter material on the sludge, the content of effluent suspended solid particulate matters is reduced constantly, and the sludge is steadily intercepted in the reactor; then, the anaerobic ammonium oxidation filter column is started up under a condition of low load, along with a fact that the inoculated sludge constantly adapts to the filter column reaction conditions, the processing capability of the reactor is improved continually; and finally, in a high-load culture stage, the load of inflow water is improved by a way of keeping the substrate concentration constant and shortening the hydraulic power retention time, and the processing ability of the reactor is improved. The process of film hanging of the filter column is accelerated, the survival rate of strains inoculating the filter column is increased, and the starting-up time of the reactor is shortened.

Description

technical field [0001] The invention belongs to the field of sewage treatment and recycling. In particular it relates to a method for starting an anammox process in a reactor in the form of a filter column. It is suitable for the treatment of sewage with high ammonia nitrogen and low carbon nitrogen ratio. Background technique [0002] Anaerobic ammonium oxidation (ANAMMOX) is a new biological denitrification process that breaks through the limitations of traditional biological denitrification. Compared with the traditional denitrification process, the anammox process has the advantages of no need for additional carbon source, saving 62.5% of the aeration rate, and less sludge production. Applying anaerobic ammonium oxidation process to urban domestic sewage with low C / N ratio has great practical significance for reducing energy consumption of sewage plants, reducing carbon emissions, and improving water environment. This process conforms to the concept of low-carbon, eff...

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Problems solved by technology

[0004] One of the difficulties faced by the anammox biofilm process is the long start-up time. On the one hand, due to the doubling time of anammox bacteria as long as 14 days, it is difficult to enrich from ordinary activated sludge; Difficult, low survival rate of inoculated strains

Traditionally, the start-up inoculation method of the forward-flow anammox filter column injects the anammox bacteria from the water inlet. Due to the joint action of the water flow and the generated air flow, it is easy to cause the phenomenon of sludge sinking and leakage. The sludge leaked from the filter layer and the filter layer are difficult to survive, which reduces the survival rate of the inoculated sludge

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