Method for cultivating anaerobic ammonium oxidation granular sludge

Abstract

The invention provides a method for cultivating anaerobic ammonium oxidation granular sludge. The method comprises the steps of: mixing and putting two or three kinds of anaerobic methanogenic granular sludge, nitrification aerobic granular sludge and hypoxia denitrification granular sludge into an upflow anaerobic reactor; pumping simulate waste water containing ammonia nitrogen and nitrite nitrogen to start; keeping the temperature of 25 to 35 DEG C in the reactor and the pH value of 7.5 to 8.0 without dissolved oxygen, and keeping hydraulic detention time of 8 to 24 hours; and stabilizing for a period of time to obtain the anaerobic ammonium oxidation granular sludge from the reactor. The invention has the advantages of having good hydraulic performance and microbial activity of the anaerobic ammonium oxidation granular sludge cultivated by the method, and greatly improving the operation effectiveness and the operation stability of the reactor.

Description

(1) Technical field

[0001] The invention relates to a method for cultivating anaerobic ammonium oxidation granular sludge, belonging to the technical field of wastewater biological treatment. (2) Background technology

[0002] According to the Bulletin on the State of the Environment in China, my country's ammonia nitrogen emissions reached 1.498 million tons in 2005, an increase of 12.6% over the previous year. Exceeding the standard of ammonia nitrogen in surface waters across the country is common, and eutrophication is very serious, leading to frequent occurrence of algal blooms in lakes and bays. The control of nitrogen pollution has become a major environmental protection issue that needs to be solved urgently.

[0003] Under anaerobic conditions, the process of using anammox bacteria to convert nitrite and ammonia into nitrogen is called anammox. Anaerobic ammonium oxidation process is a new type of biological denitrification process favored by people. This process ...