Method for rapidly culturing anaerobic ammoxidized granular sludge

Abstract

The invention discloses a method for rapidly culturing anaerobic ammoxidized granular sludge. According to the method, continuous culture is adopted and synthetic wastewater is used as an influent water matrix; inoculated sludge is anaerobic granular sludge and anaerobic ammoxidized flocculent sludge; through refluxing, the upflow rate is controlled, so that domestication culture of the anaerobicammoxidized granular sludge is facilitated; the sludge inoculating amount is high, the influent water distribution rate is appropriate, nutrients required for growth of the anaerobic ammoxidized granular sludge are added, and an environment required for microbial growth is provided, so that the anaerobic ammoxidized granular sludge are enriched and propagated; the interior of a reactor is kept tobe in an anaerobic state (DO is lower than 0.2 mg / L), the temperature is kept at 31 to 35 DEG C, the reactor adopts an external refluxing mode, the upflow rate is controlled through a hydraulic condition, a shearing force is increased, and the granular sludge at the bottom of a funnel is periodically returned to a main reactor, so that the anaerobic ammoxidized granular sludge is rapidly formed.

Description

technical field [0001] The invention relates to the field of biological denitrification of sewage, in particular to a method for quickly cultivating anaerobic ammonium oxidation granular sludge. Background technique [0002] Due to the acceleration of human life, production and urbanization, nitrogen pollution in water is becoming more and more serious, resulting in aggravated water eutrophication. The traditional biological denitrification process is a biological denitrification system based on the principle of nitrification-denitrification. The traditional biological denitrification process has a long process, a large area, high infrastructure costs, low treatment efficiency, and low impact load resistance. The development and research of efficient and low-consumption wastewater denitrification technology has become an urgent task in the field of water pollution control. , attracting more and more attention from researchers. [0003] Anaerobic ammonium oxidation ANAMMOX i...

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Problems solved by technology

[0005] As a new nitrogen removal technology, anaerobic ammonium oxidation process has become a research hotspot at home and abroad. This process does not require aeration and does not need to add organic carbon sources. It has the advantages of low energy consumption, low treatment cost, and low sludge production. Ammonium oxidizing bacteria are autotrophic bacteria with a long doubling time of 11 days. They are extremely sensitive to temperature, pH value, substrate concentration, etc., resulting in long acclimation and start-up time. Anammox sludge can be granulated, but the cultivation process takes a long time , how to shorten the cultivation time of anammox granular sludge has important engineering significance

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