Device using AB-ASBR reactors to start anaerobic ammonia oxidation

Abstract

The invention discloses a device using AB-ASBR reactors to start anaerobic ammonia oxidation. The device comprises a sewage tank, a front-section reaction device and a rear-section reaction device. Each of the front-section reaction device and the rear-section reaction device comprises an ASBR reactor, a gas collecting device, a miniature vacuum pump, a time-control switch, a gas flowmeter, a pH measuring instrument, a dissolved oxygen measuring instrument and a temperature control device. The water outlet of the front-section ASBR reactor is connected with the water inlet of the rear-section ASBR reactor. The height ratio and diameter ratio of the front-section ASBR reactor to the rear-section ASBR reactor are 2-3. A gas outlet and a trace element adding port are formed in the top end of each of the front-section ASBR reactor and the rear-section ASBR reactor. A water inlet and a water outlet are respectively formed in the bottom side of each of the front-section ASBR reactor and the rear-section ASBR reactor. The bottom center of each of the front-section ASBR reactor and the rear-section ASBR reactor is provided with a gas circulation inlet and an aeration head, and the gas circulation inlet is arranged below the aeration head. An emptying valve and a mud discharging valve are further arranged at the bottom of each of the front-section ASBR reactor and the rear-section ASBR reactor. By the device, high-concentration organic matter can be degraded under an anaerobic condition while ammonia and nitrogen in sewage can be removed, sewage treatment efficiency is increased evidently, and treatment cost is lowered.

Description

technical field [0001] The invention relates to a device for starting anaerobic ammonium oxidation in an AB-ASBR reactor, and belongs to the technical field of biological treatment of sewage sludge. Background technique [0002] my country's ammonia nitrogen emissions far exceed the environmental capacity of receiving water bodies, and have surpassed COD to become the primary indicator affecting the environmental quality of surface water, and were listed as total control indicators during the "Twelfth Five-Year Plan" period. Ammonia nitrogen reduction processes are mainly divided into two categories: physical and chemical methods and biochemical methods. Physicochemical treatment has high investment costs, high operating costs, and is likely to cause secondary pollution. The cost of biochemical treatment is low, and the secondary pollution is less, but the treatment effect needs to be improved. The traditional biological denitrification process can generally achieve 70%-80...

AI Technical Summary

Problems solved by technology

The ASBR process that has realized the anaerobic ammonium oxidation reaction has the following disadvantages: 1. The dominance of the bacterial flora is unstable and the treatment efficiency is not high

Intermittent fermentation is carried out in ASBR. As the initial substrate is continuously transferred to the intermediate product, the composition and dominant population of microorganisms in the reactor are also constantly replaced, making it difficult for Methanosarcina and Methanothrix in the ASBR reactor to stabilize. , their respective biochemical advantages cannot be fully utilized

2. The economic potential needs to be further explored, and the operating cost is relatively high

Since most of the anaerobic granular sludge formed in the ASBR reactor is methanothrix as the dominant bacteria, the function of high substrate utilization rate of Methanosarcina is sacrificed, which limits the increase of organic load of ASBR

In order to ensure the normal operation of the ASBR reactor, measures to reduce the design load are often adopted to ensure that the reactor can easily maintain the balance between acid-producing bacteria and methanogenic bacteria under a relatively low load, thus limiting the volume load of the reactor. Improve and minimize infrastructure investment

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