Rapid styrene butadiene rubber (SBR) nitrosoation recovery method

Abstract

The invention discloses a rapid styrene butadiene rubber (SBR) nitrosoation recovery method and belongs to the fields of urban sewage treatment and resources. The sludge of which the long-term stable operation is damaged is arranged in an SBR reactor. The operation conditions are changed, the water inlet ammonia nitrogen concentration is 200-400 mg / L, the aeration rate is controlled, so that the dissolved oxygen is 1.0-2.0mg / L, the aeration time is controlled, the ammonia oxidation rate is controlled to be 90-99 percent, the pH is regulated to be 7.70-8.20, and the temperature is kept invariable. The rapid nitrosoation recovery is realized within four days in eight periods, and the nitrosoation rate is over 90 percent. The stable operation time reaches over seven days in 14 periods under the conditions, and the nitrosoation rate is always over 90 percent. The operating conditions are recovered to the original level, the water inlet ammonia nitrogen concentration is 50+ / -5mg / L, the nitrosoation rate can be maintained to be over 90 percent, and long-term stable operation of nitrosoation under the condition is realized. The problem that the nitrosoation is damaged and is slowly recovered for a long time is solved, and a technical guarantee is provided for realizing rapid recovery and stable operation for nitrosoation.

Description

technical field [0001] The invention belongs to the field of urban sewage treatment and recycling. Specifically relate to a kind of SBR nitrosation rapid recovery method Background technique [0002] Water is an irreplaceable substance on which all life in nature depends for survival, and it is also an indispensable and important resource for social development. However, with the continuous increase of the population and the continuous development of the economy, human beings not only consume a large amount of water resources, but also unreasonably grazing, deforestation, and discharge a large amount of pollutants into the environment, resulting in a significant deterioration of the water resource environment. In recent years, water nitrogen pollution and eutrophication have become increasingly serious, endangering the survival of fish and other aquatic organisms, and also causing huge economic losses to human industrial and agricultural production. Therefore, the problem o...

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Problems solved by technology

[0004] At present, there is no conclusion on the stable maintenance of nitrosation, especially the long-term operation under the condition of normal temperature and low ammonia nitrogen will often lead to the deterioration, destruction or even collapse of nitrosation

After the collapse, the nitrosation rate decreased, and a large amount of nitrate nitrogen was generated, which could not provide stable effluent for subsequent processes.

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