Hydroxylamine and ferrous ions strengthen domestic sewage pna integrated sbbr deep denitrification method

Abstract

The invention discloses a method for strengthening domestic sewage PNA integrated SBBR deep denitrification with hydroxylamine and ferrous ions, belonging to the field of sewage treatment. The system includes water inlet tank, SBBR reactor and outlet water tank. The SBBR reactor uses polypropylene plastic ring packing with a filling rate of about 20%. The bottom of the SBBR reactor is equipped with a microporous aeration plate, and the aeration pump is connected to a gas rotameter to control the air intake of the system. The domestic sewage enters the SBBR reactor through the peristaltic pump. The addition of hydroxylamine in the aerobic aeration stage can effectively inhibit NOB, quickly realize and stably maintain the short-term nitrification phenomenon of urban domestic sewage, and the addition of ferrous ions in the anoxic stirring stage will promote the Anammox bacteria in the system. Enrichment, enhance its activity. The NOB that competes with Anammox bacteria for nitrous substrates in the system will be further inhibited, and AOB and Anammox, which play the main role in denitrification, are in a highly active state, thus ensuring the stable operation of the PNA integrated SBBR system. The invention has the advantages of simple structure, strong operability, energy saving and consumption reduction, and no additional carbon source is needed.

Description

Hydroxylamine and ferrous ion enhanced domestic sewage PNA integrated SBBR deep denitrification method technical field The method that hydroxylamine involved in the present invention and ferrous ion strengthens domestic sewage PNA integrated SBBR deep denitrification, It belongs to the technical field of sewage biological treatment, and is suitable for the denitrification treatment of urban domestic sewage with a low carbon-nitrogen ratio. Background technique Excessive discharge of nitrogen in domestic sewage is an important cause of water hypoxia, destruction of water ecological environment and eutrophication. one of the reasons. The traditional nitrification, denitrification and denitrification process requires additional carbon sources and consumes a large amount of oxygen. Domestic sewage not only has high treatment costs, but also leads to an increase in sludge production. The use of PNA integrated SBBR process to reduce the carbon to nitrogen ratio The den...

AI Technical Summary

Problems solved by technology

The traditional nitrification and denitrification denitrification process requires additional carbon sources and consumes a large amount of oxygen. For domestic sewage with a low carbon-to-nitrogen ratio, not only the treatment cost is high, but also the sludge production will increase.

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