Biological denitrification integrated treatment technology

Abstract

The invention discloses a biological denitrification integrated treatment technology. An apparatus for implementing the integrated treatment technology is mainly composed of a biological denitrification integrated device, a heat insulation system, a water feeding system, an aeration system, a stirrer and a sludge return system. The integrated treatment technology includes the following steps: 1, the water feeding system pumps high ammonia nitrogen wastewater from a central position between an upper inner chamber and a lower inner chamber, and a mixed solution is internally circulated in an upper layer, flows into a lower layer from the outside periphery of the lower inner chamber, is treated, then flows into a settling zone from a vertical water outlet tube in the lower inner chamber, andis finally discharged from a water discharging tube; 2, the aeration system divides inlet gas into two branches, and the obtained two water flows are respectively introduced to a position just below and close to a water inlet and the internal central position of the upper cylindrical surface of the lower inner chamber from the outside vertical tube of an inner cylinder; and 3, settled sludge at aconical bottom is returned to the top center position of the lower inner chamber through the sludge return system. The biological denitrification integrated treatment technology has the advantages ofshort process flow, clearness in zoning, easiness in control and environmental protection.

Description

technical field [0001] The invention relates to an integrated biological denitrification process, which belongs to the field of sewage and wastewater treatment. Background technique [0002] With the continuous development of society and the continuous improvement of people's living standards, the water environment is deteriorating day by day, and the nitrogen content in water continues to increase, resulting in serious deterioration of water quality. The development in recent decades has caused nitrogen pollution in surface water and groundwater in rural areas and cities. [0003] Ammonia nitrogen is the main form of nitrogen in the aqueous environment. When ammonia-containing wastewater is discharged into rivers and lakes, especially small rivers and fish ponds with insufficient water resources, it can cause oxygen deficiency in the receiving water body, breed harmful aquatic organisms, and cause fish poisoning. The ammonia nitrogen content of urban domestic wastewater, ...

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Problems solved by technology

[0008] The problem to be solved by the present invention is: in view of the existing technical problems such as long process flow, large aeration volume, need for additional carbon source, high sludge output, difficult maintenance of granular sludge concentration, difficult process control, etc., the present invention provides a An integrated biological denitrification process

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