Biological denitrification device and denitrification process

Abstract

The invention provides a biological denitrification device and denitrification process, the biological denitrification device comprises a tank body, a water inlet and a water outlet, the water inlet and the water outlet are formed in the tank body, and an aeration device, a water distribution device, a stirring device and biological filler are arranged in the tank body; the water distribution device is located above the aeration device, the water distribution device is communicated with the water inlet, and the water distribution device is suitable for uniformly distributing water into the tank body; the aeration device is positioned below the water distribution device; the stirring device is positioned at the bottom of the tank body; the water outlet is formed in the upper part of the tank body; the biological filler is arranged above the water distribution device in a suspended manner, and heterotrophic nitrification-aerobic denitrification strains are loaded on the biological filler. The heterotrophic nitrification-aerobic denitrification strain is loaded on the biological filler, so that the sewage nitrification and denitrification processes are carried out in the same device, the occupied space is relatively small, the structure is simple, and the ammonia nitrogen treatment effect is relatively good.

Description

technical field [0001] The invention relates to the technical field of sewage treatment, in particular to a biological denitrification device and a denitrification process. Background technique [0002] Nitrogen is an important pollution factor in the water environment. Urban domestic sewage, industrial wastewater, livestock and poultry breeding wastewater and laboratory wastewater all contain a large amount of nitrogen pollutants. Therefore, denitrification treatment has become an important direction of sewage treatment. Biological denitrification has the characteristics of low cost, effectiveness, simple operation, and no secondary pollution, and is currently the most commonly used denitrification method. In the prior art, sewage denitrification treatment generally includes nitrification and denitrification. First, the organic nitrogen is converted into ammonia nitrogen by nitrifying bacteria, and the ammonia nitrogen is oxidized to nitrite nitrogen by autotrophic nitrify...

AI Technical Summary

Problems solved by technology

[0003] The problem to be solved by the present invention is that the structure of the biological denitrification device in the prior art is complex and occupies a large space, and because the autotrophic nitrifying bacteria are sensitive to high concentrations of ammonia nitrogen, the tolerance is poor, and the removal rate of ammonia nitrogen is low

Images