High-efficiency desulfurization and denitrification system

Abstract

The invention discloses a high-efficiency desulfurization and denitrification system. The high-efficiency desulfurization and denitrification system comprises a two-stage AO device, a mixed reactor and a secondary sedimentation tank, wherein the mixed reactor is communicated with contributing water of the two-stage AO device through a conveying pump, and the secondary sedimentation tank is communicated with contributing water of mixed reactor; the mixed reactor comprises a closed shell, a bottom partition net, a middle partition net and an upper partition net; the bottom partition net, the middle partition net and the upper partition net are arranged in the shell at intervals from bottom to top, the bottom partition net and the upper partition net are arranged to respectively form intervals with the corresponding bottom surface and top surface of the shell to form cavities, a space between the middle partition board and the upper partition board is filled with scrap iron, and a space between the middle partition board and the lower partition board is filled with sulfur particles. According to the high-efficiency desulfurization and denitrification system, a two-stage AO process is utilized in the front half part, so that the denitrification rate is increased; meanwhile, mixed liquid of a rear aerobic tank is refluxed to be in front of a front aerobic tank to react, so that the removal rate is increased, and the nitration time is shortened by about 30%.

Description

technical field [0001] The invention relates to the technical field of sewage treatment, in particular to an efficient desulfurization and nitrogen removal system. Background technique [0002] At present, domestic sewage treatment plants mostly use urban rivers to replenish water to alleviate the water shortage problems faced by rivers, lakes and wetlands. However, the effluent of the sewage treatment plant cannot meet the requirements of restoring the water ecological environment. The discharge of the main pollutant nitrogen and phosphorus still exceeds the carrying capacity of the environmental capacity. In order to prevent the eutrophication of the water body, it is necessary to strengthen the existing nitrogen and phosphorus removal. craft. [0003] The biological nitrogen removal process mainly consists of nitrification and denitrification. The nitrification process is to convert ammonia nitrogen into nitrate nitrogen under the action of autotrophic bacteria; the den...

AI Technical Summary

Problems solved by technology

However, the effluent of the sewage treatment plant cannot meet the requirements of restoring the water ecological environment. The discharge of the main pollutant nitrogen and phosphorus still exceeds the carrying capacity of the environmental capacity. In order to prevent the eutrophication of the water body, it is necessary to strengthen the existing nitrogen and phosphorus removal. craft

Images