Denitrification dephosphorization device

Abstract

The invention discloses a denitrification dephosphorization device. The device comprises a tower body, wherein a lower cavity chamber, a bearing layer, a stuffing layer and an upper cavity chamber are sequentially arranged inside the tower body from bottom to top; the stuffing layer consists of sulfur and iron; the side wall of the lower cavity chamber is provided with a water inlet, and the side wall of the upper cavity chamber is provided with a water outlet; the iron is iron scraps, cast-iron scraps or sponge iron; and the sulfur is sulfur granules. The denitrification dephosphorization device has following beneficial effects that: a product hydrogen ion (H+) of the autotrophic denitrification reaction is released, so that the reaction activity of the iron scraps in a micro-environment is enhanced, and the dephosphorization effect is obvious; and meanwhile, the existence of the iron has a certain effect on removing the oxygen, promotes an anaerobic environment of a reactor, favors the singleness of the denitrification microorganism in the reactor and enhances the autotrophic denitration reaction. The device has low cost, stable denitrification dephosphorization effect and high removal rate, and is simple in structure and easy to operate, produce and use.

Description

technical field [0001] The invention relates to a nitrogen and phosphorus removal device, which belongs to the technical field of sewage treatment. Background technique [0002] During the "Eleventh Five-Year Plan" period, the discharge of chemical oxygen demand (COD) was effectively controlled, and the overall environmental quality of surface water was improved. Eutrophication and other issues have become the primary indicators affecting surface water quality. At present, most of the effluent from domestic sewage treatment plants is used as water replenishment for urban river landscapes to alleviate the water shortages faced by rivers, lakes, and wetlands. However, the current effluent from sewage treatment plants cannot meet the requirements for restoring the water ecological environment. Exceeding the carrying capacity of the environmental capacity, in order to prevent the eutrophication pollution of the receiving water by the traditional secondary biological effluent, i...

AI Technical Summary

Problems solved by technology

[0004] Sewage plants often use external carbon sources to strengthen nitrogen removal, including methanol and sodium acetate. These carbon sources have good treatment effects, but generally have the disadvantages of high cost, difficult control of input, and easy to cause secondary pollution. Future research The direction is to find materials that can replace this type of carbon source

Current research focuses on slow-release carbon sources based on cellulose and biodegradable polymers, and non-organic carbon electron donor materials based on sulfur, hydrogen, and methane. Long-term disadvantages, the latter has attracted attention due to its advantages such as good treatment effect and high economic feasibility

Images