Integrated biological synchronous denitrification and decalcification device for wastewater and method thereof

Abstract

The invention discloses an integrated biological synchronous denitrification and decalcification device for wastewater and a method of the device. The device comprises a water distribution area, a chemical calcium removal area, a biological denitrification area and a separation area, wherein a microporous aeration system covers the bottom of the water distribution area, and a water inlet pipe anda return pipe are arranged on the side wall; the chemical calcium removal area is filled with quartz sand particles, and the quartz sand particle layer is covered with denitrifying granular sludge; asand inlet pipe is arranged at the top of the chemical calcium removal area, and a sand discharging pipe is arranged at the bottom of the chemical calcium removal area; a sludge inlet pipe is arrangedat the top of the biological denitrification area, and a sludge discharging pipe is arranged at the bottom; an overflow groove and a water outlet pipe are sequentially arranged on the side wall of the separation area from bottom to top; water in one path of the water outlet pipe flows back into the device through the return pipe, and water in the other path is discharged. A three-phase separatoris arranged in the center of the separation area, and a gas collection connecting pipe and an exhaust pipe are arranged at the upper part. According to the device and the method, wastewater biologicaldenitrification and chemical precipitation calcium removal processes are coupled, the integrated wastewater biological denitrification and calcium removal device can be constructed on the basis of aheterotrophic denitrification reaction in combination with a chemical precipitation process, and synchronous denitrification and calcium removal can be realized in the same reactor.

Description

technical field [0001] The invention relates to an integrated waste water biological synchronous denitrification and decalcification device, which is suitable for anaerobic biological treatment engineering of nitrogen-containing and calcium-containing industrial waste water. Background technique [0002] After the nationwide implementation of "source control and emission reduction", the organic pollution of wastewater has been effectively treated, and nitrogen and phosphorus pollution has become a major environmental problem. The sewage biological denitrification treatment process began with nitrification and denitrification in the 1960s. It has been widely used in industrial wastewater treatment due to its unique high efficiency and economic advantages. However, it encountered high Calcium challenge. In the photovoltaic industry, a large amount of hydrofluoric acid and nitric acid are used in the production process of solar panels, which produces a large amount of high-con...

AI Technical Summary

Problems solved by technology

[0009] The objective of the invention is to overcome existing defluoridation waste water because contain a large amount of Ca 2+ , after entering the biological denitrification system, it is easy to cause insufficient calcification of activated granular sludge, and an integrated wastewater biological synchronous denitrification and decalcification device is provided

Images