Short-cut nitrification coupled anaerobic ammonia oxidation denitrification reactor

Abstract

The invention discloses a short-cut nitrification coupled anaerobic ammonia oxidation denitrification reactor, which comprises a tank body, wherein the tank body internally comprises a mixing zone, ananaerobic zone, an anoxic zone, an aerobic zone and a solid-liquid separation zone; the anaerobic zone, the anoxic zone and the aerobic zone are biochemical reaction zones and are separated in the tank body through a cylindrical inner tank body with an upper opening and a lower opening; the mixing zone is positioned at the bottom of the tank body, is internally provided with a water distributor and is communicated with the outside through a water inlet and a sludge outlet; the anaerobic zone is close to the water inlet, and the water inlet is connected with the position, close to the bottom,of the anaerobic zone; a jet aerator is arranged at a position, close to the lower part, in the middle of the aerobic zone; the jet aerator is respectively connected with an aeration pipe and an outercirculating pump; enzyme floating fillers are arranged at the middle upper parts of the anoxic zone and the aerobic zone; and the solid-liquid separation zone is provided with an inclined plate separator and is connected with the water inlet through a return pipe. The high-ammonia-nitrogen and low-C / N wastewater is treated by coupling short-cut nitrification with anaerobic ammonia oxidation denitrification, so that the occupied area and the investment operation cost are saved.

Description

technical field [0001] The invention relates to the technical field of sewage treatment equipment manufacturing, in particular to a short-range nitrification coupling anaerobic ammonium oxidation denitrification reactor. Background technique [0002] In the existing technology, the whole process of nitrification-denitrification is still the mainstream technology for biological removal of ammonia nitrogen, that is, under aerobic conditions, nitrifying bacteria convert ammonia nitrogen (NH 4 + ) into nitrate nitrogen (NO 3 – ), and then denitrifiers use biodegradable organic matter to reduce nitrate nitrogen to nitrogen gas (N 2 ), so as to achieve the purpose of removing ammonia nitrogen. per mol NH 4 + The removal needs to consume 1.9mol of oxygen (O 2 ), it needs to consume 57g COD in the denitrification process, which means that the ideal COD / TN in the raw sewage should be about 4.07, while the COD / TN of most actual urban sewage or industrial wastewater is lower tha...

AI Technical Summary

Problems solved by technology

Studies have shown that in the system of short-range nitrification coupled with anammox denitrification, due to the different requirements for dissolved oxygen of short-range nitrifying bacteria and anammox bacteria, the simultaneous metabolic reactions of the two are restricted in the coexistence environment

Images