High-efficiency denitrification device and method capable of releasing self-reinforced solid carbon source

Abstract

The invention discloses a high-efficiency denitrification device and method capable of self-strengthening release of a solid carbon source. The device comprises a water distribution and sludge discharge device, a reaction device and a three-phase separation device which are sequentially communicated from bottom to top, an anaerobic ammonia oxidation zone, an inner three-phase separation zone, an inner water distribution zone and a short-range denitrification zone are sequentially arranged in the reaction device from bottom to top. Ammonia nitrogen and nitrite nitrogen in wastewater are removed through the anaerobic ammonia oxidation zone, then the wastewater is separated in the inner three-phase separation zone, gas is accumulated through the gas collection device and then is subjected to pulse gas release in the short-cut denitrification zone, and liquid enters the short-cut denitrification zone through the inner water distribution zone; the short-cut denitrification zone is provided with a solid carbon source, and power generated by pulse gas release can promote flow state disturbance and release of the solid carbon source; nitrate nitrogen of the wastewater is converted into nitrite nitrogen through the short-cut denitrification region, and the nitrite nitrogen flows back to the anaerobic ammonia oxidation region. According to the invention, all reaction characteristics are fully utilized, the release efficiency of the solid carbon source is enhanced by adopting self-produced gas disturbance, the function cooperation of short-cut denitrification and anaerobic ammonia oxidation processes is improved, and efficient and economic biological denitrification is realized.

Description

technical field [0001] The invention belongs to the field of sewage treatment, and in particular relates to a high-efficiency denitrification device and method for self-strengthening solid carbon source release. Background technique [0002] Anammox is a new type of nitrogen removal process, which refers to an autotrophic biological process in which nitrite is reduced to nitrogen using ammonia as an electron donor under anaerobic conditions. Compared with the traditional nitrification-denitrification process, the new denitrification process based on anammox can significantly reduce energy consumption due to aeration, save organic carbon sources, reduce excess sludge production, reduce greenhouse gas emissions, and has a green The advantages of high efficiency, energy saving and consumption reduction are the upgrading technology of biological denitrification of wastewater. The anammox process requires nitrite as the reaction matrix, and nitrogen in nitrogen-containing wastew...

AI Technical Summary

Problems solved by technology

The organic carbon source required for the short-range denitrification process is usually provided in liquid form, but there are problems such as high cost of liquid carbon source and difficulty in controlling the dosage of carbon source. If the dosage is small, nitrate cannot be completely reduced to nitrite; If the dosage is too large, denitrification will occur throughout the process, and the concentration of organic matter in the effluent will exceed the standard

Images