A method for synchronous removal of ammonia nitrogen and nitrate nitrogen in continuous flow usb reactor by short-range denitrification enhanced deamox process

Abstract

The invention discloses a method for synchronously removing ammonia nitrogen and nitrate nitrogen in a continuous flow USB reactor through a short-range denitrification reinforcement DEAMOX technology, and belongs to the field of sewage treatment. The method comprises the steps that a USB reactor is inoculated with DEAMOX granule sludge, nitrate nitrogen is converted into nitrite nitrogen through an organic carbon source in fed water in short-range denitrification, ammonia nitrogen in the fed water is removed through the in-situ anaerobic ammonia oxidation effect, and the purpose of efficiently removing nitrogen is achieved by optimizing the mass concentration ratio of nitrate nitrogen to ammonia nitrogen in wastewater and controlling and adjusting the flow of organic carbon source in fed water. The problems that treatment of wastewater containing ammonia nitrogen and nitrate nitrogen is low in treating efficiency and high in energy consumption are effectively solved, aeration consumption in the aerobic stage is not needed, the external carbon source consumption is reduced, the residual sludge yield is low, and the follow-up treating cost is greatly reduced; in addition, the DEAMOX technology achieved in the continuous flow USB reactor has the advantages that the reaction speed is high, nitrate nitrogen produced in anaerobic ammonia oxidation process is removed in situ, and the total nitrogen removal rate and the denitrifying load are high.

Description

technical field [0001] The invention relates to a technique for synchronously removing ammonia nitrogen and nitrate nitrogen in a continuous-flow USB reactor in a short-range denitrification enhanced DEAMOX process, and belongs to the technical field of sewage biological treatment. Background technique [0002] Anaerobic ammonium oxidation technology is favored because it does not require organic carbon sources, has low sludge production and does not require aeration, which can greatly reduce the operating costs of sewage treatment projects and sludge disposal costs. Since this technology requires nitrite nitrogen as an electron acceptor to oxidize ammonia nitrogen, a short-range nitrification process is often set up to generate the required nitrite nitrogen when applying this technology to treat actual ammonia nitrogen wastewater. However, the stable maintenance of short-range nitrification in actual operation is often difficult to achieve (especially low-concentration ammo...

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Problems solved by technology

However, the stable maintenance of short-range nitrification in actual operation is often difficult to achieve (especially low-concentration ammonia nitrogen wastewater), and the effluent contains a large amount of nitrate nitrogen, which restricts the wide application of anaerobic ammonia oxidation technology

On the other hand, in order to make the discharge concentration of pollutants in sewage meet the national standard, various sewage treatment plants often reduce nitrate nitrogen to nitrogen gas by adding organic matter, but this not only increases the cost of sewage treatment, but also increases the cost of sewage treatment plants. The output of excess sludge is contrary to the new requirements of building energy-saving and consumption-reducing sustainable sewage treatment plants proposed at this stage

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