Device and method for advanced treatment of high-matrix wastewater by anaerobic ammonium oxidation/partial denitrification process

Abstract

The invention relates to device and method for advanced treatment of high-matrix wastewater by an anaerobic ammonia oxidation / partial denitrification process and belongs to the technical field of biological treatment of wastewater. The device consists of a water inlet box, an anaerobic ammonia oxidation reactor, a middle water box, a carbon source storage box and a partial denitrification reactor. The operating method comprises the following steps: feeding high-matrix wastewater into an anaerobic ammonia oxidation reactor; removing nitrite nitrogen and most ammonia nitrogen in inflow; feeding the wastewater containing excessive nitrate nitrogen and ammonia nitrogen into the partial denitrification reactor; reducing nitrate nitrogen to nitrite nitrogen in the presence of a sodium acetate electron donor; and then returning the effluent to the anaerobic ammonia oxidation reactor to remove nitrogen. According to the device and method provided by the invention, the nitrogen concentration of effluent of anaerobic ammonia oxidation of high-matrix wastewater is greatly reduced, and the purpose of deep denitrification of high-matrix wastewater is achieved. In addition, the device and method provided by the invention are convenient to operate and simple to control and can be used for the inhibiting effect of high concentration nitrite nitrogen on anaerobic ammonium oxidation bacteria.

Description

Technical field: [0001] The invention belongs to the technical field of wastewater biological treatment, and in particular relates to a device and method for deep denitrification process of high-matrix wastewater. Background technique [0002] Anaerobic ammonia oxidation refers to the biological process in which anammox bacteria use nitrite nitrogen as an electron acceptor to directly react with ammonia nitrogen and convert it into nitrogen gas under anaerobic or anoxic conditions, as shown in formula (1). Because this process does not require organic carbon sources, low sludge yield and no aeration, it can greatly reduce the operating costs of sewage treatment projects and sludge disposal costs; in addition, its maximum total nitrogen removal rate for wastewater is much higher than that of traditional nitrification - The removal rate of the denitrification process, therefore, the process has received much attention since the discovery of this phenomenon in the 1990s. [00...

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Problems solved by technology

[0005] In addition, it can be seen from formula (1) that although the anaerobic ammonium oxidation process has a high nitrogen removal rate, it will produce 0.26 moles of nitrate nitrogen when consuming 1 mole of ammonia nitrogen, so this process is effective in treating high-ammonia nitrogen wastewater When the effluent will contain a large amount of nitrate nitrogen, it still needs subsequent treatment to meet the national discharge standards

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