A2N-SBR (Anaerobic-anoxic/nitrification-sequencing batch reactor) process with shortcut nitrification-denitrification denitrifying and dephosphorizing function

Abstract

The invention relates to an A2N-SBR (anaerobic-anoxic/nitrification-sequencing batch reactor) process with a shortcut nitrification-denitrification denitrifying and dephosphorizing function. Compared with an A2N-SBR process with a complete nitrification-denitrification denitrifying and dephosphorizing function, the A2N-SBR process provided by the invention saves aeration amount and organic carbonsource amount, greatly reduces residual sludge amount and saves operation cost. The A2N-SBR process provided by the invention comprises a main reaction tank and auxiliary equipment, wherein the main reaction tank comprises an A2-SBR and an N-SBR; and the auxiliary equipment comprises stirring equipment, aeration equipment, a dissolved oxygen detection device, a reflux pump, pH adjusting equipment, a pH detection device, heating equipment and a temperature detection device. The A2N-SBR process provided by the invention has the advantages that: two independent SBRs are adopted; nitrite bacteriaand denitrifying phosphate-accumulating bacteria grow separately in the two reactors through controlling proper conditions, so that denitrification is carried out when NH4<+>-N oxidation goes to NO2<-> stage, thus operation energy consumption is greatly saved, bacteria are not mutually influenced in the operation process, and the bacterial activity is higher in the whole bacterial growth process;and the process is simple, the arrangement is compact and the automation degree is high.

Description

technical field [0001] The invention is a novel biological denitrification and dephosphorization process, which is mainly used for the treatment of urban domestic sewage with relatively low C / N. Background technique [0002] With the development of the economy and the improvement of people's living standards, the discharge of urban domestic sewage is increasing year by year. A large amount of nutrients such as nitrogen and phosphorus in urban domestic sewage cause the eutrophication of the water body to become more and more serious, which seriously affects the senses of the water body and increases water supply treatment. cost of. For nutrients such as nitrogen and phosphorus in urban domestic sewage, there is still a lack of thorough and efficient treatment methods. Traditional technologies for nitrogen and phosphorus removal are inefficient, and improved technologies will inevitably increase infrastructure investment and operating costs. Therefore, practical measures mus...

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