Whole process low-oxygen aeration SBMBBR synchronous denitrification and dephosphorization method

Abstract

The invention discloses a whole process low-oxygen aeration SBMBBR (sequencing batch moving bed biofilm reactor) synchronous denitrification and dephosphorization method and belongs to the technical field of sewage treatment. The method achieves synchronous denitrification and dephosphorization by adding suspension filling into the traditional SBR (sequencing batch reactor) to form an SBMBBR, controlling an organic load, a nitrogen and phosphorus load and a DO (dissolved oxygen) value in the reactor, performing staged culture and acclimation on an inoculum, and performing synchronous nitrification-denitrification and denitrification-dephosphorization on enriched denitrification polyphosphate accumulating bacteria and aerobic polyphosphate accumulating bacteria and by other approaches. The method achieves the synchronous denitrification and dephosphorization for low C/N (carbon/nitrogen) ratio sewage in the same reactor under a whole process low-oxygen aeration condition, has the advantages of a simple technology, simple operational control, a high sludge load, small floor area, low energy consumption, no need of an additional carbon source, stable denitrification and dephosphorization effects and the like. The method has very practical significance in simplifying the traditional denitrification and dephosphorization sewage treatment technology, improving the denitrification and dephosphorization effects and reducing the floor area and energy consumption, and is a sewage treatment technology with good application prospects.

Description

technical field [0001] The invention belongs to the technical field of sewage treatment, and relates to a method for synchronous denitrification and dephosphorization of sewage with high nitrogen and phosphorus content and low C / N ratio, in particular to a biofilm reaction using a sequencing batch moving bed under the condition of low aeration throughout the whole process Sequencing Batch Moving Bed Biofilm Reactor (SBMBBR), a sewage treatment method for synchronous nitrogen and phosphorus removal through simultaneous nitrification and denitrification and denitrification phosphorus removal. Background technique [0002] In industrial production such as papermaking, biochemical pharmacy, fermentation and food, a large amount of sewage with high nitrogen and phosphorus content and low C / N ratio will be produced. At present, due to the problems of carbon source competition and sludge age contradiction between nitrogen and phosphorus removal in the simultaneous biological nitrog...

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Problems solved by technology

[0006] The invention provides a method for synchronous denitrification and dephosphorization of SBMBBR with full-process low-oxygen aeration for enriching denitrifying phosphorus-accumulating bacteria and aerobic phosphorus-accumulating bacteria, so as to realize synchronous denitrification and dephosphorization of high-nitrogen and phosphorus sewage. The nitrogen and phosphorus removal process has problems such as complex process, high demand for carbon sources, and the inability of nitrogen and phosphorus removal to coexist well under the same reactor and conditions.

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