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- W2392225070 abstract "The present paper pursues a study of the enrichment way and characteristic features of typical DPB strains in a new species of A/O/A/O-SBR.The research urgency has come down to us is that in recent years,the land freshwater quality has been worsening than before due to the serious water eutrophication and greater nitrogen and phosphorus content in the sewage,which makes it an essential problem for water quality control.To achieve the synchronous phosphorus removal and denitrification,the present paper is dedicated to the study of the accumulation culture of the denitrifying phosphorus removal bacteria(DPB)and the characteristic features of the typical strains in a new species of anaerobic/aerobic/anoxic/aerobic SBR.In our study,we have done purifying treatment of the sewage of campus living area and conducted experiment with the carbon source of sodium acetate with the mass density of the water inlet of COD of 316.5 mg/L in an Sequencing Batch Reactor at the temperature of 25 ℃ and pH value of 7.5.Our experiment was started with the three-phase-training method,trying to remove bacteria from the mixed liquor samples in the system by isolating the denitrifying phosphorus,which was followed by a series of physiological and biochemical experiments,the denitrification P-uptake experiments and those of denitrifying nitrates to gas,and so on and so forth.The results of our experimental research prove that the phosphorus removal bacteria were enriched with a new species of A/O/A/O-SBR with anaerobic 2 h,aerobic 1.5 h,anoxia 1.5 h,aerobic 0.5 h.And,in turn,the A/O/A/O-SBR system of the COD,NH+4-N,TN,the percentage of TP removal were found equal to 91%,97%,88% and 93%,respectively,with the effluent mass density being 28.35 mg/L,0.87 mg/L,4.05 mg/L and 0.37 mg/L,respectively.Repeated processing,such as separation and purification would let us obtain Z7 to Z9 strains polyphosphate accumulation bacteria in an SBR system,which belong to the gram-negative bacteria,both of which contain metachromatic granules.And both of the strains can release and absorb phosphorus,whose absorbing rate is 50%.In addition,the two strains can also help to treat nitrate-reducing aerogenesis.They are also taken as two kinds of denitrifying phosphorus removal bacteria.Careful morphological observation,physiological characteristics analysis and 16S rDNA sequential examination prove that they are most similar to Pseudomonas,with 99.9% homology of sequence." @default.
- W2392225070 created "2016-06-24" @default.
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- W2392225070 date "2012-01-01" @default.
- W2392225070 modified "2023-09-24" @default.
- W2392225070 title "On enrichment way and characteristic features of typical DPB strains in a new species of A/O/A/O-SBR" @default.
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