基于硝化细菌与聚磷菌治理南昌内河水质的模拟研究
[Abstract]:With the rapid development of urban industry and the aggravation of non-point source pollution, urban river pollution has become a serious pollution problem. For example, the capital city of Jiangxi Province, Nanchang City, the main internal rivers Fuhe Road and Yubanhe River. Therefore, Nanchang River water quality treatment is particularly important. Among all kinds of remediation technologies, in situ bioremediation technology is widely carried out. Because of direct use of bacteria to treat water, bacteria have the disadvantage of losing easily in rivers, which greatly reduces the efficiency of mixed bacteria in treating river water quality. Immobilized microorganism technology can solve this problem well. Through monitoring and analyzing the water quality of Fuhe River and Yubanhe River in Nanchang City, nitrifying bacteria and phosphorus accumulating bacteria, nitrifying bacteria and phosphorus accumulating bacteria were selected. On the basis of the optimum proportion of Phosphorus bacteria strains, a better immobilized carrier was selected to fix the dominant strains, and the effect of the immobilized carrier on the treatment of simulated sewage, ammonia nitrogen and total phosphorus in the river was studied at the same time. The results are as follows: (1) from November 2011 to October 2012, five sections of Fuhe River in Nanchang City were monitored. (2) the highest degradation rate of nitrite nitrogen was obtained by nitrifying bacteria XH3 in laboratory, the degradation rate of ammonia nitrogen by nitrifying bacteria YH3 reached 82.75, and the degradation rate of total phosphorus by JP2 reached 58.57. The dominant strains were selected for water quality treatment. (3) the DNA of XH3,YH3,JP2 was extracted, PCR amplified, and DNA sequenced. Sequence alignment and phylogenetic tree construction, the taxonomic status of the three dominant strains was preliminarily determined. (4) the degradation effect of ammonia nitrogen and total phosphorus of the three strains was compared and studied. It was found that the degradation rate of ammonia nitrogen and total phosphorus reached 85 ~ 22.86 when the strain XH3, nitrite YH3, polyphosphorous bacteria JP2 was at 1:1:1. (5) the effect of sodium alginate powder activated carbon fixation method and PVA additive fixation method on the treatment of simulated wastewater was compared. It was found that the treatment effect of the two immobilization methods was similar. The degradation rate of ammonia nitrogen and total phosphorus of the immobilized particles made by the two immobilization methods could reach over 99% after 24 hours. But compared with the immobilized carrier, the mechanical properties of the immobilized particles with PVA additive are better. Under the condition of aeration, the immobilized particles made by PVA additive were immobilized in the reactor. After 24 hours of aeration, the immobilized particles of PVA additive could degrade ammonia nitrogen and total phosphorus in the simulated river of Nanchang city, respectively, and the degradation effect of total phosphorus could reach 82.70g / 79.27.
【学位授予单位】:江西农业大学
【学位级别】:硕士
【学位授予年份】:2015
【分类号】:X522;X172
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