The optimal ecological factors and the denitrification populationof a denitrifying process for sulfate reducing bacteriainhibition

International Conference on Energy Engineering and Environmental Protection 2017

能源学;生态环境科学

Li, Chunying^1

School of Energy and Civil Engineering, Harbin University of Commerce, Harbin

150028, China^1

关键词: Anaerobic baffled reactor;    Concentration ratio;    Continuous flows;    Denitrifying bacteria (DNB);    Dominant species;    Ecological factors;    Sulfate reducing;    Sulfate reduction;   

Others  :  https://iopscience.iop.org/article/10.1088/1755-1315/121/2/022010/pdf
DOI  :  10.1088/1755-1315/121/2/022010

学科分类：环境科学（综合）

来源: IOP

【 摘 要 】

SRB have great negative impacts on the oil production in Daqing Oil field. A continuous-flow anaerobic baffled reactors (ABR) are applied to investigate the feasibility and optimal ecological factors for the inhibition of SRB by denitrifying bacteria (DNB). The results showed that the SO42- to NO3- concentration ratio (SO42-/NO3-) are the most important ecological factor. The input of NO3- and lower COD can enhance the inhibition of S2-production effectively. The effective time of sulfate reduction is 6 h. Complete inhibition of SRB is obtained when the influent COD concentration is 600 mg/L, the SO42-/NO3- is 1/1 (600 mg/L for each), N is added simultaneously in the 2# and the 5# ABR chambers. By extracting the total DNA of wastewater from the effective chamber, 16SrDNA clones of a bacterium had been constructed. It is showed that the Proteobacteria accounted for eighty- four percent of the total clones. The dominant species was the Neisseria. Sixteen percent of the total clones were the Bacilli of Frimicutes. It indicated that DNB was effective and feasible for SRB inhibition.