Denitrification inhibiting sulfate reducing bacteria (SRB) activity in an anaerobic baffled reactor (ABR): Effect factors and mechanism analysis
2008; Elsevier BV; Volume: 136; Linguagem: Inglês
10.1016/j.jbiotec.2008.07.635
ISSN1873-4863
AutoresZhaohan Zhang, Guangmin Liu, Zhongxi Chen, Zhiming Shu, Yujie Feng,
Tópico(s)Ammonia Synthesis and Nitrogen Reduction
ResumoFor investigating the microbial community, interspecific interaction and nitrogen metabolism during the transform process from heterotrophic to synergistic and autotrophic denitrification, a filter was built, and carbon source and sulfur concentration were changed to release the transformation process. The results demonstrated that the transformation process was feasible to keep nitrate nitrogen (NO3−-N) discharge concentration lower than 15 mg L−1, however, nitrite nitrogen (NO2−-N) accumulation and its rate reached 7.85% at initial stages. The dominant denitrification gunes were Methylophilaceae, Thiovulaceae and Hydrogenophilaceae for three processes, respectively, and the microbial interspecific interaction of heterotrophic denitrification was more complex than others. NO2−-N accumulation was confirmed by the low abundance of EC1.7.7.1 and EC1.7.2.1, and the dominance degree of dark oxidation of sulfur compounds and dark sulfide oxidation improved in synthesis and autotrophic denitrifications.
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