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      Nitrogen source effects on the denitrifying anaerobic methane oxidation culture and anaerobic ammonium oxidation bacteria enrichment process.

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          Abstract

          The co-culture system of denitrifying anaerobic methane oxidation (DAMO) and anaerobic ammonium oxidation (Anammox) has a potential application in wastewater treatment plant. This study explored the effects of permutation and combination of nitrate, nitrite, and ammonium on the culture enrichment from freshwater sediments. The co-existence of NO3(-), NO2(-), and NH4(+) shortened the enrichment time from 75 to 30 days and achieved a total nitrogen removal rate of 106.5 mg/L/day on day 132. Even though ammonium addition led to Anammox bacteria increase and a higher nitrogen removal rate, DAMO bacteria still dominated in different reactors with the highest proportion of 64.7% and the maximum abundance was 3.07 ± 0.25 × 10(8) copies/L (increased by five orders of magnitude) in the nitrite reactor. DAMO bacteria showed greater diversity in the nitrate reactor, and one was similar to M. oxyfera; DAMO bacteria in the nitrite reactor were relatively unified and similar to M. sinica. Interestingly, no DAMO archaea were found in the nitrate reactor. This study will improve the understanding of the impact of nitrogen source on DAMO and Anammox co-culture enrichment.

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          Author and article information

          Affiliations
          [1 ] CAS Key Laboratory for Urban Pollutant Conversion, Department of Chemistry, University of Science and Technology of China, Hefei, Anhui, 230026, People's Republic of China.
          [2 ] Advanced Laboratory for Environmental Research and Technology, USTC-CityU, Suzhou, Jiangsu, 215213, People's Republic of China.
          [3 ] CAS Key Laboratory for Urban Pollutant Conversion, Department of Chemistry, University of Science and Technology of China, Hefei, Anhui, 230026, People's Republic of China. rzeng@ustc.edu.cn.
          [4 ] Advanced Laboratory for Environmental Research and Technology, USTC-CityU, Suzhou, Jiangsu, 215213, People's Republic of China. rzeng@ustc.edu.cn.
          [5 ] Collaborative Innovation Center of Suzhou Nano Science and Technology, Suzhou, Jiangsu, 215123, People's Republic of China. rzeng@ustc.edu.cn.
          Journal
          Appl. Microbiol. Biotechnol.
          Applied microbiology and biotechnology
          Springer Nature
          1432-0614
          0175-7598
          May 2017
          : 101
          : 9
          10.1007/s00253-017-8163-2
          10.1007/s00253-017-8163-2
          28168315

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