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Assessment of heterotrophic growth supported by soluble microbial products in anammox biofilm using multidimensional modeling

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Abstract
Anaerobic ammonium oxidation (anammox) is known to autotrophically convert ammonium to dinitrogen gas with nitrite as the electron acceptor, but little is known about their released microbial products and how these are relative to heterotrophic growth in anammox system. In this work, we applied a mathematical model to assess the heterotrophic growth supported by three key microbial products produced by bacteria in anammox biofilm (utilization associated products (UAP), biomass associated products (BAP), and decay released substrate). Both One-dimensional and two-dimensional numerical biofilm models were developed to describe the development of anammox biofilm as a function of the multiple bacteria-substrate interactions. Model simulations show that UAP of anammox is the main organic carbon source for heterotrophs. Heterotrophs are mainly dominant at the surface of the anammox biofilm with small fraction inside the biofilm. 1-D model is sufficient to describe the main substrate concentrations/fluxes within the anammox biofilm, while the 2-D model can give a more detailed biomass distribution. The heterotrophic growth on UAP is mainly present at the outside of anammox biofilm, their growth on BAP (HetB) are present throughout the biofilm, while the growth on decay released substrate (HetD) is mainly located in the inner layers of the biofilm.
Keywords
AUTOTROPHIC NITRIFYING BIOFILMS, EXTRACELLULAR POLYMERIC SUBSTANCES, WASTE ACTIVATED-SLUDGE, OXIDIZING BACTERIA, METHANE PRODUCTION, NITROGEN REMOVAL, HYDROLYSIS RATE, INERT BIOMASS, AMMONIUM, REACTOR

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MLA
Liu, Yiwen et al. “Assessment of Heterotrophic Growth Supported by Soluble Microbial Products in Anammox Biofilm Using Multidimensional Modeling.” SCIENTIFIC REPORTS 6 (2016): n. pag. Print.
APA
Liu, Yiwen, Sun, J., Peng, L., Wang, D., Dai, X., & Ni, B.-J. (2016). Assessment of heterotrophic growth supported by soluble microbial products in anammox biofilm using multidimensional modeling. SCIENTIFIC REPORTS, 6.
Chicago author-date
Liu, Yiwen, Jing Sun, Lai Peng, Dongbo Wang, Xiaohu Dai, and Bing-Jie Ni. 2016. “Assessment of Heterotrophic Growth Supported by Soluble Microbial Products in Anammox Biofilm Using Multidimensional Modeling.” Scientific Reports 6.
Chicago author-date (all authors)
Liu, Yiwen, Jing Sun, Lai Peng, Dongbo Wang, Xiaohu Dai, and Bing-Jie Ni. 2016. “Assessment of Heterotrophic Growth Supported by Soluble Microbial Products in Anammox Biofilm Using Multidimensional Modeling.” Scientific Reports 6.
Vancouver
1.
Liu Y, Sun J, Peng L, Wang D, Dai X, Ni B-J. Assessment of heterotrophic growth supported by soluble microbial products in anammox biofilm using multidimensional modeling. SCIENTIFIC REPORTS. 2016;6.
IEEE
[1]
Y. Liu, J. Sun, L. Peng, D. Wang, X. Dai, and B.-J. Ni, “Assessment of heterotrophic growth supported by soluble microbial products in anammox biofilm using multidimensional modeling,” SCIENTIFIC REPORTS, vol. 6, 2016.
@article{8030894,
  abstract     = {Anaerobic ammonium oxidation (anammox) is known to autotrophically convert ammonium to dinitrogen gas with nitrite as the electron acceptor, but little is known about their released microbial products and how these are relative to heterotrophic growth in anammox system. In this work, we applied a mathematical model to assess the heterotrophic growth supported by three key microbial products produced by bacteria in anammox biofilm (utilization associated products (UAP), biomass associated products (BAP), and decay released substrate). Both One-dimensional and two-dimensional numerical biofilm models were developed to describe the development of anammox biofilm as a function of the multiple bacteria-substrate interactions. Model simulations show that UAP of anammox is the main organic carbon source for heterotrophs. Heterotrophs are mainly dominant at the surface of the anammox biofilm with small fraction inside the biofilm. 1-D model is sufficient to describe the main substrate concentrations/fluxes within the anammox biofilm, while the 2-D model can give a more detailed biomass distribution. The heterotrophic growth on UAP is mainly present at the outside of anammox biofilm, their growth on BAP (HetB) are present throughout the biofilm, while the growth on decay released substrate (HetD) is mainly located in the inner layers of the biofilm.},
  articleno    = {27576},
  author       = {Liu, Yiwen and Sun, Jing and Peng, Lai and Wang, Dongbo and Dai, Xiaohu and Ni, Bing-Jie},
  issn         = {2045-2322},
  journal      = {SCIENTIFIC REPORTS},
  keywords     = {AUTOTROPHIC NITRIFYING BIOFILMS,EXTRACELLULAR POLYMERIC SUBSTANCES,WASTE ACTIVATED-SLUDGE,OXIDIZING BACTERIA,METHANE PRODUCTION,NITROGEN REMOVAL,HYDROLYSIS RATE,INERT BIOMASS,AMMONIUM,REACTOR},
  language     = {eng},
  pages        = {11},
  title        = {Assessment of heterotrophic growth supported by soluble microbial products in anammox biofilm using multidimensional modeling},
  url          = {http://dx.doi.org/10.1038/srep27576},
  volume       = {6},
  year         = {2016},
}

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