Kinetics of anaerobic methane oxidation coupled to denitrification in the membrane biofilm reactor

Youneng Tang, Zhiming Zhang, Bruce Rittmann, Hyung Sool Lee

Research output: Contribution to journalArticle

2 Citations (Scopus)

Abstract

Anaerobic oxidation of methane coupled to denitrification (AOM-D) in a membrane biofilm reactor (MBfR), a platform used for efficiently coupling gas delivery and biofilm development, has attracted attention in recent years due to the low cost and high availability of methane. However, experimental studies have shown that the nitrate-removal flux in the CH4-based MBfR (<1.0 g N/m2-day) is about one order of magnitude smaller than that in the H2-based MBfR (1.1–6.7 g N/m2-day). A one-dimensional multispecies biofilm model predicts that the nitrate-removal flux in the CH4-based MBfR is limited to <1.7 g N/m2-day, consistent with the experimental studies reported in the literature. The model also determines the two major limiting factors for the nitrate-removal flux: The methane half-maximum-rate concentration (K2) and the specific maximum methane utilization rate of the AOM-D syntrophic consortium (kmax2), with kmax2 being more important. Model simulations show that increasing kmax2 to >3 g chemical oxygen demand (COD)/g cell-day (from its current 1.8 g COD/g cell-day) and developing a new membrane with doubled methane-delivery capacity (Dm) could bring the nitrate-removal flux to ≥4.0 g N/m2-day, which is close to the nitrate-removal flux for the H2-based MBfR. Further increase of the maximum nitrate-removal flux can be achieved when Dm and kmax2 increase together.

Original languageEnglish (US)
Pages (from-to)2550-2560
Number of pages11
JournalBiotechnology and bioengineering
Volume116
Issue number10
DOIs
StatePublished - Oct 1 2019

Fingerprint

Denitrification
Methane
Biofilms
Nitrates
Fluxes
Membranes
Biological Oxygen Demand Analysis
Oxidation
Kinetics
Chemical oxygen demand
Gases
Availability
Costs and Cost Analysis
Costs

Keywords

  • anaerobic oxidation of methane
  • biofilm kinetics
  • biofilm model
  • denitrification
  • membrane biofilm reactor

ASJC Scopus subject areas

  • Biotechnology
  • Bioengineering
  • Applied Microbiology and Biotechnology

Cite this

Kinetics of anaerobic methane oxidation coupled to denitrification in the membrane biofilm reactor. / Tang, Youneng; Zhang, Zhiming; Rittmann, Bruce; Lee, Hyung Sool.

In: Biotechnology and bioengineering, Vol. 116, No. 10, 01.10.2019, p. 2550-2560.

Research output: Contribution to journalArticle

Tang, Youneng ; Zhang, Zhiming ; Rittmann, Bruce ; Lee, Hyung Sool. / Kinetics of anaerobic methane oxidation coupled to denitrification in the membrane biofilm reactor. In: Biotechnology and bioengineering. 2019 ; Vol. 116, No. 10. pp. 2550-2560.
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