A lumped pathway metabolic model of carbohydrate- And lipid-accumulating phototrophs

Jeremy S. Guest, Mark C.M. Van Loosdrecht, Steven J. Skerlos, Nancy G. Love

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

A lumped pathway metabolic model was developed for carbon-accumulating phototrophic microorganisms. The model (denoted the Phototrophic Process Model, or PPM) was developed using the metabolic pathways of Chlamydomonas reinhardtii (a green alga), which were used to solve for model stoichiometry. The PPM was structured in a manner consistent with the Activated Sludge Models (ASMs), and is presented as a stoichiometric matrix and a set of transformation processes. State variables include functional biomass (XCPO), stored lipids (as triacylglycerol; XTAG), and stored carbohydrates (as polyglucose; XPG) among others. Model structure was refined and kinetic parameters were calibrated and validated based on experiments with a mixed community of phototrophic microorganisms in flat panel photobioreactors (PBRs) operated as cyclostats (i.e., chemostats subjected to a day:night light regime). The model was a reasonable predictor of growth and organic carbon storage/mobilization, but requires additional refinement to enable wastewater treatment modeling.

Original languageEnglish (US)
Title of host publicationWEFTEC 2012 - 85th Annual Technical Exhibition and Conference
PublisherWater Environment Federation
Pages3600-3615
Number of pages16
ISBN (Electronic)9781510870437
StatePublished - Jan 1 2012
Event85th Annual Water Environment Federation Technical Exhibition and Conference, WEFTEC 2012 - New Orleans, United States
Duration: Sep 29 2012Oct 3 2012

Publication series

NameWEFTEC 2012 - 85th Annual Technical Exhibition and Conference
Volume6

Conference

Conference85th Annual Water Environment Federation Technical Exhibition and Conference, WEFTEC 2012
Country/TerritoryUnited States
CityNew Orleans
Period9/29/1210/3/12

Keywords

  • Microalgae
  • Photosynthesis
  • Process model
  • Resource recovery from wastewater

ASJC Scopus subject areas

  • Ecological Modeling
  • Environmental Chemistry
  • Pollution
  • Waste Management and Disposal
  • Water Science and Technology

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