Comparative modeling of biological nutrient removal from landfill leachate using a circulating fluidized bed bioreactor (CFBBR)

Ahmed Eldyasti, Mehran Andalib, Hisham Hafez, George Nakhla, Jesse Zhu

Research output: Journal PublicationArticlepeer-review

24 Citations (Scopus)

Abstract

Steady state operational data from a pilot scale circulating fluidized bed bioreactor (CFBBR) during biological treatment of landfill leachate, at empty bed contact times (EBCTs) of 0.49, and 0.41d and volumetric nutrients loading rates of 2.2-2.6kgCOD/(m3d), 0.7-0.8kgN/(m3d), and 0.014-0.016kgP/(m3d), was used to calibrate and compare developed process models in BioWin® and AQUIFAS®. BioWin® and AQUIFAS® were both capable of predicting most of the performance parameters such as effluent TKN, NH4-N, NO3-N, TP, PO4-P, TSS, and VSS with an average percentage error (APE) of 0-20%. BioWin® underpredicted the effluent BOD and SBOD values for various runs by 80% while AQUIFAS® predicted effluent BOD and SBOD with an APE of 50%. Although both calibrated models, confirmed the advantages of the CFBBR technology in treating the leachate of high volumetric loading and low biomass yields due to the long solid retention time (SRT), both BioWin® and AQUIFAS® predicted the total biomass and SRT of CFBBR based on active biomass only, whereas in the CFBBR runs both active as well as inactive biomass accumulated.

Original languageEnglish
Pages (from-to)140-149
Number of pages10
JournalJournal of Hazardous Materials
Volume187
Issue number1-3
DOIs
Publication statusPublished - 15 Mar 2011
Externally publishedYes

Keywords

  • AQUIFAS
  • BioWin
  • Circulating fluidized bed
  • Denitrification
  • Landfill leachate
  • Nitrification

ASJC Scopus subject areas

  • Environmental Engineering
  • Environmental Chemistry
  • Waste Management and Disposal
  • Pollution
  • Health, Toxicology and Mutagenesis

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