Evaluation of a common commercial surfactant in a water recycle system

Tony Rector, Andrew Jackson, Ken Rainwater, Karen Pickering

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

Abstract

The fate of a common commercial surfactant was investigated in the biological reactors of a water recycle system. A NO 2 - reducing packed-bed bioreactor was employed to evaluate degradation of surfactant present in a typical greywater stream. The research was conducted to determine if an alternative commercial surfactant could be used in a biological water recycle system proposed for space travel in place of the current surfactant. The commercial soap used in the research was Pert Plus® for Kids (PPK), which contains sodium laureth sulfate (SLES) as the active surfactant. Experiments included a combination of microcosm studies as well as a continuous-flow packed-bed bioreactor. The hydraulic retention time of the packed-bed bioreactor was varied through changes in flow rate to yield different steady-state values for NO 2-N, TOC, and COD. Steady-state values will allow the determination of the bacterial kinetic parameters. Initial results suggest that the commercial surfactant may be difficult to treat in the time frame of typical biological systems. NO 2 - reduction was favorable in the packed-bed reactor, but TOC removal rates did not correspond to the NO 2 - removal. It is theorized that, due to its high K oc value (1200), SLES has an affinity to absorb to the media contained in the bed, which in turn allows for adsorption of the surfactant. Future research will include development of an isotherm model to characterize the adsorption rates and correlate them to surfactant removal.

Original languageEnglish
Title of host publicationConference Proceedings - Joint 2002 CSCE/ASCE International Conference on Environmental Engineering - An International Perspective on Environmental Engineering
EditorsW.H. Stiver, R.G. Zytner
Pages1005-1012
Number of pages8
StatePublished - 2002
EventJoint 2002 CSCE/ASCE International Conference on Environmetal Engineering - An International Perspective on Enviromental Engineering - Niagara Falls, Ont., Canada
Duration: Jul 21 2002Jul 24 2002

Publication series

NameConference Proceedings - Joint 2002 CSCE/ASCE International Conference on Environmental Engineering - An International Perspective on Environmental Engineering

Conference

ConferenceJoint 2002 CSCE/ASCE International Conference on Environmetal Engineering - An International Perspective on Enviromental Engineering
CountryCanada
CityNiagara Falls, Ont.
Period07/21/0207/24/02

Keywords

  • Commercial Surfactants
  • Nitrite Removal
  • Packed-bed Reactor
  • Surfactant Degradation
  • Water Recycle System

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  • Cite this

    Rector, T., Jackson, A., Rainwater, K., & Pickering, K. (2002). Evaluation of a common commercial surfactant in a water recycle system. In W. H. Stiver, & R. G. Zytner (Eds.), Conference Proceedings - Joint 2002 CSCE/ASCE International Conference on Environmental Engineering - An International Perspective on Environmental Engineering (pp. 1005-1012). (Conference Proceedings - Joint 2002 CSCE/ASCE International Conference on Environmental Engineering - An International Perspective on Environmental Engineering).