Title

Graywater Treatment Using Biofilm Reactors for Water Recycling in Advanced Life Support

Abstract

Preliminary experiments for the Bio-Regenerative Environmental Air Treatment for Health (BREATHe) system have been conducted. The BREATHe system is part of a multicomponent life support system and is designed to treat contaminated liquid and gas waste streams simultaneously withing a closed life support system. Experiments focused on the BREATHe I system used for treatment of graywater and waste gas from a solids biological treatment process. In this first experimental phase, prototype benchtop reactors were constructed to evaluate surfactant removal. Surfactants, the major component of detergents, are the primary area of concern for graywater treatment. The recirculation rate was varied between 10 and 20 times the influent flow rate to determine the required recirculation rate for 90% COD removal from the influent wastestream. A recirculation rate of 20 times the inflow rate was required for 90% COD removal. Biological growth rate experiments were performed using two commercial laundry detergents (Tide and Cheer). Biological growth was observed in both cases and growth rates increased with increasing concentrations of Tide. Conversely, increases in Cheer concentrations resulted in lower biological growth rates, possibly due to toxicity.

Description:8 pages

Comments

Presented at ASCE Earth and Space Conference. Houston 2004

Keywords

surfactants, biotrickling filter, hygeine

Date of this Version

January 2008

Identifier

ALS-NSCORT: p15

Publisher

American Society of Civil Engineers

ALS NSCORT Project Number

Project 6 - Bio-Regnerative Environmental Treatment for Health-air and water (BREAHTE 1)

Project Lead

M.Katherine Banks

Language

English

ALS NSCORT Series

Published Materials

Administrative Contact

Dave Kotterman, dkotter@purdue.edu

Rights

Copyright 2008 American Society of Civil Engineers. For more information please visit the publisher's copyright policy website at: http://pubs.asce.org/copyright/ or the publisher's home page at: http://pubs.asce.org

Access

This presentation is not available through e-pubs. To purchase a copy of the conference proceedings please contact the American Society of Civil Engineers at: http://www.asce.org/contact.cfm

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