Accession Number:

AD1159156

Title:

Biodegradation of CVOCs and 1,4-Dioxane Mixtures by Engineered Microbial Communities

Descriptive Note:

[Technical Report, Final Report]

Corporate Author:

CALIFORNIA UNIV LOS ANGELESGeosyntec Consultants

Report Date:

2020-01-31

Pagination or Media Count:

39

Abstract:

The overarching objective of this limited-scope project was to understand and apply potential treatment synergies to ultimately achieve biodegradation of multiple contaminants in source zones as well as distal plumes. Specifically, we formulated a microbial community to simultaneously or sequentially degrade chlorinated volatile organic compounds CVOCs and 1,4-dioxane across changing redox environments. Some CVOCs have used 1,4-dioxane as a solvent stabilizer. Consequently, 1,4-dioxane is detected as a co-occurring contaminant with CVOCs at many contaminated sites. Anaerobic biological reduction is a common remediation approach for CVOCs like trichloroethene TCE. However, under some conditions, intermediate daughter products, such as cis-1,2-dichloroethene cDCE and vinyl chloride, are accumulated, which may be more toxic than their parent compounds. Aerobic cometabolism of CVOCs requires additional amendments of primary substrates. 1,4-Dioxane is mainly biodegraded under aerobic conditions.

Descriptors:

Subject Categories:

  • Microbiology
  • ENVIRONMENTAL HEALTH AND SAFETY
  • Organic Chemistry

Distribution Statement:

[A, Approved For Public Release]