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
Personal Author(s):
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.
Subject Categories:
- Microbiology
- ENVIRONMENTAL HEALTH AND SAFETY
- Organic Chemistry