Biodegradation of CVOCs and 1,4-Dioxane Mixtures by Engineered Microbial Communities
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.
Document Details
- Document Type
- Technical Report
- Publication Date
- Jan 31, 2020
- Accession Number
- AD1159156
Entities
People
- Alexandra Polasko
- Ivy Kwok
- Rula Deeb
- Shaily Mahendra
Organizations
- University of California, Los Angeles