Aerobic/anaerobic/aerobic sequenced biodegradation of a mixture of chlorinated ethenes, ethanes and methanes in batch bioreactors

- Aerobic/anaerobic/aerobic treatment biodegrades complex chlorinated solvent mixture.
- First aerobic step: low- and medium-chlorinated solvents degraded by cometabolism.
- Anaerobic step: tetrachloroethene degraded to cis-dichloroethene or trichloroethene.
- Second aerobic step: cis-dichloroethene or trichloroethene degraded by cometabolism.
- The anaerobic step is likely fed with dead cells grown during the aerobic step.