Bioremediation

Home

Get App

Take Quiz

Create

monitored natural attenuation
- isolation/containment
- contaminant mobility
- biodegradation/transformation under intrinsic conditions
- presence of required microbial community
- presence of required nutrients
- advantages:
- ease
- low cost
- disadvantages:
- slow
- public perception
- long term monitoring required
engineered remediation ex-situ
- accessibility
- rate of biodegradation
- is a microbial consortium required
- are the microbial end products stable and non-toxic
- will microbial end products cause adverse geochemical effects
- excessive biomass production
- advantages:
- controlled environment
- ease of monitoring
- disadvantages:
- not applicable to large plumes
- not applicable to low level concentrations
- cost
- complexity
crucial parameters of operational effectiveness of organic waste treatment, electron donor
- bacterial metabolism
- bacterial electron transfer
- performance of the cation selective membrane
- intrinsic electrical resistance of the system
- efficiency of the cathode oxidation step
engineered remediation in-situ
- extent of contaminant plume
- are environmental parameters conducive
- accessibility of contaminant
- are the appropriate populations present
- advantages:
- applicable to large plumes
- applicable to low level concentration
- disadvantages:
- uncontrolled environment
- cost
- complexity
- difficulty of monitoring
- biofouling
typical effects of electron donor amendments into the subsurface
- stimulation of non-target microbial communities in the near-well environment using precious electron donor
- loss of hydraulic conductivity through biofouling decreasing zone of impact
- increased activity of fermenters, iron reducers, sulfate reducers and methanogens causing additional reduction in water quality
- solubilization and mobilization or normally immobile toxic metals
the biogeochemical characterisitics of an ideal electron donor
- highly soluble
- non-fermentable
- biocidal at elevated concentrations
- limit its stimulatory effects to the target contaminant
- should not impact the geochemistry of the environment

Author

cornpops

114662

Card Set

Bioremediation

Description

general microbiology midterm 2

Updated

2011-11-09T08:47:07Z