Science- ENGINEERING

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Quiz 4 – Guide

1. What is bioremediation? List the advantages and disadvantages of using bioremediation for soil and groundwater contamination.

2. List five recalcitrant organic compounds that can be targeted by bioremediation. 3. List the types of contaminants are amenable to Bioremediation by providing an example

for each type.

4. What types of amendments are typically added to the media to supplement biodegradation process? List amendments and what they are used for and when

5. Choose one of the following processes for Groundwater Bioremediation, describe and explain the process in detail, provide diagrams.

a. Biosparging b. Aerobic c. Anaerobic d. Recirculation systems

6. Choose one of the following processes for Source Bioremediation, describe and explain the process in detail, provide diagrams

a. Land Treatment b. Composting c. Biopiles d. Slurry-Phase Treatment e. Bioventing f. Slurry-Phase Lagoon Aeration

7. Describe one of the bioremediation techniques in detail, provide explanations and draw diagrams

a. Natural Attenuation b. Biostimulation c. Bioaugmentation d. Co-metabolism

8. What are the features of co-metabolism, how do you know it is co-metabolism? 9. Choose one of the following processes for Stormwater Bioremediation, describe and

explain the structure and process in detail, provide diagrams

a. Vegetated Swales b. Rooftop Gardens c. Constructed Wetlands

10. What are the advantages of stormwater bioremediation. List four minimum 11. What are some disadvanatages of stormwater bioremediation?

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12. Match the following scenarios with the best bioremediation technique and explain why you are recommending that? What would be the least likely option for the scenario?

 Natural Attenuation  In-situ Biostimulation  In-situ Bioaugmentation  Ex-situ Bioremediation

A site contaminated with chlorinated organics has completed source removal and primary plume treatment. The plume is now considered stable, but it is unknown if this stability can be sustained. Monitoring shows the presence of degradation intermediates such as dichloroethene, vinyl chloride and ethane.

A site contaminated with chlorinated organics has completed source removal and primary plume treatment. The contaminated aquifer consists of material having low permeability and while the plume is now considered stable there are 3 drinking water wells located in the nearby vicinity. Monitoring shows the presence of degradation intermediates such as dichloroethene, vinyl chloride and ethane in only a few areas.

A site contaminated with jet fuel has groundwater a plume where oxygen levels measured closer to the source are near zero and levels measured farther away in front of the plume are above 3.0 mg/L. The risk from this spill impacting human populations is considered low.

A site is found contaminated with chlorinated compounds known to undergo cometabolic degradation, however sampling indicates that there has been only minimal reduction in the level of these contaminants over the past 2 years. The contamination at this site is not believed to be an immediate risk to human populations.

Soil at a site is heavily contaminated with a mixture of pesticides, creosote and PCBs (polychlorinated biphenyls). A recent test has shown that at lower concentrations, these contaminants can be biologically degraded.