Environmental Biotechnology Questions on “Use of Remediation Techniques”.
1. Soil banking technique is usually faster than Land farming.
a) True
b) False
Answer: a
Clarification: Soil banking technique is technically adaptable to a wide range but better suited to colder and wetter climates and is also faster than Land farming method.
2. To increase the speed and efficiency of Soil banking method ___________ is used.
a) Engineered biopiling
b) Soil slurry bioreactors
c) Land farming
d) Bio-sparging
Answer: a
Clarification: To increase the speed and efficiency of Soil banking method when the space is limited, certain techniques like Engineered biopiling is often used, Soil slurry bioreactors and Land farming are another type technique used under ex-situ approaches and Bio-sparging is an In-situ technique.
3. In Soil slurry reactor, the slurry is thickened and dewatered using __________
a) Clarifiers
b) Biosparging
c) Bio-accumulation
d) Bio-degradation
Answer: a
Clarification: Soil slurry reactors contain slurry which is usually thickened and dewatered using Clarifiers and presses, whereas Biosparging is the technique which is used to re-mediate contamination at the boundary level of water table, Immobilization uses Bio-accumulation processes, bio-degradation is the process that leads to degradation of compounds with the help of bacteria.
4. Bio-remediation can be used at the sites contaminated with petroleum hydrocarbons.
a) True
b) False
Answer: a
Clarification: Petroleum hydrocarbons contaminated sites are removed by bioremediation which uses microorganisms and microbes generally use these petroleum hydrocarbons as nutrition source for growth thereby, degrading them from the environment.