Lec7 Flashcards
Technique of extracting metals like gold, iron, copper from ores using microorganisms
Biomining
Biomining advantages عددي
- Ecofriendly
- Reduced operating costs
- Improved recovery
- Permits extraction from low grade ores
Biomining process in which bioreactors are used to separate metals from water systems
Biohydronetallurgy
found in nature in association with minerals containing arsenopyrite
Gold (Au)
best choice for copper biomining is?
the acidophilic archaea Sulfolobus metallicus and Sulfolobus sedula.
industrial microbial leaching process of minerals
bioleaching
Why indigenous M.Os degradation rate is slow?
because:
1. Their initial population is less than 1% of total microbial
2. unavailability of optimal nutrients
cultures are grown in small quantities by a fermentation process before application on the contaminated site.
T/F?
F, large quantities
basic factors influencing the biodegradation of crude oil and oil derived products
1.Chemical structure of oil hydrocarbons.
2. Concentration of cpd.
3. Availability of hydrocarbons for microbial cells.
4. Toxicity to microflora.
5. Microbial potential (enzyme activity, biomass
concentration, population variability).
6. Physicochiemical environmental parameters
Branched alkanes are biodegraded faster than straight alkanes .
T/F?
F, slower than straight alkanes
Is helpful in the biodegradation of PAHs
Genus Mycobacterium
PAHs ( naphthalene) is degraded under ……….. conditions using sulfate as an electron acceptor
Anaerobic conditions
Anaerobic degradation possible for heterocyclic compounds such as?
Indole
cheap robust detection systems that are selective and highly sensitive.
Bacterial biosensors
One developed technique uses ………….. to quantitatively assay for naphthalene using bioluminescence
Pseudomonas fluorescens HK44
