Microbial Remediation — Prelims Questions

Consider the following statements about microbial remediation: 1. Pseudomonas bacteria are primarily used for heavy metal removal from contaminated soil 2. Bioaugmentation involves adding nutrients to enhance existing microbial populations 3. Microbial fuel cells can simultaneously treat wastewater and generate electricity 4. Extremophiles can function in high-temperature industrial waste treatment Which of the statements given above are correct?

Which of the following best describes the primary advantage of in-situ microbial remediation over ex-situ treatment?

In the context of microbial remediation, what is the significance of biosurfactants?

Consider the following pairs of microorganisms and their primary remediation applications: 1. Alcanivorax borkumensis - Marine oil spill cleanup 2. Aspergillus niger - Heavy metal biosorption 3. Methanogenic archaea - Anaerobic organic waste treatment 4. Chlorella vulgaris - Nitrogen and phosphorus removal How many of the above pairs are correctly matched?

Which of the following factors would most likely limit the effectiveness of microbial remediation in treating petroleum hydrocarbon contamination?