Question

Which of the following technique is expensive?

(a) Ex-Situ soil remediation

(b) Methanogenesis

(c) Co2 emission

(d) Acetogenesis

The question was posed to me in an interview.

My question comes from Problem Soil Management & Remediation topic in portion Management and Remediation of Problem Soil of Environmental Biotechnology

Answer 1

Right answer is (a) Ex-Situ soil remediation

To explain: Ex-Situ soil remediation process is expensive as it includes transport costs, methanogensis results in production of methane gas by bacteria, Co2 is an environment temperature modulator, Acetogenesis forms acetate from Co2, hence, inexpensive.