Question

Which of the following treatment shouldn’t be used for pre-treatment of solid waste?

(a) Mechanical treatment

(b) Biological treatment

(c) Thermal treatment

(d) Heavy metal treatment

I have been asked this question in an interview for job.

This key question is from Waste Disposal by Sanitary Landfilling in portion Biotechnology for Solid Waste Management of Environmental Biotechnology

Answer 1

Correct answer is (d) Heavy metal treatment

The best I can explain: Heavy metal treatment can’t be used for pre-treatment of solid waste as it poses a great threat to the environment because of its toxicity, whereas, mechanical treatment, biological treatment, thermal treatment to reduce the amount of biodegradable organic matter to reduce the environmental pollution.