+1 vote
in Environmental Biotechnology by (64.7k points)
Which of the following has a helical ridge?

(a) Vertical reactor

(b) Rotating drum

(c) Horizontal reactor

(d) Recycling

I got this question in semester exam.

This key question is from Aerobic Treatment of Solid Wastes in division Biotechnology for Solid Waste Management of Environmental Biotechnology

1 Answer

+2 votes
by (736k points)
selected by
Best answer
Correct choice is (b) Rotating drum

The explanation is: Rotating drum has helical ridges on the inside which transports the waste in a helical manner with forced aeration and the mixing starts intensively which is then followed by self-heating, whereas, in vertical reactor, waste flows vertically, waste is loaded in a horizontal reactor with a wheel loader, and recycling is used to recycle the wastes and not produce compost.

Related questions

We welcome you to Carrieradda QnA with open heart. Our small community of enthusiastic learners are very helpful and supportive. Here on this platform you can ask questions and receive answers from other members of the community. We also monitor posted questions and answers periodically to maintain the quality and integrity of the platform. Hope you will join our beautiful community