None of the three most popular methods for treating sludge and converting it into fertilizer is able to produce a final treated product that is
A)biodegradable.
B)sterile.
C)able to be used as a fertilizer.
D)free of heavy metals and non-biodegradable toxins.

Question

Quizplus · Accepted Answer

The question asks for a final treated product that is free of heavy metals and non-biodegradable toxins, but none of the methods presented can accomplish this. Therefore, the correct answer is D. The other options are not relevant to the question, as all three methods are able to produce products that are biodegradable, sterile, and able to be used as fertilizers.

None of the Three Most Popular Methods for Treating Sludge