In the waste water treatment plant (WWTP) air is pumped into water to</h2></div>

<div>What are microorganisms? </div></h2></div>

Rhizobium _______</h2></div>

Select the correct statement from the following.</h2></div>

Broad-spectrum antibiotics can kill only a small number of pathogens.

Passage of effluents into oxidation tank is for</h2></div>

Secondary treatment of the sewage is called biological treatment. Justify the statement and explain the process.</h2&…

Why are blue green algae not popular as biofertilisers? </h2></div>