Who developed the treatment technique for industrial and sewage waste water?</h2></div>

Which one of the following is useful in rice fields?</h2></div>

Fertilizers applied to crop plants, pollute</h2></div>

pH favourable for fermentation in biogas plant is</h2></div>

Which of the following is formed during the process of anaerobic fermentation?</h2></div>

Cyanobacteria helps farmers by</h2></div>

The crushed food for obtaining malt is called wort.

Activated sludge should have the ability to settle quickly so that it can:</h2></div>