<p><span>Activated sludge should have the ability to settle quickly so that it can </span></p>&l…

The major gas in biogas production is ___________.</h2></div>

<span>Biodegradable pollutant among the following is _______.</span></h2></div>

Large holes in Swiss cheese are formed due to production of a large amount of <span class="katex"><sp…

<span><br> </span><span>1.Manure fertilizer,  biofertilizer,  mycorrh…

In treatment of waste, biological treatment is</h2></div>

What are bio-fertilizers? Describe their role in agriculture. Why are they preferred to chemical fertilizers?</h2>…

Explain biogas plant with a labelled diagram.</h2></div>