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

Those animals or plants or microbes which destroy crops and their products are known as?</h2></div>

Sewage treatment process in which part of decomposer bacteria is recycled into starting of the process is called.</h2…

Fertility of paddy fields is improved by addition of</h2></div>

Methanogens converts</h2></div>

Draw a neat labelled diagram of a typical biogas plant.</h2></div>

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

What is the full form of TPA?