What must occur to the primary effluent in the aeration tank before it is moved to the settling tank?
Once the BOD of sewage or waste water is reduced significantly, the effluent is then passed into a settling tank.
Question 182 of 455
📘 CLASS XII
The specific type of bacteria responsible for digesting the activated sludge anaerobically are:
Here, other kinds of bacteria, which grow anaerobically, digest the bacteria and the fungi in the sludge... These bacteria are collectively called methanogens.
Question 183 of 455
📘 CLASS XII
What are the two major governmental initiatives mentioned for river pollution control in India?
The Ministry of Environment and Forests has initiated Ganga Action Plan and Yamuna Action Plan.
Question 184 of 455
📘 CLASS XII
Microbes are utilized in the industrial production of organic acids, alcohols, and:
Microbes are also used for commercial and industrial production of certain chemicals like organic acids, alcohols and enzymes.
Question 185 of 455
📘 CLASS XII
The major gas components produced by methanogens in biogas production, besides methane, are H2 and:
Methanogens produce large amount of methane along with CO2 and H2.
Question 186 of 455
📘 CLASS XII
The substance that keeps on rising in the biogas plant tank as gas is produced is known as the:
A floating cover is placed over the slurry, which keeps on rising as the gas is produced.
Question 187 of 455
📘 CLASS XII
The use of biocontrol measures is preferable to chemical pesticides because biocontrol leads to:
The organic farmer... works to create a system where the insects that are sometimes called pests are not eradicated, but instead are kept at manageable levels.
Question 188 of 455
📘 CLASS XII
Which virus type is characterized by being species-specific and having a narrow insecticidal spectrum?
Baculoviruses are pathogens... These viruses are excellent candidates for species-specific, narrow spectrum insecticidal applications.
Question 189 of 455
📘 CLASS XII
*Rhizobium* bacteria, when associated with legumes, help enrich the soil by contributing:
Rhizobium fix atmospheric nitrogen into organic forms.
Question 190 of 455
📘 CLASS XII
The genus *Glomus* is mentioned in relation to its formation of:
