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Q1: Pick up the correct statement from the following :

A Rate of digestion of slugde is more at higher temperature

B Thermophilic organisms digest the sludge if the temperature ranges from 40° to 60°C

C Mesophilic organisms digest the sludge if the temperature is between 25° and 40°C

D 90% of digestion takes place in 30 days at 29°C, the optimum mesophilic temperature

E All the above.

ANS:E - All the above.

"All the above." All of the statements are true regarding the digestion of sludge:

  1. Rate of digestion of sludge is more at higher temperature: This statement reflects the general principle that higher temperatures typically lead to faster rates of digestion in biological processes.
  2. Thermophilic organisms digest the sludge if the temperature ranges from 40° to 60°C: Thermophilic organisms are adapted to higher temperatures and are active in the temperature range mentioned.
  3. Mesophilic organisms digest the sludge if the temperature is between 25° and 40°C: Mesophilic organisms are active in moderate temperatures, making them effective at digesting sludge within the specified temperature range.
  4. 90% of digestion takes place in 30 days at 29°C, the optimum mesophilic temperature: This statement highlights the efficiency of mesophilic digestion at the specified temperature.



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