Home
Class 12
BIOLOGY
Wastewater treatment generates a large q...

Wastewater treatment generates a large quantity of sludge, which can be treated by: 1. anaerobic digesters 2. floc 3. chemicals 4. oxidation pond

A

anaerobic digesters

B

floc

C

chemicals

D

oxidation pond

Text Solution

Verified by Experts

The correct Answer is:
A
The sediment of settling tank is called activated sludge. A part of it is used as inoculum in aeration tanks. The remaining is passed into a large tank called anaerobic sludge digesters.
Promotional Banner

Similar Questions

Explore conceptually related problems

What would happen if oxygen availability to activated sludge flocs is reduced? 1) It will slow down the rate of degradation of organic matter 2) The center of flocs will becomes anoxic, which would cause death of bacteria and eventually breakage of flocs 3) Flocs would increase in size as anerobic bacteria would grow around flocs 4) Protozoa would grow in large numbers

How many 2 digit even numbers can be formed from the digits 1, 2, 3, 4, 5 if the digits can be repeated?

Find the sum of all 4-digit numbers that can be formed using digits 1, 2, 3, 4, and 5 repetitions not allowed?

Match column I with column II and select the correct answer from the given codes. {:(Column I,Column II),(A. "The stage in which of physical treatment of sewage is done",(i)"Anaerobic digestion activated sludge and production of biogas"),(B."The stage in which biological treatment of sewage is done",(ii)"Activated sludge"),(C."Name of the sediment in primary treatment",(iii)"Aeration tanks"),(D."It is carried to aeration tanks from primary",(iv)"Primary effluent"),(E."Name of the sediment in secondary treatment",(v)"Primary sludge"),(F."site of flocs growth",(vi)"Secondary treatment"),(G."Function of sludge digester",(vii)"Primary treatment"):}

Find general value of theta which satisfies both sin theta = -1//2 and tan theta=1//sqrt(3) simultaneously.

Consider the nitration of benzene using mixed con H_(2)SO_(4) and HNO_(3) if a large quantity of KHSO_(4) is added to the mixture ,the rate of nitration will be