The methods used for biological treatment are
...The methods used for biological treatment are
lagoon
activated sludge process
oxidation ditches
all of these
Correct answer is D
No explanation has been provided for this answer.
Discoloration can be achieved by using ...
Sulphydryl oxidase is used for ...
The common method(s) used for disinfection in waste water treatment plants are ...
Application of quaternary ammonium compounds as sanitizing agents tends to ...
Zeolite softening process removes ...
Which is true about rennet? ...
Both temporary and permanent hardness of water can be removed by ...
Which of the enzyme combination is commercially used for the removal of oxygen? ...