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.
Permanent hard water may be softened by passing it through ...
Conventional tertiary treatment is ...
Hersperidinase is used for ...
Which of the enzyme combination is commercially used for the removal of oxygen? ...
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Sanitizer used specifically for vitreous enamel are ...
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Application of quaternary ammonium compounds as sanitizing agents tends to ...