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Acid regression stage of sludge digestion at a temperature 21 C...

This question belongs to Civil Engineering Waste Water Engineering
Waste Water Engineering
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Acid regression stage of sludge digestion at a temperature 21°C extends over a period of

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Correct Answer: Option D
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1 Comment
Atif Muneer
Atif Muneer 5 years ago
Acid fermentation-15 days (half month).

Acid regression-90 days (3 months).

Alkaline fermentation-30 days (1months).

Total time required for complete digestion in digestive unit=4 and half months.
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