Civil Engineering - Waste Water Engineering - Discussion

Discussion Forum : Waste Water Engineering - Section 6 (Q.No. 21)
21.
Acid regression stage of sludge digestion at a temperature 21°C extends over a period of
15 days
30 days
60 days
90 days.
Answer: Option
Explanation:
No answer description is available. Let's discuss.
Discussion:
2 comments Page 1 of 1.

Fahad said:   5 years ago
Thanks @Shubham Siddharth Nayak.

SHUBHAM SIDDHARTH NAYAK said:   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.
(3)

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