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DFCCIL_CE _Quiz 37

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Question 1

Activated sludge is the:

Question 2

The MLSS concentration in the aeration tank of extended aeration activated sludge process is 5000 mg/l. If one litre of sample settled in 30 minutes and the measuring cylinder showed a sludge volume of 200 mg/l, then the sludge volume index would be nearly:

Question 3

A township is required to treat 400000 litres of sewage per day which has a 5 day BOD of 140 ppm. The oxidation pond is used for the purpose. The effluent can have a BOD of 15ppm.The loading is to be 25 kg of 5 day BOD per hectare per day. The required area of the pond is

Question 4

Primary treatment of waste water is made with the application of which of the following?

Question 5

The MLSS concentration in the aeration tank of extended aeration activated sludge process is 4000 mg/l. If one litre of sample settled in 30 minutes and the measuring cylinder showed a sludge volume of 200 ml, then the sludge volume index would be nearly:

Question 6

The different actions that take place in anaerobic decomposition process are the following:

a) Alkaline fermentation

b) Acid fermentation

c) Acid regression

d) Methane formation

What is the correct sequence of occurrences of these actions from earlier to later?

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Jun 22AE & JE Exams