Design an oxidation pond to treat waste water from a community of 15000 people with a B.O.D Contribution of 45 grams/capita/day.

Water is supplied at a rate of 180 liters per capita per day. Determine the detention time and also whether the effluent is suitable for irrigation if 80% B.O.D removal is achived.

1. Pond's L:W 4:1

2. Depth of pond  = 2m

3. Permissible BOD <= 100mg/l for irrigation water

4. Permissible BOD loading rate is 200 kg/hectare/day.

Environmental Engineering 2 2013

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