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.