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Plants aeration period:
Problem:
What is the plant's aeration period?
Solution
The plant's aeration period is the number of hours that the wastewater is aerated during the activated sludge process. These equivalents the hydraulic detention time of the biological reactor
θ= V/Q = 5, 000, 000 l/33.75 × 106 l / day = 0.15 day = 3.6 hours.
Sometimes side of concrete bridges is observed to turn black in colour . What is the main reason being for the phenomenon ?
Explain the Modular Incinerators 1. Prefabricated units with capacities of 4.5 to 107 tons of solid waste/day 2. Most use a system involving two combustion chambers.
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A 4-m-long, 6-cm-diameter cylinder placed normal to the flow is used to measure the velocity of an air stream. If a force of 50 N is measured, the air velocity is nearest (for air
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Q. Granite Tiles for construction material? At every important station for public urinals granite may be used as wall cladding drain and foot rest material. The water sinks at
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