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##### Reference no: EM13546935

1.Facultative stabilization ponds with a total surface area of 6.0 ha serve a community with a waste discharge of 530 m cubed/d at a BOD of 280 mg/l. Calculate the BOD loading and days of winter storage available between the 0.6 and 1.5 m depths, assuming a daily water loss of 0.30 cm by evaporation and seepage.

2.State the two main reasons why an activated sludge system is operated at a relatively low food/microorganism ratio

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