Water-and-waste-water Questions Set 33:
The theoretical oxygen demand of a 0.001 mol/lit glucose solution is
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Which method is used to measure suspended solids?
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What is the typical filtration rate of a slow sand filter in liters of water per square meter?
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The amount of CO2 generated (in kg) while completely oxidizing one kg of CH4 to the end products is (up to two decimal places) ______.
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The most important type of species involved in the degradation of organic matter in the case of activated sludge process is
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The 5-day Biochemical Oxygen Demand (BOD) of a wastewater sample is obtained as 190 mg/L (with k = 0.01 h-1). The ultimate oxygen demand (mg/L) of the sample will be:
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After which of the following treatment units in a water treatment plant is the turbidity typically maximum?
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A sewer with a diameter of 400 mm and a slope of 1 in 400, running half-full, has a flow velocity of 0.82 m/s. What will be the velocity of flow if the slope is changed to 1 in 100?
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For a colony of 10,000 people with a sewage flow rate of 200 L/person/day, BOD of applied sewage of 300 mg/L, and organic loading of 300 kg/day/hectare, the area of an oxidation pond required to treat the sewage is:
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Consider the following statements about the appropriate methods for removal of fluorides from water:
1. Addition of alum and lime followed by clarification.
2. Passing the water through beds of activated alumina.
Which of these statements is/are correct?
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