wastewater treatment
GATE Civil Engineering · Environmental Engineering - Wastewater Treatment · 2018-2026
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An Activated Sludge Process (ASP) has an inlet wastewater flowrate of 20000 m³/day with a Biochemical Oxygen Demand (BOD) concentration of 250 mg/l. It produces treated wastewater...
A facultative pond system is employed for wastewater treatment. Which of the following statements is/are true:
A community generates 1 million litres/day (MLD) of wastewater. This wastewater is treated using activated sludge process (ASP). The working volume of the aeration tank of the ASP...
A facultative pond system is employed for wastewater treatment. Which of the following statements is/are true:
A community generates 1 million litres/day (MLD) of wastewater. This wastewater is treated using activated sludge process (ASP). The working volume of the aeration tank of the ASP...
Which one of the following products is NOT obtained in anaerobic decomposition of glucose?
A circular settling tank is to be designed for primary treatment of sewage at a flow rate of 10 million liters/day. Assume a detention period of 2.0 hours and surface loading rate...
Activated carbon is used to remove a pollutant from wastewater in a mixed batch reactor, which follows first-order reaction kinetics. At a reaction rate of 0.38 /day, the time (in...
Which one of the following products is NOT obtained in anaerobic decomposition of glucose?
In the context of water and wastewater treatments, the correct statements are:
In the following table, identify the correct set of associations between the entries in Column - 1 and Column-2. Column-1 Column-2 P: Reverse Osmosis III: Concentration Polarizatio...
The wastewater inflow to an activated sludge plant is 0.5 m 3 /s, and the plant is to be operated with a food to microorganism ratio of 0.2 mg/mg-d. The concentration of influent b...
Which one of the following is correct?
An activated sludge process (ASP) is designed for secondary treatment of 7500 m³/day of municipal wastewater. After primary clarifier, the ultimate BOD of the influent, which enter...
The most important type of species involved in the degradation of organic matter in the case of activated sludge process is
The spherical grit particles, having a radius of 0.01 mm and specific gravity of 3.0, need to be separated in a settling chamber. It is given that • g = 9.81 m/s² • the density of...
Two wastewater streams A and B, having an identical ultimate BOD are getting mixed to form the stream C. The temperature of the stream A is 20°C and the temperature of the stream C...