Environmental Science and Engineering
2024 · Paper 1
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Complete GATE ES 2024 Paper 1 overview, original pages and practice · Timed previous-paper practice
Questions 52–54 of 65. Imported answers require review unless explicitly marked reviewed.
Question 52
Open questionESNAT2 marksNeeds review
The concentration of Ozone corresponding to a mixing ratio of 120 ppb at pressure of 1 atmosphere and temperature of 25°C is ______ μg/m³ (rounded off to 1 decimal place).
Atomic weight of oxygen = 16; R= 8.314 J/K-g.mole.
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One million liters per day (MLD) of wastewater with a soluble BOD of 200 mg/L is treated in an activated sludge process. The BOD of treated wastewater is 20 mg/L. The observed yield coefficient of the biological system is 0.35.
The daily biomass generation in the system is ______ kg (an integer value).
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An industry discharges 2 million liters per day (MLD) of wastewater with a temperature of 45°C and a pH of 2, whereas the neighboring industry produces 3 MLD of wastewater with a temperature of 30°C and pH of 8. If both the wastewaters are mixed and carried through a pipeline, then the resultant pH of mixed wastewater is ______ (rounded off to 2 decimal places).
Neglect buffering capacity of the system and the temperature effect on pH.
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