The following table gives various components of Municipal Solid Waste (MSW) and a list of treatment/separation techniques.
| Component of MSW | Treatment/separation technique |
|---|---|
| P - Ferrous metals | i - Incineration |
| Q - Aluminum and copper | ii - Rapid composting |
| R - Food waste | iii - Eddy current separator |
| S - Cardboard | iv - Magnetic separator |
The CORRECT match is
The primary air pollutant(s) is/are
For assessing the compliance with the emissions standards of incineration plants, a correction needs to be applied to the measured concentrations of air pollutants. The emission standard (based on 11% Oxygen) for HCl is 50 mg/Nm3 and the measured concentrations of HCl and Oxygen in flue gas are 42 mg/Nm3 and 13%, respectively.
Assuming 21% Oxygen in air, the CORRECT statement is:
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 days) required to remove the pollutant by 95% is _______________ (rounded off to 1 decimal place).