mass balance

A 2m x 2m tank of 3 m height has inflow, outflow and stirring mechanisms. Initially, the tank was half-filled with fresh water. At t = 0, an inflow of a salt solution of concentrat...

A system of seven river segments is shown in the schematic diagram. The Rᵢ's, Qᵢ's, and Cᵢ's (i = 1 to 7) are the river segments, their corresponding flow rates, and concentrations...

A sewage treatment plant receives sewage at a flow rate of 5000 m 3 /day. The total suspended solids (TSS) concentration in the sewage at the inlet of primary clarifier is 200 mg/L...

A process equipment emits, 5 kg/h of volatile organic compounds (VOCs). If a hood placed over the process equipment captures 95% of the VOCs, then the fugitive emission in kg/h is

At a municipal waste handling facility, 30 metric ton mixture of food waste, yard waste, and paper waste was available. The moisture content of this mixture was found to be 10%. Th...

The hardness of a ground water sample was found to be 420 mg/L as $$CaCO_3$$. A softener containing ion exchange resins was installed to reduce the total hardness to 75 mg/L as $$C...

The average surface area of a reservoir in the month of June is 20 km 2 . In the same month, the average rate of inflow is 10 m 3 /s, outflow rate is 15 m 3 /s, monthly rainfall is...