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2 cards from this section. Quick, good the night before a test.
What is mass balance?
Think about how we track everything that goes in and out.
How does rainwater affect sludge concentration?
Consider the mixing of substances.
What does mass balance ensure in a system?
Think of the conservation of mass principle.
True or False? Rainwater has no effect on contaminant concentration.
Consider the definition of concentration and dilution.
A waste tank initially has 500,000 kg of sludge with 20% moisture content. If 500 m³ of rainwater enters, calculate the final concentration of chemical A if it was initially 300 mg/kg in the dry weight.
Break down the problem into parts. Determine initial mass and moisture before calculating.
Consider a scenario where the rainwater introduced has 100 mg of chemical A per liter. How does this impact the mass balance?
Account for additional inputs when estimating final concentrations.
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