Review

The majority of GHG emissions are associated with burning fossil fuels for energy with larger amount associated with land use

• True

• False

TDS stands for Total Dissolved Solids, which refers to the concentration of dissolved substances in water and is commonly used to assess water quality.

• True

• False

Which compounds are summed to calculate the Total Dissolved Solids (TDS) in water?

• All ions and dissolved organic materials

• Only salts like NaCl and KNO₃

• All dissolved inorganic ions like Na⁺, Cl⁻, Ca²⁺, Mg²⁺, HCO₃⁻, SO₄²⁻, etc.

• Only bicarbonates (HCO₃⁻) and carbonates (CO₃²⁻)

CSTR stands for Continuous Stirred Tank Reactor, a reactor type where contents are mixed uniformly and is commonly used in chemical and biological processing.

• True

• False

VOC stands for Volcanic Organic Carbon, a naturally occurring compound measured in volcanic ash.

• True

• False

VSS stands for Volatile Suspended Solids, which are used to estimate the organic portion of suspended solids in wastewater.

• True

• False

In the Michaelis-Menten Equation:
    V = (Vm × S) / (Km + S)
What does Vm represent?

• The substrate concentration at half the reaction speed

• The maximum reaction velocity

• The molecular volume

• The minimum activation energy

Biological Oxygen Demand (BOD) is an indicator of:

• The level of biological nutrients in the soil

• • The need for biodiversity in oceans

• The amount of oxygen needed by microorganisms to decompose organic matter

• The chemical demand of oxygen

It is predicted that the likely range of temperature increases in the next century

will range from 2.4ºC to 5.4ºC.

• True

• False

The Plug Flow Reactor (PFR) assumes

• • Complete mixing at all times

• No mixing in the direction of flow, but perfect mixing in cross-sections

• Instantaneous reaction

• • Constant temperature without flow