Lab 1c

What inoculum to substrate ratio did we use?

• 2:1 by VS

• 2:1 by volume

• 1:2 by VS

• 1:2 by volume

How do we measure VS?

Which gas contributes to the smell of your bottles?

• Oxygen

• Methane

• Carbon Dioxide

• Hydrogen Sulfide

How did we adjust alkalinity?

• By adding hydrochloric acid

• By adding sodium hydroxide

• By shaking the bottles

• By adding baking soda

Why do we care about nitrogen and phosphorus?

• Releasing nitrogen and phosphorus into the environment can be dangerous to plants and animals

• There are legal limits of how much you are allowed to release at the end of treatment

• We can recover it from waste streams to be used as fertilizer

• Certain forms of nitrogen and phosphorus are toxic to humans

What is the difference between total phosphorus and reactive phosphorus?

What do we expect most of our total nitrogen to be in the form of?

• Nitrogen gas (N2)

• Nitrate (NO3-)

• Nitrite (NO2-)

• Ammonia (NH4+)