Britain's first Bio Bus to start regular service in Bristol

The video explains the treatment of sewage and food waste using anaerobic digestion. It details how 75 million cubic meters of sewage and 35,000 tons of food waste are processed annually. The anaerobic digestion process involves cooking the waste at 35 degrees for 12 days, allowing bacteria to produce biogas. A new technology refines this biogas to a quality similar to natural gas used in homes.

How much sewage is treated annually according to the video?

• 75 million cubic meters

• 1 million cubic meters

• 100 million cubic meters

• 35,000 tons

What is the process called that treats food waste to produce biogas?

• Fermentation

• Composting

• Anaerobic digestion

• Aerobic digestion

At what temperature is the slurry cooked during anaerobic digestion?

• 55 degrees

• 45 degrees

• 35 degrees

• 25 degrees

How long is the slurry held during the anaerobic digestion process?

• 12 days

• 8 days

• 15 days

• 5 days

What is the quality of the refined biogas compared to?

• Petroleum gas

• Raw biogas

• Natural gas used in homes

• Industrial gas