Week 3 Biogas applied to agriculture

Question 1

Denmarks goal of slurry digestion by 2020

Answer 1

50%, has met this.

Question 2

Explain the Denmark piping system for the slurries

Answer 2

Reduces the need for 50-70 deliveries per day by truck. Double pipe system. Slurry to the plant and a bio digestate fertiliser back.

Question 3

Problems in the summer with AD

Answer 3

gas expands in the heat pressure relief valve goes off and biogas gone. Collect this so that there are no biogas loses, Monitor the slippage. In Germany it has to be <1%

Question 4

Linkoping biogas facility

Answer 4

AD, use slaughter waste as feedstock to Ad. They pasteurise 70’C for an hour to kill pathogens.
Compress their biogas to 250 bar and it is used for lorries, buses. Taxis got biomethane and skipped the queue and free parking. They have a train too. 80 buses capacity. Storage on top of the bus, 400km fuel 1200L. Is an example of circular economy.