Ulrich Bretscher's pocket watches, sewage treatment, black powder

(Klicks: 148;Website hinzugefügt: Apr 4, 2014)

• LINK: musketeer.ch
• Land: Schweiz
• Stichwort 1: phosphorus elimination
• Stichwort 2: sewage treatment
• Stichwort 4: thermophilic digester
• Stichwort 5: digester
• Stichwort 6: pumping costs
• Stichwort 7: saltpeter
• Stichwort 8: charcoal
• Stichwort 9: sulfur
• Stichwort 10: homemade black powder

Beschreibung:

Ulrich Bretscher's pocket watches, sewage treatment, black powder