Rendering pathogens harmless through the use of heat, antiseptics, antibacterial agents, etc.
D012722
Sewage
Refuse liquid or waste matter carried off by sewers.
Sludge,Sludge Flocs
D012767
Ships
Large vessels propelled by power or sail used for transportation on rivers, seas, oceans, or other navigable waters. Boats are smaller vessels propelled by oars, paddles, sail, or power; they may or may not have a deck.