A "bacteria bed" (also known as a trickling filter) is used to expose sewage effluent to air and microorganisms to purify the water . Which perspective are you most interested in?
In environmental science and aquarium maintenance, a "bacteria bed" is a layer of material (like gravel, sand, or bio-balls) designed to host beneficial microorganisms that break down waste . bacteria bed
Experts at AARP suggest that leaving your bed unmade during the day can actually be healthier. This allows moisture to evaporate, dehydrating and killing dust mites and reducing bacterial growth . Prevention Tips: A "bacteria bed" (also known as a trickling
at 60°C or higher to effectively kill bacteria . bacteria bed