n.layer of sand or gravel used to expose sewage effluent to air and the action of microorganisms

Acetate production from whey lactose using co‐immobilized cells of homolactic and homoacetic bacteria in a fibrous‐bed bioreactor
Seasonal changes of benthic bacteria in a seagrass bed ( Posidonia oceanica ) of the Ligurian Sea in relation to origin, composition...
Effect of streambed bacteria release on E. coli concentrations: monitoring and modeling with the modified SWAT.
Method for producing a string-shaped bacteria bed for sewage or wastewater treatment
Comparison of ferric iron generation by different species of acidophilic bacteria immobilized in packed-bed reactors
Copper continuously limits the concentration of bacteria resident on bed rails within the intensive care unit.
Spatial distribution and respiration of bacteria in stream-bed sediments
Photocatalytic inactivation of bacteria in a fixed-bed reactor: Mechanistic insights by epifluorescence microscopy
The efficacy of sand-immobilized organoclays as filtration bed materials for bacteria
Chromate (CrO 2? 4 ) Reduction in Groundwaters by Using Reductive Bacteria in Fixed-Bed Bioreactors