Pour-plate method and microscopy.
Membrane filtration is a simple way of concentrating any microorganisms present in a non-turbid, liquid water sample.
Quantitative enrichment of large, filterable volumes on wort agar plates.
Membrane filters with pore sizes of 0.65 µm retain yeasts from the liquid sample, which are then incubated aerobically on agar nutrient media. The filtrate is collected in a receiver vessel and then discarded. After incubation, the yeast is analysed under a microscope.
Determining the standard of hygiene through rinse water checks
Macroscopic counting of the colonies formed, microscopy for bacteria, yeasts, moulds
Check for microbiological vulnerabilities by detecting bacteria (moderately acid-tolerant bacteria) and yeasts in process water.
Pour-plate method and membrane filtration