Cloudy Hefeweizen beers cannot be membrane-filtered. Nevertheless, to microbiologically analyse as large a sample volume as possible, it is advisable to enrich the entire contents with nutrient concentrate to promote the growth of contaminants in the beer environment.
Cloudy Hefeweizen beer samples from the fermentation tank to the filled bottle.
Preliminary microscopic analysis for obligate beer-spoilage organisms and wild yeasts with subsequent enrichment.