"In France, since 2009, the growth in the number of craft breweries has not been denied (200 to 1000 breweries between 2009 and 2017 – Source Insee ). Their brewing processes represent a real challenge in the production and treatment of wastewater . Generated in large volumes, the discharge of this water contains a high content of organic matter and cannot have a neutral pH. This problem can overload the capacity of municipal wastewater treatment plants and lead to additional costs."
full article here: https://www.physitek.fr/laboratoires/industrie-brassicole-les-defis-du-controle-qualite-des-eaux-usees/
REMINDER: pollution of a watercourse is considered an offense under the Environmental Code (article L216-6) and is punishable by a fine of €75,000 and 2 years of imprisonment.