{"id":13128,"key":"Microorganisms_in_secondary_wastewater_treatment","title":"Microorganisms in secondary wastewater treatment","latest":{"id":1249240,"timestamp":"2026-05-28T17:40:20Z"},"content_model":"wikitext","license":{"url":"https://www.appropedia.org/Appropedia:Copyrights","title":"CC-BY-SA-4.0"},"source":"'''Microorganisms used in a secondary treatment''' system include: bacteria, fungi, algae, and protozoa.\n\nThese play an essential role in natural systems, and are harnessed in technologies such as activated sludge and fixed biofilm technologies such as roughing filters and [[slow sand filters]].\n\n{{Page data\n| license = CC-BY-SA-3.0\n}}\n\n[[Category:Wastewater treatment]]"}