Differences

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--- algae:waste_wastewater_nutrient_recovery [2026-06-27 07:31] – [Urban Wastewater Treatment Directive] robert
+++ algae:waste_wastewater_nutrient_recovery [2026-06-27 07:41] (current) – [Nitrates Directive] robert
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 Council Directive 91/271/EEC concerning urban wastewater treatment (as amended) [[https://eur-lex.europa.eu/legal-content/EN/TXT/?uri=CELEX%3A01991L0271-20140101|EURlex]], with the recently adopted recast: Directive (EU) 2024/3019 of the European Parliament and of the Council of 27 November 2024 on urban wastewater treatment, OJ L, 12.12.2024 [[https://eur-lex.europa.eu/legal-content/EN/TXT/?uri=CELEX%3A02024L3019-20241212|EURlex]].
-__Relevance to algae:__ This Directive regulates the collection, treatment and discharge of urban wastewater. Algae are used in advanced tertiary wastewater treatment systems for nutrient removal (nitrogen and phosphorus). Where algae are used in this role, the operational framework of the treatment system is governed by the UWWTD, and the status of the harvested biomass will depend on the treatment plant's operating permit and the national implementation of waste law. The 2024 recast introduces requirements for energy-neutral treatment plants and expanded nutrient removal — creating new commercial opportunities for algae-based nutrient removal systems integrated into wastewater infrastructure.
+__Relevance to algae:__ This Directive regulates the collection, treatment and discharge of urban wastewater. Algae are used in advanced secondary or tertiary wastewater treatment systems for nutrient removal (nitrogen and phosphorus). Where algae are used in this role, the operational framework of the treatment system is governed by the UWWTD, and the status of the harvested biomass will depend on the treatment plant's operating permit and the national implementation of waste law. The 2024 recast introduces requirements for energy-neutral treatment plants and expanded nutrient removal — creating new commercial opportunities for algae-based nutrient removal systems integrated into wastewater infrastructure.
 === Sewage Sludge Directive ===
-Council Directive 86/278/EEC of 12 June 1986 on the protection of the environment, and in particular of the soil, when sewage sludge is used in agriculture, OJ L 181, 4.7.1986, p. 6.
+Council Directive 86/278/EEC of 12 June 1986 on the protection of the environment, and in particular of the soil, when sewage sludge is used in agriculture, OJ L 181, 4.7.1986, p. 6 !FIXME!.
 __Relevance to algae:__ This Directive (currently under revision) regulates the agricultural use of sewage sludge — the solid or semi-solid residue from wastewater treatment. Where algal biomass is produced in a wastewater treatment context and the resulting biomass is classified as or mixed with sewage sludge, it would fall under this Directive's restrictions. In particular, the Directive limits the metals content of sludge applied to agricultural soils. The ongoing revision of this Directive is expected to introduce updated and stricter contaminant limits.
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 === Nitrates Directive ===
-Council Directive 91/676/EEC of 12 December 1991 concerning the protection of waters against pollution caused by nitrates from agricultural sources, OJ L 375, 31.12.1991, p. 1.
+Council Directive 91/676/EEC of 12 December 1991 concerning the protection of waters against pollution caused by nitrates from agricultural sources, OJ L 375, 31.12.1991, p. 1 !FIXME!.
 __Relevance to algae:__ The Nitrates Directive restricts the application of nitrogen from agricultural and organic sources to land in designated "nitrate vulnerable zones". Algal biomass, digestate from algae-fed anaerobic digestion, and algae-based fertilising products are all potential sources of agricultural nitrogen; their use is subject to the Nitrates Directive's application restrictions where they contain nitrogen forms that could leach. This is particularly relevant for algae grown on and retaining nutrients from agricultural wastewater or nutrient-rich effluent.