See past events

This calendar of events related to sustainable nutrient use and recycling is maintained in co-operation between the European Sustainable Phosphorus Platform (ESPP) and the Sustainable Phosphorus Alliance (SPA) in North America.

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Webinar - recycled nutrients in Organic Agriculture (FiBL, RELACS): Organic contaminants and other risks

11 March 2021, 10h -12h  Paris time (CET)
To register, contact: 

Webinar - recycled nutrients in Organic Agriculture (FiBL, RELACS): How to recycle nutrients from household wastes and the food industry

17 March 2021, 14h – 16h Paris time (CET)
To register, contact: 

ESPP webinar on regulatory questions for nutrient recycling from waste-derived algae

22 March 2021, 09h00 -13h00 (Paris time, CET) - Website 

Registration: coming soon


  • Identify regulatory obstacles to nutrient recycling/reuse from waste-derived algae / micro-algae, i.e. which either have had ‘waste’ status or which are grown using waste inputs
  • Outline potential valorisation routes, current status of development and market potential, important risk questions (contaminants, safety)
  • Propose possible approaches to address key regulatory questions identified


  • algae grown using waste as a substrate, e.g. grown in municipal or industrial wastewater, in manure or food waste liquors, in digestates derived from such wastes, or fed by offgases (CO2 and/or NOx emissions mitigation),
  • valorisation of the algae themselves (e.g. after ‘mechanical’ processing or dying), or of materials or chemicals derived or extracted from the algae,
  • materials left over from processing algae grown for another purpose, e.g. for extraction of pharmaceuticals, biofuels, cosmetics …
  • algae collected from cleaning operations, such as beach cleaning, canal dredging, clarification of eutrophied waters ….

Uses for the algae and derived materials can include:

  • animal feeds
  • fertilising products: nutrient fertilisers, organic soil improvers, crop biostimulants (e.g. humics)
  • industrial products: packaging (fibres), chemicals …
  • applications with specific regulations: cosmetics, pharmaceuticals, human food additives
  • energy use: extraction of biofuels, combustion of biomass
  • combinations of these, e.g. extraction of a substance for a specific use (cosmetics, biofuels) leaving remaining biomass which can be used for a lower grade application, such as animal feed or fertiliser

Proposals for short contributions are welcome, especially real case studies of regulatory questions confronting algae production process or algae-derived products. Contact:

Phosphates 2021 (CRU)

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23 - 25 March 2021, Online - Website

Webinar - recycled nutrients in Organic Agriculture (FiBL, RELACS): How to recycle nutrients from human excreta

12 April 2021, 14h – 16h Paris summer time (CEST)
To register, contact: 

EIP-AGRI seminar: Healthy soils for Europe: sustainable management through knowledge and practice 

13 - 14 April 2021Website

Webinar - recycled nutrients in Organic Agriculture (FiBL, RELACS): Socioeconomic aspects and final discussion

22 April 2021, 10h – 12h Paris summer time (CEST)
To register, contact: 

AquaEnviro “The Art of the Possible: Resource Recovery from Wastewater and Bioresources”

13 May 2021 (online) - Website

Managing a Legacy of Phosphorus (Sustainable Phosphorus Alliance webinar)

20 May 2021, 9h00 Arizona (18h00 Brussels CEST) - Website 

4th European Sustainable Phosphorus Conference (2021)

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31 May - 2 June 2021, Vienna, Austria - Website

Sustainable Foods Summit Europe

9 - 11 June 2021, Amsterdam, the Netherlands - Website

5th International Conference on Ecotechnologies for Wastewater Treatment (EcoSTP2020)

21 - 25 June 2021, Milan, Italy - Website 
“Impacting the environment with innovation in wastewater treatment“

“How to close nutrient cycles for future Zero Hunger” session at Eurosoil 2020

23 - 27 August 2021, Geneva, Switzerland - Website

4th IWA Resource Recovery Conference

5 - 8 September 2021, Istanbul, Turkey - Website   

20th Organic World Congress

6 - 10 September 2021, Rennes, France - Website

RAMIRAN (Recycling of Agricultural, Municipal and Industrial Residues in Agriculture Network) 

Postponed to 20 - 23 September 2021, Cambridge, United Kingdom - Website 
Managing Organic Resources in a Changing Environment
Please note the changed dates

Phos4You Final Conference: P-recovery from wastewater

22 - 23 September 2021, Essen, Germany & online - Website

Aquenviro European Waste Water Management Conference

28 - 29 Sept 2021 (Online) - Website 

Aquaenviro European Biosolids & Bioresources

16 - 17 November 2021 (Online) - Website  


24 - 25 November 2021, Hertogenbosch, Netherlands - Website 

IWA Water & Resource Recovery

10 - 13 April 2022, Poznan, Poland - Website 

IWA Sustainable Sludge Management

18 - 22 October 2022, Beijing, China - Website