27. October 2021
Henriette zu Doha
Biochar | biosolids | climate change | GWP | net-zero | Sewage Sludge

Biochar from bioso­lids: the climate-posi­tive alter­na­tive to conven­tional phos­phorus fertilizer

PYREG Biochar from bioso­lids proves a nega­tive global warming poten­tial by a factor of 10 compared to conven­tional fertilizer.

In a 2019 study by the German Federal Envi­ron­mental Agency, the result is that conven­tional ferti­lizer produc­tion in Germany emits about +1.2 kg CO2 eq/kg P2O5. Further­more, phos­phate reco­very processes like preci­pi­ta­tion (in digested sludge or centrate) or sewage sludge ash also demons­trably cause CO2 emissions.

In compa­rison to the global warming poten­tial (GWP) of these processes, PYREG biochar from bioso­lids has a nega­tive GWP of 4,01 kg CO2 eq / kg P2O5. Conse­quently, the reco­very of phos­phate within the PYREG process and the final appli­ca­tion of the biochar contri­butes to fight global warming and reaching net zero.

In addi­tion to that the phos­phate reco­very rate of PYREG biochar from bioso­lids is nearly 80 %, which is in the range of other thermal treat­ments and far better than preci­pi­ta­tion processes with <40 % reco­very rate.

UBA TEXTE 13/2019: Ökobi­lan­zi­eller Vergleich der P-Rück­ge­win­nung aus dem Abwas­ser­strom mit der Dünge­mit­tel­pro­duk­tion aus Rohphos­phaten unter Einbe­zie­hung von Umwelt­fol­ge­schäden und deren Vermei­dung, Forschungs­kenn­zahl 3716 31 330 0 UBA-FB 002759, ISSN 1862-480
Kratz, Schnug (2009): Zur Frage der Löslich­keit und Pflan­zen­ver­füg­bar­keit von Phos­phor in Dünge­mit­teln JOURNAL FÜR KULTUR­PFLANZEN, 61 (1). S. 2–8, 2009, ISSN 0027-7479 VERLAG EUGEN ULMER KG, STUTTGART
Koch, Bern­hard (2021): Gefäß­ver­such zur Phos­phor­ver­füg­bar­keit aus Klär­schlamm­re­cy­claten, Landes­be­trieb Land­wirt­schaft Hessen, DPP Forum 2021 Frankfurt
EVS 2019: Expe­ri­men­teller Nach­weis der Cadmi­um­ent­frach­tung während des Karbo­ni­sie­rungs­pro­zesses von Klärschlamm
Kuzyakov 2015: Biochar stabi­lity in soil: Meta-analysis of decom­po­si­tion and priming effects, GCB Bioen­ergy, DOI:10.1111/gcbb.12266
EBI White­pa­paper


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PYREG is present at various trade fairs and congresses. We look forward to welcoming you at our booths there or to meeting you during the events. To reserve an appointment, please contact us at sales@pyreg.com.   Bio360Expo: February 8-9, 2023...

Raising Climate Ambi­tions with Biochar – a sympo­sium by IBI

Raising Climate Ambi­tions with Biochar – a sympo­sium by IBI

This 6 – 8 December 2022, join PYREG for International Biochar Initiative's annual symposium, “Raising Climate Ambitions with Biochar.” The three-day, virtual event will focus on quantifying biochar’s true climate solution impacts, as well as...