Hippy SteveTIL - Sewer sludge (euphemistically called #biosolids by many cities) can be turned into #biochar via #pyrolysis.
If the pyrolysis happens at >600C for >10 minutes, the resulting biochar will be free of #microplastics, #PFAs, pathogens, and pharmaceuticals - all of which could continue to be a problem when you just #compost sewer sludge.
And... the #phosphorous is retained in the biochar, meaning it'll be a fertilizer in addition to the other biochar benefits.
Biochar from sewage sludge: the phosphorus fertilizer for a safe and sustainable agriculture - PYREG GmbH
facebook LinkedIn Twitter The Danish EPA gives green light for application of biochar from sewage sludge for use in farming: Biochar from sewage sludge can now be used as a fertilizer. If the pyrolysis takes place at temperatures > 500˚C for more than 3 minutes, and the process temperature and duration is documented, the Danish […]