Slow pyrolysis enhances the recovery and reuse of phosphorus and reduces metal leaching from biosolids.
Waste Manag
; 64: 133-139, 2017 Jun.
Article
en En
| MEDLINE
| ID: mdl-28318964
ABSTRACT
In this study, biochar is produced from biosolids with and without alum at a range of temperatures and simulated oxidative aging of the biochars is conducted to quantify the long-term leaching of P and metals. While biosolids containing alum had negligible amounts of plant-available P, after pyrolysis >90% of the P became immediately available for plant growth. When biosolids with no alum were converted into biochar there was a small increase in the availability of P but a larger pool was available after oxidation. Both of the biosolids leached significant amounts of metals after oxidation. In contrast, the biochars had a very low available metal content and this did not increase with oxidation, demonstrating a stable metal content. Pyrolysis is an effective waste management strategy for biosolids that can simultaneously reduce the leaching of metals and increase the efficiency of recycling of P for beneficial re-use.
Palabras clave
Texto completo:
1
Colección:
01-internacional
Base de datos:
MEDLINE
Asunto principal:
Fósforo
/
Administración de Residuos
/
Metales
Idioma:
En
Revista:
Waste Manag
Asunto de la revista:
SAUDE AMBIENTAL
/
TOXICOLOGIA
Año:
2017
Tipo del documento:
Article