Piggery wastewater treatment with algae-bacteria consortia: Pilot-scale validation and techno-economic evaluation at farm level.
Bioresour Technol
; 351: 127051, 2022 May.
Article
em En
| MEDLINE
| ID: mdl-35341919
ABSTRACT
The efficiency of an outdoor pilot-scale raceway pond treating the wastewaters generated by a large-scale piggery farm in Northern Italy was evaluated. The biomass productivity over 208 days of experimentation was 10.7 ± 6.5 g TSS·m-2·d-1, and ammoniacal nitrogen, orthophosphate, and COD average removal efficiencies were 90%, 90%, and 59%, respectively. Results were used to perform a comprehensive techno-economic analysis for integrating algae-based processes in farms of different sizes (100-10000 pigs). The amount of N disposed of on agricultural land could be reduced from 91% to 21%, increasing the fraction returned to the atmosphere from 2.4% to 63%, and the fraction in the biomass from 6.2% to 16%. For intensive farming, the release of 110 t N·ha-1·y-1 contained in the digestate could be avoided by including algae-bacteria processes. The biomass production cost was as low as 1.9 ·kg-1, while the cost for nitrogen removal was 4.3 ·kg N-1.
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Base de dados:
MEDLINE
Assunto principal:
Purificação da Água
/
Microalgas
Idioma:
En
Ano de publicação:
2022
Tipo de documento:
Article