Design and optimization of a semi‐industrial cavitation device for a pretreatment of an anaerobic digestion treatment of excess sludge and pig slurry
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https://doi.org/10.1002/wer.1366 |
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Títol
Design and optimization of a semi‐industrial cavitation device for a pretreatment of an anaerobic digestion treatment of excess sludge and pig slurryAutoria
Data de publicació
2020Editor
WileyISSN
1554-7531Tipus de document
info:eu-repo/semantics/articleVersió de l'editorial
https://onlinelibrary.wiley.com/doi/full/10.1002/wer.1366Versió
info:eu-repo/semantics/publishedVersionParaules clau / Matèries
Resum
The use of hydrodynamic cavitation (HC) as a wastewater treatment and anaerobic digestion pretreatment is a well‐known process. However, most of the experiments have been done at laboratory scale and using a low ... [+]
The use of hydrodynamic cavitation (HC) as a wastewater treatment and anaerobic digestion pretreatment is a well‐known process. However, most of the experiments have been done at laboratory scale and using a low concentration of total solids in the sludge treated. In this study, the waste‐activated sludge has been mixed with pig slurry with the aim of treating two wastes rich in nutrients and organic matter. The HC has been studied not only at laboratory scale but also at industrial scale (up to 500 L), using a novel rotating device consisting of a rotor with multiple teeth that rotate inside a grooved stator. The effectiveness of the process has been calculated using the disintegration degree (DD) and analyzing the volatile fatty acids, while the energy efficiency has been determined with specific energy of the sludge solubilization (SESCOD) and the specific energy. Results show that both the SESCOD and the specific energy decrease when the cavitation process is scaled from laboratory scale to industrial scale. Specifically, SESCOD decreases from 2.71 × 102 to 0.16 × 102 kJ/g SCOD and specific energy decreases from 3.58 × 104 to 2.85 × 103 kJ/kg TS while DD values show reasonable values up to 17%. [-]
Publicat a
Water Environment Research, 2020Entitat finançadora
Comisión Europea
Codi del projecte o subvenció
GA LIFE14/ENV/ES/000150
Drets d'accés
© 2020 Water Environment Federation
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info:eu-repo/semantics/restrictedAccess
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