EFFECT OF THE THERMAL ALKALINE PRETREATMENT ON THE MESOPHILIC AND THERMOPHILIC ANAEROBIC DIGESTION OF WASTE ACTIVATED SLUDGE
Por:
Vigueras-Carmona S.E., Ramírez-Vives F., Noyola-Robles A., Monroy-Hermosillo O.
Publicada:
1 ago 2011
Categoría:
Chemical Engineering (miscellaneous)
Resumen:
This study is focused on the effect of thermo alkaline pretreatment on velocity of anaerobic hydrolysis mesophilic and thermophilic of waste activated sludge (WAS), separating the hydrolysis of suspended solids (SS) and dissolved solids (SD). In order to research the hydrolysis of SS, the Sander's surface model was used, and for the hydrolysis of SD, the God's model of saturation was employed. The pretreatment increased the superficial area available for the enzymatic action, due to the reduction of the solids size. The effect of the pretreatment in the anaerobic digestion of the SD in thermophilic conditions, resulted in competitive inhibition over the anaerobic hydrolysis rate, whereas that in mesophilic conditions, resulted in non competitive inhibition. Mathematical simulation of SS to SD and methane consecutive reactions, showed that a 4 % increase in initial thermal-alkaline treated sludge diminished the inhibition of SD hydrolysis in the thermophilic anaerobic digestion.
Filiaciones:
Vigueras-Carmona S.E.:
Universidad Autónoma Metropolitana, Departamento de Biotecnología, San Rafael Atlixco 186. Col, Vicentina 09340, Mexico
Tecnológico de Estudios Superiores de Ecatepec, División de Ingeniería Química y Bioquímica, Av. Tecnológico s/n Col, Valle de Anahuac, 55210. Ecatepec, Edo. de Mexico, Mexico
Ramírez-Vives F.:
Universidad Autónoma Metropolitana, Departamento de Biotecnología, San Rafael Atlixco 186. Col, Vicentina 09340, Mexico
Noyola-Robles A.:
Univ Nacl Autonoma Mexico, Inst Ingn, Coyoacan 04510, DF, Mexico
Monroy-Hermosillo O.:
Universidad Autónoma Metropolitana, Departamento de Biotecnología, San Rafael Atlixco 186. Col, Vicentina 09340, Mexico
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