To enhance the efficiency of anaerobic digestion, we examined the effects of ultrasonic pretreatment on the solubilization of waste activated sludge (WAS) and on methane generation. Organic substances in WAS were solubilized by ultrasonic pretreatment. In the digestion with WAS pretreated by ultrasonic pretreatment for 30 min, the total quantity of generated methane increased by 64%, as compared with experimental control (non-treatment). In addition, the relationships between methane generation and concentrations of soluble protein, carbohydrate and volatile fatty acid (VFA) were also examined. (C) 1998 Elsevier Science Ltd. All rights reserved.
机构:
Univ Autonoma Metropolitana, Dept Biotecnol, Iztapalapa 09340, DF, Mexico
Tecnol Estudios Super Ecatepec, Div Ingn Quim & Bioquim, Ecatepec 55210, Edo De Mexico, MexicoUniv Autonoma Metropolitana, Dept Biotecnol, Iztapalapa 09340, DF, Mexico
Vigueras-Carmona, S. E.
Ramirez-Vives, F.
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Univ Autonoma Metropolitana, Dept Biotecnol, Iztapalapa 09340, DF, MexicoUniv Autonoma Metropolitana, Dept Biotecnol, Iztapalapa 09340, DF, Mexico
Ramirez-Vives, F.
Noyola-Robles, A.
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Univ Nacl Autonoma Mexico, Inst Ingn, Coyoacan 04510, DF, MexicoUniv Autonoma Metropolitana, Dept Biotecnol, Iztapalapa 09340, DF, Mexico
Noyola-Robles, A.
Monroy-Hermosillo, O.
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Univ Autonoma Metropolitana, Dept Biotecnol, Iztapalapa 09340, DF, MexicoUniv Autonoma Metropolitana, Dept Biotecnol, Iztapalapa 09340, DF, Mexico
Monroy-Hermosillo, O.
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