Thermophilic (55-65 C) and Extreme Thermophilic (70-80 C) Sulfate Re
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- 作者：Marcus V. G. Vallero ; Eva Camarero ; Gatze Lettinga ; and Piet N. L. Lens
- 刊名：Biotechnology Progress
- 出版年：2004
- 出版时间：October 2004
- 年：2004
- 卷：20
- 期：5
- 页码：1382 - 1392
- 全文大小：216K
- 年卷期：v.20,no.5(October 2004)
- ISSN：1520-6033
文摘
The feasibility of thermophilic (55-65 
C) and extreme thermophilic (70-80 C) sulfate-reducing processes was investigated in three lab-scale upflow anaerobic sludge bed(UASB) reactors fed with either methanol or formate as the sole substrates andinoculated with mesophilic granular sludge previously not exposed to high temperatures. Full methanol and formate degradation at temperatures up to, respectively, 70and 75 C, were achieved when operating UASB reactors fed with sulfate rich (COD/SO42- = 0.5) synthetic wastewater. Methane-producing archaea (MPA) outcompetedsulfate-reducing bacteria (SRB) in the formate-fed UASB reactor at all temperaturestested (65-75 C). In contrast, SRB outcompeted MPA in methanol-fed UASB reactorsat temperatures equal to or exceeding 65 C, whereas strong competition betweenSRB and MPA was observed in these reactors at 55 C. A short-term (5 days)temperature increase from 55 to 65 C was an effective strategy to suppressmethanogenesis in methanol-fed sulfidogenic UASB reactors operated at 55 C.Methanol was found to be a suitable electron donor for sulfate-reducing processes ata maximal temperature of 70 C, with sulfide as the sole mineralization product ofmethanol degradation at that temperature.
C) and extreme thermophilic (70-80 C) sulfate-reducing processes was investigated in three lab-scale upflow anaerobic sludge bed(UASB) reactors fed with either methanol or formate as the sole substrates andinoculated with mesophilic granular sludge previously not exposed to high temperatures. Full methanol and formate degradation at temperatures up to, respectively, 70and 75 C, were achieved when operating UASB reactors fed with sulfate rich (COD/SO42- = 0.5) synthetic wastewater. Methane-producing archaea (MPA) outcompetedsulfate-reducing bacteria (SRB) in the formate-fed UASB reactor at all temperaturestested (65-75 C). In contrast, SRB outcompeted MPA in methanol-fed UASB reactorsat temperatures equal to or exceeding 65 C, whereas strong competition betweenSRB and MPA was observed in these reactors at 55 C. A short-term (5 days)temperature increase from 55 to 65 C was an effective strategy to suppressmethanogenesis in methanol-fed sulfidogenic UASB reactors operated at 55 C.Methanol was found to be a suitable electron donor for sulfate-reducing processes ata maximal temperature of 70 C, with sulfide as the sole mineralization product ofmethanol degradation at that temperature.