Initial-rate based method for estimating the maximum heterotrophic growth rate parameter (渭<sub>Hmaxsub>)
- 作者：C. Fall<sup>asup><sup> ; sup><sup>c-fa-ll@hotmail.comsup> ; C.M. Hooijmans<sup>bsup> ; M. Esparza-Soto<sup>asup><sup> ; sup><sup>1sup> ; M.T. Olguin<sup>csup> ; K.M. Bâ ; <sup>asup><sup> ; sup><sup>1sup>
- 关键词：Activated sludge model ; ASM1 ; Heterotrophic growth rate ; Respirometry ; Seed varying method
- 刊名：Bioresource Technology
- 出版年：2012
- 期刊代码：11_09608524
- 类别：ce
- 出版时间：July, 2012
- 卷：116
- 期：Complete
- 页码：126-132
- 文件大小：326 K
摘要
Currently, the method most used for measuring the maximum specific growth rate (m>渭 m><sub>Hmaxsub>) of heterotrophic biomass is by respirometry, using growth batch tests performed at high food/microorganism ratio. No other technique has been suggested, although the former approach was criticized for providing kinetic constants that could be unrepresentative of the original biomass. An alternative method (seed-increments) is proposed, which relies on measuring the initial rates of respiration (m>r<sub>O2sub> m><sub>_inisub>) at different seeding levels, in a single batch, and in the presence of excess readily biodegradable substrate (S<sub>Ssub>). The ASM1-based underlying equations were developed, which showed that m>渭 m><sub>Hmaxsub> could be estimated through the slope of the linear function of m>r<sub>O2sub> m><sub>_inisub>路(m>V m><sub>WWsub> + m>v m><sub>MLsub>) vs m>v m><sub>MLsub> (volume of mixed liquor inoculum); m>V m><sub>WWsub> represent the wastewater volume added. The procedure was tested, being easy to apply; the postulated linearity was constantly observed and the method is claimed to measure the characteristics of the biomass of interest.