Semi-continuous laboratory fermenter

Figure 9. Production of T. viride cellulose in a semi-continuous laboratory fermenter...

A comparison of data from a laboratory evaluation by O Rourke (5) of methane fermentation at 35 °C and using sludge from a primary municipal waste treatment plant is illustrated in Figure 6. The digesters were operated on a semi-continuous basis, receiving waste at least once per day and more frequently than this at the lower 6c of 2.5 days. The results are quite comparable with those obtained from the continuous feed... 

While we have not investigated fermentation technology in detail, we have used a laboratory fermenter to produce large quantities of T. viride cellulase in a semi-continuous system. The effluent from the fermenter has been used by Ghose in his digestion experiments (7) with no treatment other than filtration through glass wool and pH adjustment. 

Standard fed-batch operation is not economically viable due to solvent toxicity, so the system can be coupled with an in situ recovery process (Lee et al. 2008 Ezeji et al. 2004a, b). Fed-batch fermentation is used principally in laboratories, but it cannot be applied without in situ product removal due to its strong cell inhibition. Semi-continuous operation is also used in industrial practice in order to avoid strain degeneracy (Branduardi et al. 2014 Xue et al. 2013a). 

Source separated municipal biowaste Laboratory scale, semi-continuous reactor, V = 4,5 dm wet fermentation, thermophilic conditions (55°Q, leachate recirculation HRT 14-18 0.63-0.71 m B kg VS- Hartmann Ahrig, (2005)... 

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