Upgrading syngas fermentation effluent using Clostridium kluyveri in a continuous fermentation

Table 1 Theoretical composition of the substrate (ethanol and acetic acid) during the operating period for the bioreactor with pertraction (BP) and without pertraction (BNP)

Day (Phase)	OLR BP (g COD L⁻¹ day⁻¹; mM-C day⁻¹)	OLR BNP (g COD L⁻¹ day⁻¹; mM-C day⁻¹)	HRT (d)	Ethanol/acetic acid ratio
1–18 (I)	12 (257)	12 (257)	2	10
18–28 (II)	6 (129)	6 (129)	4	10
28–37 (III)	6 (129)	10 (215)	2	10
37–48 (IV)	10 (215)	10 (215)	2	10
48–74 (V)	15 (322)	15 (322)	2	10
74–85 (VI)	15 (340)	15 (340)	2.3	3
86–95 (VII)^a	15 (340)	15 (340)	2.3	3

Ethanol and acetic acid have a COD content of 96 and 64 g COD mol⁻¹, respectively
HRT hydraulic residence time, COD chemical oxygen demand, OLR organic loading rate
^aReal syngas fermentation effluent was used

ISSN: 2731-3654