Respiration-based investigation of adsorbent-bioprocess compatibility

Table 1 Overview of adsorbents applied for product removal from fermentation broths, investigated in this work

Type	Nos.	Name	Company	Adsorption capacity (mg/g)			Colour	Symbol	Included in Figures
Type	Nos.	Name	Company	Lysine	Itaconic acid	5-Ketofructose	Colour	Symbol	Included in Figures
Activated carbon	1	Aqua CG 6/400	Aqua air adsorbents	247	420	201	Red	Circle	3, 4
	2	104113	Blücher	258	308	197	Green	Triangle up	3, 4
	3	Carbopal AP 4 N	Donau carbon	225	381	137	Cyan	Triangle left	3, 6, Additional file 1: S4
	4	CW 20	Silcarbon	249	361	169	Yellow	Cross (+)	3, 4, Additional file 1: S4, Additional file 1: S5
	5	Norit SX1G	Cabotcorp	88	310	94	Brown	Hexagon	6, Additional file 1: S4
	6	H90-PAH	Silcarbon	36	274	77	Olive	Pentagon	6, Additional file 1: S4
	7	100562	Blücher	228	496	264	Purple	Cross (X)	7, Additional file 1: S3, S4, S5
	8	Norit A Supra Eur	Cabotcorp	238	504	169	Dark yellow	Star (*)	Additional file 1: S3, S4, S5
Hyper-crosslinked polymer	1	HCP [44]	TU Darmstadt	55 ± 8	511 ± 2	21	Blue	Triangle down	3, 5, Additional file 1: S3
	2	PAD400	Purolite	n.a.	12 ∓ 1	n.a.	Orange	Diamond	5, Additional file 1: S3
	3	MN250	Purolite	n.a.	385 ± 3	15	Magenta	Star	5, Additional file 1: S3
	4	PAD428	Purolite	n.a.	96	n.a.	Royal blue	Bar (I)	Additional file 1: S3
Zeolite	1	NH4Y-12	Alfa Aesar	126	106	20	Violet	Triangle right	3, 4

Three types of adsorbents from various suppliers were tested: activated carbons, HCPs and a zeolite. The biological system, for which the adsorbent is mainly applied, is highlighted by bold font in columns 4–6. Colours and symbols of the respective adsorbents in the following figures are given in columns 7 and 8. Adsorption capacities were determined in solutions with initial concentrations of 30 g/L lysine, 60 g/L itaconic acid (for activated carbons, HCPs 1 and 3 and zeolite) or 30 g/L itaconic acid (for HCPs 2 and 4) and 50 g/L 5-ketofructose. Desorption of products from the adsorbents was investigated and in part published by our project partners [43]

ISSN: 2731-3654