Table 4. Performance of the purification process of AA involving treatment of DM-DPM medium with the MB20 resin in batch (scenario 2) and a step-elution with H₂SO₄.

Parameter	DPM	DM-DPM	DM-DPM MB20 (2–7)c	DM-DPM MB20 (2–6)d
Yield (%) stepa	100	91.0	90.3	75.3
Yield (%) aggr.b	100	91.0	82.2	68.5
Purity (%)	2.4	59.8	96.9	99.2
Purity increase	1.0	24.6	40.4	41.3
Enrichment factor	1.0	58	1256	5086

^aYield in a step with respect to the previous one.

^bAggregate yield in a step with respect to the starting DPM medium.

^cMB20 (2–7), pooled fractions from elution steps 2 to 7.

^dMB20 (2–6), pooled fractions from elution steps 2 to 6.