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Plasma Medicine
SJR: 0.278 SNIP: 0.183 CiteScore™: 0.57

ISSN Imprimir: 1947-5764
ISSN En Línea: 1947-5772

Plasma Medicine

DOI: 10.1615/PlasmaMed.2016018656
pages 219-234

Nonequilibrium Plasma Decontamination of Corn Steep Liquor for Ethanol Production: SO2 Removal and Disinfection

Ngoc Anh Huynh
Nyheim Plasma Institute, Camden, NJ, USA; Department of Chemical and Biological Engineering, Drexel University, Philadelphia, Pennsylvania 19104
Thomas Li
Nyheim Plasma Institute, Drexel University, Camden, New Jersey 08103
Mykola Kovalenko
C&J Nyheim Plasma Institute, Drexel University, Camden, New Jersey 08103
Ryan D. Robinson
Nyheim Plasma Institute, Drexel University, Camden, New Jersey 08103
Alexander A. Fridman
C&J Nyheim Plasma Institute, Drexel University, Camden, New Jersey 08103
Alexander Rabinovich
Nyheim Plasma Institute, Drexel University, Camden, New Jersey 08103
Gregory Fridman
C&J Nyheim Plasma Institute, Drexel University, Camden, New Jersey 08103

SINOPSIS

The objective of this study is to investigate the effect of four plasma systems on corn steep liquor using (1) direct current spark discharge in liquid, (2) pulsed dielectric barrier discharge (DBD) with ultrafine misting, (3) reverse vortex gliding arc (RVGA), and (4) forward vortex gliding arc (FVGA) with droplet atomizer. The results show a notable reduction in bacteria using FVGA and RVGA, with a lower degree of reduction using spark discharge and DBD. DBD appears to accumulate the effect on SO2 but only up to a certain threshold. DBD treatment reduces SO2 level by 30% after 600 s. On the other hand, for spark discharge, the effect did not accumulate, although the treatment had the lowest reduction in SO2 levels among the tested methods. RGVA gives the best results with regard to SO2 levels. We found 60% SO2 was left in water treated by FVGA, and 20% SO2 was left in water treated by RVGA.


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