Batch and fed-batch cultures for the treatment of whey with mixed yeast cultures

被引：42

作者：

Cristiani-Urbina, E ^{[1
]}

Netzahuatl-Muñoz, AR ^{[1
]}

Manriquez-Rojas, FJ ^{[1
]}

Juárez-Ramírez, C ^{[1
]}

Ruiz-Ordaz, N ^{[1
]}

Galíndez-Mayer, J ^{[1
]}

机构：

[1] Inst Politecn Nacl, Escuela Nacl Ciencias Biol, Dept Ingn Bioquim, Prolongac Carpio & Plan Ayala, Mexico City 11340, DF, Mexico

来源：

PROCESS BIOCHEMISTRY | 2000年 / 35卷 / 07期

关键词：

whey; yeast; mixed culture; COD; airlift bioreactor; dairy waste treatment;

D O I：

10.1016/S0032-9592(99)00116-8

中图分类号：

Q5 [生物化学]; Q7 [分子生物学];

学科分类号：

071010 ; 081704 ;

摘要：

'Lactic yeasts' produce some extracellular metabolites, as well as biomass, when cultivated in whey. Mixed cultures are able to use several sources of carbon simultaneously and therefore the use of mixed yeast cultures is proposed in order to reduce the whey COD and increase the biomass yield. Of the mixed yeast cultures tested, the highest biomass yield was obtained with Torulopsis cremoris and Candida utilis. C. utilis consumed some metabolic by products generated by T. cremoris. Repeated fed-batch culture of T. cremoris and C. utilis, carried out in an airlift bioreactor designed to operate variable Volume processes, is a potential alternative for the treatment of whey, since it produces a high yield of biomass (0.75 g of biomass/g of lactose) and a greater COD removal efficiency (95.8%) than those reported in the literature. (C) 2000 Elsevier Science Ltd. All rights reserved.

引用

页码：649 / 657

页数：9

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