Effect of the variation of the level of lactose conversion in an immobilized lactase reactor upon operating costs for the production of Baker's yeast from hydrolyzed permeate obtained from the ultrafiltration of cottage cheese whey

Conference · Thu Jan 01 00:00:00 EST 1987

OSTI ID:7092452

Scott, T C; Hill, Jr, C G; Amundson, C H

Operating costs for the production of Baker's yeast from hydrolyzed permeate from the ultrafiltration of cottage cheese whey were calculated as a function of the level of lactose conversion in the immobilized lactase reactor. These costs were calculated for the case of 90% conversion of lactose in the reactor and compared to those which result when running the reactor at lower conversions with recycle of unreacted lactose. Total operating costs were estimated by combining individual operating costs for the immobilized enzyme reactor, costs associated with processing a lactose recycle stream, and energy costs associated with cooling the reactor feed stream and sterilizing the hydrolysate stream. It was determined that operating costs are minimized at about 9.9 cents per pound of lactose when the reactor is run at approximately 72% conversion. This represents a savings of 2.4 cents per pound of lactose over the case of a once-through 90% conversion of lactose in the reactor. 8 refs., 4 figs., 9 tabs.

• Research Organization: Oak Ridge National Lab., TN (USA); Wisconsin Univ., Madison (USA)
• DOE Contract Number: AC05-84OR21400
• OSTI ID: 7092452
• Report Number(s): CONF-870523-1; ON: DE87005716
• Resource Relation: Conference: 9. symposium on biotechnology for fuels and chemicals, Boulder, CO, USA, 5 May 1987
• Country of Publication: United States
• Language: English

Related Subjects

09 BIOMASS FUELS
59 BASIC BIOLOGICAL SCIENCES
BIOREACTORS
OPERATING COST
SACCHAROMYCES CEREVISIAE
PRODUCTION
FOOD INDUSTRY
IMMOBILIZED ENZYMES
LACTOSE
O-GLYCOSYL HYDROLASES
PROCESS DEVELOPMENT UNITS
ULTRAFILTRATION
WASTE PRODUCT UTILIZATION
WHEY
CARBOHYDRATES
COST
DISACCHARIDES
ENZYMES
FILTRATION
FUNCTIONAL MODELS
FUNGI
GLYCOSYL HYDROLASES
HYDROLASES
INDUSTRIAL WASTES
INDUSTRY
MICROORGANISMS
OLIGOSACCHARIDES
ORGANIC COMPOUNDS
PLANTS
SACCHARIDES
SACCHAROMYCES
SEPARATION PROCESSES
WASTES
YEASTS
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