Potential for anaerobic treatment of whey
Results of experiments on 3 laboratory-scale reactors loaded with whey at different daily rates showed that a daily loading of 85 lb COD/1000 cubic feet achieved a COD reduction efficiency of 86% with a gas yield (50% methane) of 5 cubic feet/gal of treated whey. High microorganism population and pH control were essential for stable operation. Overall 1st order COD removal rate constants were 1.13, 0.70 and 1.73/day at 35, 50 and 60 degrees Celcius respectively. The economic impact of anaerobic whey treatment was evaluated for small, medium and large cheese plants, and annual operating costs were projected for a 20-year period. Among several systems that were compared, the anaerobic treatment of whey was shown to be the only one that had a potential of paying for itself. Treatment costs represented from 0.85 to 2.6% of the mean US milk price to producers.
- OSTI ID:
- 5440519
- Resource Relation:
- Other Information: Thesis
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
WHEY
ANAEROBIC DIGESTION
BENCH-SCALE EXPERIMENTS
CHEESE
CHEMICAL OXYGEN DEMAND
ECONOMIC ANALYSIS
METHANE
MICROORGANISMS
OPERATING COST
PH VALUE
WASTE PROCESSING
ALKANES
BIOCONVERSION
COST
DIGESTION
ECONOMICS
FOOD
HYDROCARBONS
INDUSTRIAL WASTES
MANAGEMENT
MILK PRODUCTS
ORGANIC COMPOUNDS
PROCESSING
WASTE MANAGEMENT
WASTES
090122* - Hydrocarbon Fuels- Preparation from Wastes or Biomass- (1976-1989)
140504 - Solar Energy Conversion- Biomass Production & Conversion- (-1989)