Energy and protein production from pulp mill wastes. Annual report, June 15, 1976--June 15, 1977

Technical Report · Thu Sep 01 04:00:00 EDT 1977

DOI:https://doi.org/10.2172/5380129· OSTI ID:5380129

Jurgensen, M F; Patton, J T

The effect of ozone treatment on spent sulfite liquor yeast plant effluent was studied. A 500 ml capacity packed column was constructed to efficiently react ozone with spent sulfite liquor (SSL) on a continuous flow basis. The SSL was reacted at pH 3.0 for 3 hours averaging an ozone consumption of 12.8 gm/1. It was found that pH tended to decrease during ozonation indicative of the formation of oxalic and other organic acids. Chemical oxygen demand (COD) decreased 13 percent from 101,000 to 88,000 mg/1. The SSL was rendered more biologically metabolizable as indicated by the biological oxygen demand (BOD) increase of 10.5 percent from 10,500 to 11,600 mg/1. The ozonated SSL was then fed to an anaerobic fermenter for conversion to fuel gas. The average gas production was 423 ml/day from 700 ml size fermenter at a retention time of 2.8 days. The fermenter effluent gas contained approximately 65 percent CH/sub 4/ and 35 percent CO/sub 2/. Total bacterial populations were found in excess of 147 x 10/sup 7/ counts/ml and approximately 70 percent of the bacteria present was methane bacteria while 30 percent proved to be Desulfovibrio. The fermenter liquid effluent exhibited a drop in BOD of 3200 mg/l corresponding to the amount of COD in the CH/sub 4/ produced. Torula yeast were observed to grow on ozonated SSL in contrast to no growth on raw SSL thus indicating a potential for protein production.

• Research Organization: Michigan Technological Univ., Houghton (USA)
• OSTI ID: 5380129
• Report Number(s): COO-2983-4
• Country of Publication: United States
• Language: English

Related Subjects

09 BIOMASS FUELS
090122 -- Hydrocarbon Fuels-- Preparation from Wastes or Biomass-- (1976-1989)
32 ENERGY CONSERVATION, CONSUMPTION, AND UTILIZATION
320305* -- Energy Conservation
Consumption
& Utilization-- Industrial & Agricultural Processes-- Industrial Waste Management
ALKANES
BIOMASS
CHEMICAL REACTIONS
CRYOGENIC FLUIDS
ENERGY CONSERVATION
ENERGY SOURCES
FLUIDS
FUNGI
HYDROCARBONS
INDUSTRY
LIQUID WASTES
MANAGEMENT
METHANE
MICROORGANISMS
ORGANIC COMPOUNDS
OXYGEN COMPOUNDS
OZONE
PAPER INDUSTRY
PLANTS
POLLUTION CONTROL
PROCESSING
PRODUCTION
PROTEINS
RENEWABLE ENERGY SOURCES
RESEARCH PROGRAMS
SULFITES
SULFUR COMPOUNDS
WASTE DISPOSAL
WASTE MANAGEMENT
WASTE PROCESSING
WASTES
WATER POLLUTION CONTROL
YEASTS