Anaerobic sludge digestion with a biocatalytic additive. [Lactobacillus acidophilus]
Aimed at improving the process operating characteristics of anaerobic digestion for sludge stabilization and SNG production, this study evaluates the effects of a lactobacillus additive under normal, variable, and overload conditions. This whey fermentation product of an acid-tolerant strain of L. acidophilus fortified with CoCO/sub 3/, (NH/sub 4/)/sub 2/HPO/sub 4/, ferrous lactate, and lactic acid provides growth factors, metabolic intermediates, and enzymes needed for substrate degradation and cellular synthesis. Data indicate that the biochemical additive increases methane yield, gas production rate, and volatile solids reduction; decreases volatile acids accumulation; enhances the digester buffer capacity; and improves the fertilizer value and dewatering characteristics of the digested residue. Digester capacities could be potentially doubled when the feed is so treated. Results of field tests with six full-scale digesters confirm observations made with bench-scale digesters.
- OSTI ID:
- 6992457
- Resource Relation:
- Conference: 55. annual conference of the Water Pollution Control Federation, St. Louis, MO, USA, 3 Oct 1982; Related Information: IGT 6230
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
59 BASIC BIOLOGICAL SCIENCES
AMMONIUM PHOSPHATES
CATALYTIC EFFECTS
COBALT CARBONATES
HIGH BTU GAS
PRODUCTION
IRON COMPOUNDS
LACTIC ACID
LACTOBACILLUS
METHANE
SLUDGES
ANAEROBIC DIGESTION
BENCH-SCALE EXPERIMENTS
BIOREACTORS
FERTILIZERS
FIELD TESTS
GAS YIELDS
LACTATES
RESIDUES
WATER REMOVAL
ALKANES
AMMONIUM COMPOUNDS
BACTERIA
BIOCONVERSION
CARBON COMPOUNDS
CARBONATES
CARBOXYLIC ACID SALTS
CARBOXYLIC ACIDS
COBALT COMPOUNDS
DIGESTION
FLUIDS
FUEL GAS
FUELS
GAS FUELS
GASES
HYDROCARBONS
HYDROXY ACIDS
MANAGEMENT
MICROORGANISMS
ORGANIC ACIDS
ORGANIC COMPOUNDS
OXYGEN COMPOUNDS
PHOSPHATES
PHOSPHORUS COMPOUNDS
PROCESSING
REMOVAL
TESTING
TRANSITION ELEMENT COMPOUNDS
WASTE MANAGEMENT
WASTE PROCESSING
YIELDS
090122* - Hydrocarbon Fuels- Preparation from Wastes or Biomass- (1976-1989)
140504 - Solar Energy Conversion- Biomass Production & Conversion- (-1989)
550700 - Microbiology