Comparative evaluation of mesophilic and thermophilic anaerobic digestion. Phase 1. Temperature-transition studies. Research report, October 1984-April 1986

Technical Report · Sun Jan 01 04:00:00 EST 1989

OSTI ID:6130500

Kugelman, I J; Guida, V G

A study of the operation of anaerobic systems under temperature transition was conducted as part of a larger study of mesophilic vs. thermophilic anaerobic digestion. Systems seeded with domestic sewage sludge, but subsequently fed a chemically defined complex medium, were operated at 20- and 30-day detention times at 35 C. The temperature was raised to 55 C at rates varying from 0.25 C to 2.5 C per day. As soon as the temperature exceeded 45 C methane production shut down; the units were held at 45 C until recovery occurred. Once recovery of methane production ability occurred, transition to 55 C took place with little incident. The rate of temperature rise had little effect on the total time required to obtain stable operation at 55 C; detention time had a minor effect with longer detention time yielding superior results. Studies of temperature drop and steady-state comparison between mesophilic and thermophilic operation also were conducted.

• Research Organization: Lehigh Univ., Bethlehem, PA (USA)
• OSTI ID: 6130500
• Report Number(s): PB-89-151393/XAB
• 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
320604 -- Energy Conservation
Consumption
& Utilization-- Municipalities & Community Systems-- Municipal Waste Management-- (1980-)
ALKANES
ANAEROBIC DIGESTION
BIOCONVERSION
BIOSYNTHESIS
CHEMICAL ANALYSIS
COMPARATIVE EVALUATIONS
DIGESTION
DOCUMENT TYPES
HYDROCARBONS
MANAGEMENT
METHANE
ORGANIC COMPOUNDS
PHYSICAL PROPERTIES
PROCESSING
PROGRESS REPORT
SLUDGES
SYNTHESIS
THERMODYNAMIC PROPERTIES
WASTE DISPOSAL
WASTE MANAGEMENT
WASTE PROCESSING