Two-stage upflow anaerobic digestion of concentrated sludge

Conference · Sat Jan 01 04:00:00 EST 1983

OSTI ID:5941018

Ghosh, S; Sajjad, A; Henry, M P; Bleakney, R A

The development of an innovative fermentation mode, two-stage digestion, and the application of a novel upflow reactor design to permit biogasification of high-solids-content wastewater sludges at higher loading rates and lower-than-normal hydraulic residence times (HRT) to obtain higher gas and methane yields and production rates and better effluent qualities than those achieved with conventional single-stage continuously stirred tank reactor (CSTR) digesters are presented. A bench-scale two-stage upflow system operated with primary sludge at a 5.6-day HRT (1.2 days for Stage 1 and 4.4 days for Stage 2) exhibited a methane yield of 6.8 SCF/lb VS added, which was about 350% higher than that from conventional digestion at the same HRT.

• Research Organization: Institute of Gas Technology, Chicago, IL (USA); Boston Gas Co., MA (USA)
• OSTI ID: 5941018
• Report Number(s): CONF-830567-2; ON: DE83902581
• Country of Publication: United States
• Language: English

Related Subjects

09 BIOMASS FUELS
090122 -- Hydrocarbon Fuels-- Preparation from Wastes or Biomass-- (1976-1989)
140504* -- Solar Energy Conversion-- Biomass Production & Conversion-- (-1989)
32 ENERGY CONSERVATION, CONSUMPTION, AND UTILIZATION
320604 -- Energy Conservation
Consumption
& Utilization-- Municipalities & Community Systems-- Municipal Waste Management-- (1980-)
ALKANES
ANAEROBIC DIGESTION
BIOCONVERSION
BIOREACTORS
DIGESTION
HYDROCARBONS
HYDROGEN COMPOUNDS
LIQUID WASTES
MANAGEMENT
METHANE
ORGANIC COMPOUNDS
OXYGEN COMPOUNDS
PROCESSING
PRODUCTION
SLUDGES
WASTE MANAGEMENT
WASTE PROCESSING
WASTE WATER
WASTES
WATER
YIELDS