The Acimet{reg_sign} Process: An innovative approach to biogasification of municipal sludge

Conference · Fri Dec 31 04:00:00 EST 1993

OSTI ID:140345

Ghosh, S ^[1]; Buoy, K ^[2]

---

1. Univ. of Utah, Salt Lake City, UT (United States)
2. DuPage County Dept. of Public Works, Wheaton, IL (United States)

This paper reports the results of successful completion of an advanced anaerobic-digestion-process commercialization program supported by the County of DuPage, IL and the State of Illinois Department of Energy and Natural Resources, Springfield, IL. The project entailed anaerobic digestion of municipal sludge by pilot- and full-scale Acimet Process, which replaced an existing high-rate digestion system. The project was conducted at the Woodridge-Greenevalley wastewater treatment plant of DuPage County, IL. The Acimet Process relies on the application of two-phase anaerobic digestion for enhanced methane production and stabilization of municipal sludges, the disposal of which poses intractable problems in many municipal wastewater treatment plants. Unlike conventional anaerobic digestion processes, the Acimet System optimizes the liquefaction- acidification and acetogenic-methanogenic fermentations in separate acid- and methane-phase digesters operated at different hydraulic residence times (HRTs) to maximize feed hydrolysis and acidification, as well as biomethanation of the acidic intermediates. The Acimet System installed at the Woodridge Plant utilizes two mesophilic upflow digesters of novel design exhibiting unusually high product-formation efficiencies achieved without any mechanical mixing of the reactor contents.

• Research Organization: National Renewable Energy Lab., Golden, CO (United States)
• OSTI ID: 140345
• Report Number(s): NREL/CP--200-5768-Vol.1; CONF-9308106--Vol.1; ON: DE93010050
• Country of Publication: United States
• Language: English

Related Subjects

09 BIOMASS FUELS
ACIDIFICATION
ANAEROBIC DIGESTION
BIOGAS PROCESS
COMMERCIALIZATION
DEMONSTRATION PROGRAMS
DESIGN
GASIFICATION
HYDROLYSIS
LIQUEFACTION
METHANE
MUNICIPAL WASTES
PRODUCTION
RENEWABLE ENERGY SOURCES
RENEWABLE RESOURCES
SLUDGES
STABILIZATION
WASTE MANAGEMENT
WASTE WATER