Carver-Greenfield process

T0199 Dehydro-Tech Corporation, Carver-Greenfield Process... 

T0193 Current Environmental Solutions, L.L.C., In Situ Corona T0194 Current Environmental Solutions, L.L.C., Six-Phase Soil Heating T0197 Dames and Moore, Two-Phase Vacuum Extraction T0199 Dehydro-Tech Corporation, Carver-Greenfield Process T0200 Delphi Research, Inc., DETOX... 

T0197 Dames and Moore, Two-Phase Vacuum Extraction T0199 Dehydro-Tech Corporation, Carver-Greenfield Process T0200 Delphi Research, Inc., DETOX... 

Privatized Biotherm Process plants (i.e., plants developed on a bnild, own, and operate basis by American Biotherm, L.L.C.) to dry municipal sewage sludge are being developed. The Dehydro-Tech Corporation, the developer of the Carver Greenfield Process, became American Biotherm, L.L.C., in late December 1996. American Biotherm, L.L.C. now commercially offers the Biotherm Process. 

The Carver-Greenfield process (C-G process) is a patented drying and solvent extraction process designed to separate oil-soluble contaminants from liquid, solid, or slurry wastes. The process has been used extensively over the last 30 years to dry and extract compounds from a variety of wet, oily solids in various industries. C-G process units may consist of modular designs or custom made for large-capacity operations. 

The U.S. Environmental Protection Agency (EPA) has published detailed cost estimates for the CF systems process and the Carver-Greenfield process, which include technology-specific costs and a breakdown of site-specific costs. In estimating costs for the CF Systems Process, the U.S. EPA postulated the following scenarios ... 

The EPA s estimate for the Carver-Greenfield process assnmed treatment of 23,000 ton of drilling mud contaminate with petrolenm wastes. The total cost estimate was 523/wet ton, with 221/ton allocated to technology costs. Site costs were estimated to be 302/ton, including 240/ton for incineration of contaminated residnals. This estimate did not include regulatory, permitting, and analytical costs becanse of their variability (D11243W, p. 5.4). 

MJ/kWh (10,400 Btu/kWh), mechanical vapor recompression can vaporize 1 kg of water for less than 0.46 MJ (1.0 lb for less than 200 Btu). The Carver-Greenfield process is based on combining mechanical vapor recompression with multiple-effect evaporation to dry high-water-content biomass and other solid suspensions. Many full-scale units have been placed in operation since the first facility was installed in 1961. One unit was used at the Hyperion wastewater treatment plant in Los Angeles from 1987 to early 1995 to dry 40 t/day of biosolids wetcake to 99+% total solids content (Haug, Moore, and Harrison, 1995). The process has since been replaced by rotary steam dryers because it was not possible to reach the design capacity of the unit. 

Carver-Greenfield process for extraction of oily waste Chemtect gaseous waste treatment freeze separation membrane microfiltration... 

This manual focuses on thermal treatment processes for wastewater treatment sludges. Processes indude multiple-hearth and fluid-bed furnaces, wet air oxidation, disk dryers, and the Carver-Greenfield process. Also cSscussed are heat recovery, stack gas cleaning, emissions, combustion theory, fuel use. solids preparation, and ash management... 

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