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| Environmental Technology Listing |
Title of Listing: | | Biocat (TM) |
Category: | | Treatment Technologies |
Subcategory: | * | Water, Soil, All Listings |
Media: | | Soil, Surface Water |
Contaminants: | | Organics and Inorganics |
Web Site: | | http://www.yestech.com/ |
Email: | | yes@imt.net |
Technology Description: | |
BIOREMEDIATION - SLURRY PHASE
Biocat (TM) technology is designed to remove organic and inorganic hazardous substances from soil (ex situ) and surface waters. Research to date has focused on removal of acidic metal sulfate solutions produced by mining activities. Future research will investigate the feasibility of the technology for removal of metals, sulfates, solvents, and hydrocarbons released at industrial and military sites.
The BIOCAT (TM) process comprises the steps of (1) acid phase anaerobic digestion of biomass to produce volatile acids and a partially stabilized sludge, (2) use of the volatile acids as a carbon source and electron donors for biological sulfate reduction for removal of acidity; metals and sulfate from acid mine drainage; and to produce acetate (3) use of the acetate solution as feed for methane phase anaerobic digestion to produce methane and to reduce the organic content of the effluent of the process, and (4) use of the methane to satisfy the energy requirements of the process. The methane may also be used as an energy source for temperature control of certain specific systems. The full-scale system may be operated in either batch, continuous, or semicontinuous mode, depending on the particular site requirements.
The process has several advantages over prior acid mine drainage bioprocessing schemes. A primary advantage of the technology is that acid phase anaerobic digestion (acidogenesis) of biomass is used to supply electron donors and carbon sources to the microbial sulfate reduction step of the process. The presumption here is that volatile acids (e.g., acetic acid, propionic acid, butyric acid, valeric acid, etc.) produced onsite by acidogenesis of biomass will cost less than purchasing preformed electron donors. This presumption is true if a source of large amounts of relatively easily digested biomass is available near the treatment site. Some other bioprocessing schemes call for use of biomass as a source of electron donors, but they also call for mixing the biomass with the acid mine drainage. This would result in production of a digested biomass that is a stabilized cut and is also contaminated with heavy metals. The proposed process, on the other hand, would produce a stabilized sludge that is metal-free and that could be used as a soil conditioner in mined land reclamation efforts.
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Performance Status/
Limitations: | |
Limitations:
The Biocat technology is designed to operate in environments containing sulfuric acid, in addition to other hazardous materials. If sulfuric acid is not present in adequate concentrations, additional acid may be required in order for the process to operate.
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Topics
Bioremediation/Biodegradation, Technologies, Treatment/Remediation
Additional Topics/Tags/Keywords
Bioremediation, Soil, Surface Water |
Organization: | | Yellowstone Environmental Science, Inc. |
Address: | | 920 Technology Boulevard
| Phone: | Description | Number |
City: | | Bozeman | | Primary | (406) 586-2002 |
State/Province/Territory: | | MT | 2. | | |
Zip/Postal Code: | | 59715 | 3. | | |
Country: | | United States | 4. | Fax: | (406) 586-8188 |
Branch Locations: | |
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