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| Environmental Technology Listing |
Title of Listing: | | BIOCAT-II (TM) |
Category: | | Treatment Technologies |
Subcategory: | * | Water, All Listings |
Media: | | Groundwater |
Contaminants: | | Aromatic Hydrocarbons, Halogenated Hydrocarbons, |
Web Site: | | http://www.yestech.com/ |
Email: | | yes@imt.net |
Technology Description: | |
BIOREMEDIATION - IN SITU GROUNDWATER
The Biocat-II(TM) process for bioremediation - in situ ground water treats a variety of wastes including aromatic hydrocarbons and halogenated hydrocarbons. The process entails such means as control of oxidation-reduction potential, pH, salinity, temperatures, and addition of electron donor(s) and/or electron acceptor(s) to sequentially enrich in situ cultures of mircoorganisms capable of accomplishing the required biotransformations.
Injection and possibly, extraction wells are used to sequentially create in a contaminated groundwater zone, the required enrichment conditions. The microorganisms to be enriched may be those present naturally, or, if necessary, inoculation of the aquifer with other natural microorganisms may be practiced. In one embodiment, stoichiometric amounts of nitric acid, nitrate, or nitrous oxide, and/or a primary substrate such as acetate, are injected into a contaminated groundwater zone in an initial treatment step. Alternatively or sequentially, stoichiometric amounts of sulfuric acid or sulfate and/or a primary substrate such as acetate are injected into the contaminated groundwater zone. If necessary, inoculation of the zone with sulfate-reducing bacteria, such as Desulfobulbus propionicus, is practiced. Microbially generated alkalinity and/or sulfide will precipitate and immobilize heavy metals to the extent that the zone remains anoxic. If necessary, following utilization of available or added electron acceptors (e.g., nitrate or sulfate), methane-producing microorganism populations are enriched to accomplish dehalogenation reactions. If necessary, inoculation of the zone with appropriate methanogens, such as Methanosarcina barkeri and/or Methanosarcina vacuolata is practiced. If heavy metal immobilization is not required and further biotransformations are required, oxygen or hydrogen peroxide is injected into the contaminated zone to facilitate aerobic respiration. In some embodiments, heated water is injected into the contaminated zone to increase its temperature and increase biotransformation rates.
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Performance Status/
Limitations: | |
Limitations:
The BIOCAT-II(TM) process is applicable in situations in which a sequence of environments such as (denitrifying and/or sulfate-reducing and then methane-producing can be induced to occur in a zone of contaminated groundwater.
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Topics
Bioremediation/Biodegradation, Technologies, Treatment/Remediation
Additional Topics/Tags/Keywords
Bioremediation, Groundwater |
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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