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First Annual Southeastern In Situ Soil & Groundwater Remediation Conference |
Anaerobic BioChem (ABC®) Redox Tech, LLC has developed a
proprietary formulation to promote anaerobic biodegradation of halogenated
solvents in groundwater. The product, Anaerobic Biochem ABC®
1, is a patented mixture of lactates, fatty acids, and a phosphate
buffer. ABC®
contains soluble lactic acid as well as slow- and long-term releasing
components. The phosphate buffer provides phosphates, which are a micronutrient
for bioremediation. In addition, the buffer helps to maintain the pH in a range
that is best suited for microbial growth. Using a GeoProbe®
and proprietary injection equipment, Redox Tech is able to inject ABC®
in most geologic environments, including low-permeability silt and clay. For low
permeability environments, Redox Tech utilizes hydraulic fracturing. Many common organic groundwater
contaminants can be treated in situ by enhanced anaerobic processes. These types
of contaminants include chlorinated solvents, some chlorinated aromatics,
nitroaromatics, inorganics (e.g. nitrate and perchlorate), and metals (e.g.
chromium). With anaerobic biodegradation, the target contaminants are
"reduced" with hydrogen, unlike chemical oxidation or aerobic
processes where oxygen is the working chemical. For optimal anaerobic
degradation to occur, more energetically favorable electron acceptors such as
oxygen, nitrate, manganese, ferric iron or sulfate must first be consumed. There
also must be sufficient carbon source or food for the bacteria to thrive. Carbon
sources can include co-contaminants such as petroleum hydrocarbons or natural
organic matter. If these carbon sources are not metabolically available or are
not sufficient, the anaerobic process can be enhanced by introducing a food
source into the subsurface. One of the most effective and environmentally benign
food sources are fatty acids, which are found in ABC®
. However, care must be taken not to overstimulate the bacteria, because in some
instances, the desired bacteria may be overwhelmed by other bacteria (such as
methanogens). This is why ABC®
has slow- and long-term release compounds. In addition, in some instances, the
bacteria that are necessary to obtain the desired results are not at the site.
Often review of the site specific data a priori can determine this. In some
instances, fairly simple microbiological tests may be recommended. Because enhanced anaerobic degradation
can be different for every site, Redox Tech carefully reviews site-specific data
before formulating a mixture. Redox Tech provides the added value of working
closely with the client in order to help avoid costly and embarrassing failures. ABC®
is buffered because anaerobic biodegradation results in the product of metabolic
acids, which can lower the pH and adversely affect the results. The pH buffer
also is provides a source of phosphate, which is known to be a micronutrient (aka
vitamin) for the bacteria. Perhaps one of the biggest advantages
of ABC®
results from its viscosity at ambient conditions. ABC®
has roughly the same viscosity as a mixture of sugar water. This means that
labor-intensive pre-heating is not necessary for injection. More importantly,
the radius of influence that can be obtained with conventional injection is much
larger for ABC®
because it will not become noticeably thicker as it comes in contact with often
colder soil and groundwater. ABC+ Through a license agreement provided by
Envirometals and Adventus, Redox Tech is now the only licensed and approved
company able to add zero valent iron to lactate products. We distribute and
market this product as ABC+. With this product, you can enjoy the benefits of
combining chemical and biological reduction. More information is provided below
for ABC+, including a product description and field data. Let Redox Tech help formulate an
enhanced anaerobic program for your site today. For more information contact: John
Haselow Redox
Tech, LLC 200
Quade Drive Cary,
NC 27513 Phone:
919-678-0140 FAX:
919-678-0150 1ABCÒ is protected by US Patent 6,001,252 and 6,472,198
Additional Info Site Profile for Cost Estimate |
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