Redox Tech Introduces NuBuff

Based upon market demand, Redox Tech is now providing its pH buffer as a stand alone product. Redox Tech has been adding this buffer to their carbon amendment for over a decade. Proper pH is crucial to sustain and enhance biological remediation in the subsurface. Organisms require an environment that supports their growth, reproduction, and overall survival. We have developed a water soluble formula called NuBuff that can be applied in the subsurface by injection, soil mixing, or direct application in excavations. NuBuff not only modifies and sustains pH within the desired range (~6-8), it also provide essential nutrients for micro-organisms.

NuBuff can be provided as a powder (typically in 5 gallon buckets approximately 40 lbs dry weight) that is easily mixed with injection water on site or it can be shipped as a liquid in concentration appropriate for direct application to the site. Sizes range from 5 gallon buckets to 330 gallon totes to tankers as desired.

NuBuff is typically applied as an aqueous based fluid that is easy to inject and contains a suite of pH buffers and adjusters, as well as biological nutrients that are combined and formulated based on site-specific parameters and goals. We use dipotassium phosphate, ammonium phosphate, sodium bicarbonate and other carbonate products.

NuBuff has always been used in our ABC product and like the other components of ABC such as carbon substrates and micronutrients, the quantity and composition is formulated specifically to address each site’s needs and conditions.

The organisms commonly recognized to degrade contaminants are tolerant of a range of pH conditions but as with most organisms, they prefer near neutral pH. For example, the bacteria for complete dechlorination of PCE and its daughter products, DHC ethenogenes 195, prefers a pH between 6.8 and 7.5 but like other neutrophiles can thrive in pH between approximately 6 and 8. For petroleum degrading bacteria, the optimal range is typically a bit wider (range from 6 to 9) with a larger assortment of organisms that are capable. Although contaminant degrading extremophiles that can tolerate lower and higher pH exist, most remediation situations rely on the neutrophiles. Maintaining a neutral pH also helps minimize transport of other chemicals such as dissolved metals.

The amount of buffer required depends upon a number of factors such as contaminant load, groundwater flow rate, background pH, carbon substrate, etc. Redox Tech, as always, will assist with estimating your buffer needs.

Redox Tech, LLC Renews Comarketing Relationship with Carus Corporation

Redox Tech, LLC and Carus Corporation have joined forces to comarket products for aerobic and anaerobic bioremediation. Carus will market and sell the following products offered by Redox Tech: ABC®and ABC+ for reductive approaches, and OBC and OBC+ for oxic-aerobic remediation. The Redox Tech product line consists of high quality and field-proven products that are cost competitive. These additional product offerings will complement the bioremediation and chemical oxidation products already available to our customers through Carus Remediation Technologies (CRT).

We are pleased to offer these complementary bioremediation products that can meet the substrate requirements for a variety of bioremediation site design strategies.  Our customers can now choose between CRT’s 100% fermentable carbon CAP18®and CAP18 ME®anaerobic bioremediation products that provide a sustained source of hydrogen or Anaerobic BioChem (ABC®) which is specifically formulated for each site with a combination of fast- and slow-releasing water soluble substrates. When customers need the option of adding zero valent iron (ZVI), ABC+ is available.

 

ABC® and ABC+ Applied at Over 350 Sites

Anearobic BioChem (ABC) is a proprietary carbon substrate that is produced and marketed by Redox Tech. First introduced to the market in March 2003, the product was developed to allow remediation engineers the flexibility in changing specific components within the mixture to best compliment existing site geochemistries, which can vary considerably from site to site.

New Soil Blender Debuts in Cambridge, Mass

After 2 years of design and fabrication, Redox Tech’s new In Situ Soil Blender was put to test at a construction site in Cambridge, Mass. The new soil blender, designed to provide a more powerful and efficient mode of soil blending, was used to mix 52,000lbs of ABC+ into 27,000 cubic feet of soil, targeting depths from ground surface to 15 feet bgs. The purpose of this work was to treat 1,2-dichloroethane (1,2-DCA) in soil and groundwater (concentrations between 18 and 1200ppm).