61% fermentable blend containing lactate and other fermentable materials and water-soluble nutrients including B vitamins and yeast factors.
98% fermentable blend containing both quick-release ethyl lactate and slow-release long-chain oleaginous materials.
The proprietary nutrient blend of yeast metabolites including B-vitamins and other soluble nutrients.
100% natural product that is comprised of chitin (a natural polysaccharide), proteinaceousmaterial, and calcium carbonate.
98% fermentable electron donor for sites where sodium and metals are a concern.
A readily soluble food grade 60% sodium or potassium lactate solution.
WilkeyWhey™ can be stored for extended periods of time if kept dry.
It contains up to 95% fermentable material.
Our approach to substrate dosing is based on site conditions.
JRW Bioremediation L.L.C. provides substrates and nutrients for anaerobic bioremediation. The substrates provided include highly soluble materials such as WILCLEAR® sodium and potassium lactate, SoluLac® ethyl lactate, and Wilke Whey® whey powder and slowly soluble substrates including LactOil® soy microemulsion, and ChitoRem® chitin complex.
As the remediation business has changed JRW strives to stay at the forefront of technology development to improve substrate distribution and performance as well as prove concepts for the remediation of emerging contaminants. We recognize that the keys to a successful bioremediation program are understanding the conditions limiting substrate distribution and optimizing microbial metabolism. If you can’t get proper distribution, you won’t be able to promote the right microbial activity to transform your contaminant.
Although this is a basic concept of enhancing bioremediation, it is still not widely ingrained in the consulting industry. A great example is the evolution of the concept of the use of emulsified vegetable oil (EVO). Early work concentrated on the slow dissolution properties of vegetable oil in order to provide a long-lasting substrate. It was quickly recognized that neat vegetable oil dissolves slowly but it also has properties that can limit its distribution in the subsurface. The perceived solution was to emulsify neat oil to overcome some of those distribution issues. Initially, field emulsions were used and then pre-emulsified products were introduced to improve product quality.
Since the idea was to obtain better distribution, the race quickly revolved around how to make smaller emulsion particles. The industry settled into this paradigm until the overall benefits of EVO were well documented and proven on large numbers of sites. As more companies entered the market a move to reduce costs began to permeate the industry. This led to an apparent attempt to move toward less expensive common emulsions with little regard toward particle size. In other words, cost trumped particle size, and presumably, possibly distribution as the industry seemed to reverse itself in regards to particle size. The interesting thing is that the very basic concept of providing proper substrate distribution to attain and maintain conditions conducive to promoting complete degradation of the constituent of concern within the treatment zone hasn’t changed. Maybe how to accomplish this has.
JRW recognizes that there is not one perfect substrate applicable to all sites. Some substrates like the highly soluble WILCLEAR® family of substrates (WILCLEAR® 60% sodium lactate concentrate and WILCLEAR Plus® lactate plus Accelerite® are appropriate for a wide range of approaches but some situations can benefit from less soluble substrates like LactOil® soy microemulsion and ChitoRem® chitin complex or even combinations of substrates. This flexibility allows the practitioner the opportunity to concentrate their resources on how to attain and maintain the proper subsurface conditions while optimizing costs to reach the goals of their project.
Contact JRW to discuss options to address your specific situation.
Enhanced reductive dechlorination is based on attaining and maintaining control of an aquifer for a period of time sufficient to degrade all constituents of concern and their daughter products. Attaining and maintaining control of an aquifer is highly dependent on the hydrogeology and geochemistry of the site along with the microbial populations present. Since the hydrogeology and geochemistry is different for every site, a blanket cost can not be given for any specific site. In general, enhanced reductive dechlorination will cost less than $10 per cubic yard of media treated on most non-DNAPL sites. This compares with about $60 per cubic yard for excavation (without disposal) and about $90 per cubic yard for chemical oxidation.
In some cases, MCLs can be attained with enhanced reductive dechlorination. Much more frequently, reductions in contaminant mass of one to two orders of magnitude are common.
Because freight is costed from a warehouse to a delivery point, freight costs are quoted separately. Unless otherwise stated, due to the volatility of the fuels market, freight costs are generally valid for 30 days. Consideration should be given to the receiving facility’s capacity to off load a truck. In situations where the product is delivered to a facility without the capacity to off-load a delivery vehicle, arrangements can be made (for an additional charge) for delivery on a vehicle with a lift gate and pallet jack.
Reinjection schedules should be based on the geochemistry of an aquifer and not on a calendar schedule. In many cases, multiple injections can be spaced further apart over time.
Since the main goal of adding a substrate to an aquifer is to attain and maintain anaerobic conditions for an extended period of time, because of the limited flows clay sites should be ideal for enhanced reductive dechlorination. In practice, clay sites with adequately spaced injection points usually show very rapid response to substrate addition.
Injection spacing should be sufficient to promote robust reductive dechlorination throughout the treatment zone for a time sufficient to attain complete reductive dechlorination. Injection spacing is dependent upon the dissolution rate of the substrate, the dosage, aquifer velocity, and competing electron acceptor and contaminant flux.