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TECHNICAL FAQ
>> What macronutrient levels are recommended for aerobic bioremediation?

>> How deep should I install the injection points?

>> The ground water contaminant concentrations increased after the injection. What happened?

>> Should I check for naturally occurring bacteria prior to using Cl-out or Petrox?

>> How can I determine whether the naturally occurring bacteria at the site can be stimulated to degrade the chemicals of concern?

>>If I have used potassium permanganate to treat ground water, can I follow up with CL-Out or Petrox microbes to treat residual contamination?

>>Are Cl-Out and Petrox compatible with ORC®?
Q> What macronutrient levels are recommended for aerobic bioremediation?

A> Nitrogen and phosphorus are the most important macronutrients for aerobic bioremediation. Commonly cited ratios of carbon, nitrogen and phosphorus for building cell mass are C:N:P=1:0.2:0.02. Given this ratio, if the concentration of a petroleum contaminant in ground water is 1 mg/l, the nitrogen and phosphorus requirements are approximately 0.2 and 0.02 mg/l respectively. This is a broad generalization that assumes the mass of a hydrocarbon is 90% carbon, which is true for most gasoline constituents, and therefore is a reliable rule of thumb for most situations.


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