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BIOGENESIS ENTERPRISES, INC.
(BioGenesis  Soil and Sediment Washing Processes)

This vendor is participating in the EPA Superfund Innovative 
Technology Evaluation (SITE) Program.  The following technology 
profile has been reproduced from the SITE Technology Profile 
document, 7th edition.  The SITE profile has been supplemented by 
MVA Consulting Inc. using information obtained from the vendor or 
from other SITE publications, referenced at the end of this file. 

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TECHNOLOGY DESCRIPTION:

The BioGenesis  processes use specialized, patent pending
equipment, complex surfactants, and water to clean soil,
sediment, and sludge contaminated with organic and inorganic
constituents.  Two types of mobile equipment wash different sizes
of soil particles (see figure below).  A truck-mounted batch
unit, processing 40 yards per hour, washes soil particles 10 mesh
and larger.  A full-scale, mobile, continuous flow unit cleans
sand, silt, clay, and sludge particles smaller than 10 mesh at a
rate of 20 to 80 yards per hour.  Auxiliary equipment includes
tanks, dewatering and water treatment equipment, and a
bioreactor.  Extraction effi-ciencies, per wash cycle, range from
85 to 99 percent.  High contaminant levels require multiple
washes.

The principal components of the process include pretreatment
equipment for particle sizing, a truck-mounted soil washer for
larger particles, a sediment washing unit(s) for fine particles,
and water treatment and reconditioning equipment.  The
Biogenesis  soil washing system for larger particles consists of
a trailer-mounted gondola plumbed for air mixing, water/chemical
addition, oil skimming, and liquid drainage.  Water, BioGenesis 
cleaning chemicals, and soil are loaded into the gondola. 
Aeration nozzles feed compressed air to create a fluidized bed. 
The resulting slurry is agitated to release organic and inorganic
contaminants from the soil particles.  After mixing, a short
settling period allows the soil particles to sink and the removed
oil to rise to the water surface, where it is skimmed for
reclamation or disposal.  Following drainage of the wash water,
the clean soil is evacuated by raising the unit's dump mechanism. 
Processed soil contains a moisture level of 10 to 20 percent 
depending on the soil matrix.

A prototype BioGenesis  sediment washing machine was tested in
Environment Canada's Contaminated Sediment Treatment Technology
Program.  The sediment washing machine is a continuous flow unit
(see figure on next page).  Capacities of up to 80 to 100 cubic
yards per hour are possible using full-scale, parallel processing
equipment.

Sediment is pretreated to form a slurry.  The slurry passes to a
shaker screen separator that sizes particles into two streams. 
Material greater than 1 millimeter (mm) in diameter is diverted
to the large particle soil washer.  Material 1 mm and smaller
continues to the sediment washer's feed hopper.  From there the
slurry is injected to the sediment cleaning chamber to loosen the
bonds between the pollutant and the particle.

After the cleaning chamber, the slurry flows to the scrubber to
further weaken the bonds between contaminants and particles. 
After the scrubber, the slurry passes through a buffer tank,
where large particles separate by gravity.  The slurry then flows
through hydrocyclone banks to separate solids down to 3 to 5
microns in size.  The free liquid routes to a centrifuge for
final solid-liquid separation.  All solids go to the clean soil
pile; all liquid is routed to wastewater treatment to remove
organic and inorganic contaminants.  Decontaminated water is
recycled back through the process.

The BioGenesis  cleaning chemical is a light alkaline mixture of
ionic and non-ionic surfac-tants and bioremediating agents that
act similarly to a biosurfactant.  The proprietary cleaner
contains no hazardous ingredients and its characteristics were
reviewed during the EPA SITE demonstration.

This technology extracts many inorganics, volatile and
nonvolatile hydrocarbons, chlori-nated hydrocarbons, pesticides,
polychlorinated biphenyls, polynuclear aromatic hydrocarbons, and
most organics from nearly every soil type, including clay.

STATUS:

The BioGenesis  soil washing technology was accepted into the
SITE Demonstration Program in June 1990.  The process was
demonstrated at a refinery site in Minnesota.  Results from the
demonstration have been published in the Innovative Technology
Evaluation Report (EPA/540/R-93/510) and the SITE Technology
Capsule (EPA/540/SR-93/510).  The reports are available from EPA. 
The BioGenesis  sediment washing technology is scheduled for PCB
testing under the SITE Demonstration Program in November 1994.

FOR FURTHER INFORMATION:

EPA PROJECT MANAGER:
Annette Gatchett
U.S. EPA
Risk Reduction Engineering Laboratory
26 West Martin Luther King Drive
Cincinnati, OH  45268
513-569-7697
Fax: 513-569-7620

TECHNOLOGY DEVELOPER CONTACTS:
Thomas Rougeux
BioGenesis Enterprises, Inc.
7420 Alban Station Blvd., Suite B-208
Springfield, VA  22150-2320
703-913-9700
Fax: 703-913-9704
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Sources of information in this profile:

EPA Superfund Innovative Technology Evaluation Program 
        Technology Profiles Seventh Edition, November 1994. 
        EPA/540/R-94/526.

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