Greentech News for Immediate Release
EKOGRID In-Situ Remediation Removes Oil Pollution at Tallinn Site in Just Three Months
Oil pollution discovered after work began on a five story apartment building
Before construction began on the new five
story apartment block with underground parking and technical facilities in the
basement, the site was home to an 8.35MW boiler house with an underground oil
reservoir with four 50m3 containers and heated by shale oil.
When construction began on the new building,
oil pollution was discovered near the old oil reservoir. The soil was polluted
at a depth of 1.65-3.8m by petroleum products and phenols and was treated with
simple excavation and mass transfer.
However, it was subsequently found that the
natural sand layer beneath the already constructed new building was polluted
with PAH compounds and exceeded limits for residential land. With the building
and underground communications already completed, the builder decided that
further mass transfer was not possible without damaging the new building’s
structures.
EHT’s EKOGRID technology was selected to
clean the soil in-situ. The technology uses electrokinetic and chemical
reactions to promote bioremediation and oxidation of pollutants in soil and/or
groundwater. An electrokinetic field is created using interconnected steel
electrodes installed in the polluted ground with a control unit providing
pulsed power output.
Electrolysis of water
happens as the pulsed current makes the charged
contents of the pore water move quickly back and forward with short electro-osmotic pulses, and freshly
formed free radicals and oxygen promote oxidation of contaminants.
As a result of electron displacement, free
electron donors act as an energy source to microbes that break down various
organic pollutants. This means that EKOGRID is used not only for breaking down
hydrocarbons, but also promotes bioremediation.
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EKOGRID electrodes were installed in the Tallinn building’s basement through
the concrete flooring and
insulated for the part inside the concrete.
The
remediation process, that begun earlier this year lasted three months before
the analysis showed that the polluted site met the norms of the Tallinn City
Government. During the remediation period, construction continued as planned allowing
the new site to be completed on time.
“This oil remediation project in Tallinn demonstrates once again the sheer ingenuity of EKOGRID to solve many of the world’s polluted sites in-situ and in the shortest timeframe,” says Sami Humala, Sales Director of Eko Harden Technologies. “In this particular case, exporting polluted soil by mass transfer to another site was not feasible and the first phase of remediation by excavation did not eliminate all pollutants and only gave temporary relief.”
“Companies
operating in oil & gas, extractive, manufacturing and chemicals industries,
as well as ports & harbors, transportation and selected state sectors are
increasingly dependent on outsourced services for emergency spill and
environmental pollution response operations and hazardous waste management
solutions,” says Rasmus Guldbrand, Vice President of the Corena Group. “We’re
delighted to partner with EHT and use EKOGRID in our global service
operations.”
About EKOGRID™
Eko Harden and its groundbreaking in-situ
remediation technology EKOGRID is fast becoming the in-situ remediation
solution of choice of government agencies, municipalities, land developers and
energy companies alike to eliminate environmental disasters. EKOGRID electro
kinetic oxidation technology produces a controlled low voltage electric field
in a polluted area. The technology supports the growth of global wealth and
health in a sustainable manner by removing chemical pollutants in both land and
water “in situ” by advanced oxidation and enhanced bioremediation. The patented
technology has already proven to be an ecological, sustainable and
cost-efficient way for remediating the environment across the globe. Visit https://ekogrid.fi/.
Ends
For further information, executive
interviews and images, please contact:
Hugh Paterson, CEO, Whoosh PR
Direct
Landline +44 (0)1323
318720, Mobile +44 (0)77681 75452
Email: hugh.paterson@whooshpr.com