Page 18 - Trihydro Sustainability Report

USE OF COAL ASH IN CONSTRUCTION PROJECTS & LAND REUSE ON A
BROWNFIELDS SITE
NORTH FL

Over the past two years, Trihydro has been involved in the redevelopment of a 110-acre port property in North
Florida. This successful Brownfields project has incorporated several sustainable redevelopment components,
in many of which Trihydro has participated. Specifically, coal ash has been beneficially used in construction
projects, including the construction of sub-base for an 8-acre wood processing facility, a 4-acre storage pad,
and a 3-acre storage pad expansion. The use of coal ash in this manner provides beneficial use of the coal
ash material but also serves as a substitute for other non-sustainable materials such as asphalt and concrete.
Additionally, approximately 4 acres of designated landfill were excavated (clean closed) in order to provide
land area for construction of a new state-of-the-art lime kiln at the port. The excavation of this decades-old
designated landfill area, upon which a new kiln is to be constructed, is an excellent example of land conservation
and sustainability.

PILOT TEST OF WIND-DRIVEN AIR
SPARGING
FORMER REFINERY, WY

As part of a multi-year pilot test, Trihydro is exploring the use of
wind-powered air sparging in an effort to remediate groundwater
at a former refinery in Wyoming. The system uses windmill-
driven compressors that develop an air pressure of up to 15
psi via a diaphragm pump within the turbine head, which then
powers the air sparge system below. Historically, systems of this
type have been ineffective due to their low radius of influence,
but Trihydro has overcome this shortcoming by developing a
pneumatic “discharge governor” that stores compressed air and
then delivers it in discrete pulses at higher pressure. Because
these systems are self-sufficient in terms of energy, they are
relatively inexpensive, environmentally sustainable, and suitable
for quick installation in remote locations.