Case Study: Revolutionary HERO™ Membrane Process Offers Economical ZLD Solution For An Arizona Power Plant
•Case Study: Revolutionary HERO™ Membrane Process Offers Economical ZLD Solution For An Arizona Power Plant
Griffith Energy LLC are developers of Griffith Energy Project a new 520 MW natural gas fired combined cycle facility located 8 miles south of Kingman, Mohave County, Arizona.
Black Veatch Corporation of Kansas City who were engineers for the project recognized HERO as the suitable economical process to deal with the cooling tower blow down reducing the waste by 90% and thus substituting a thermal brine concentrator at less than half the cost and enormous power saving.
The Problem
The cooling tower blow down volume was about 230 gpm saturated with
silica, high hardness and other constituents. A conventional membrane
process can not function under these conditionsdue to silica and other organic limitation. A thermal brine concentrator will be cost prohibitive. The permitting of the power plant was based on evaporation pond. Customer was looking for an economical solution to preconcentrate the blow down
and thus have a smaller size evaporation pond.
The Solution
HEROTM is a Patented process which
addresses the treatment of high silica,
organic and bio active feed water and
hence treatment of cooling tower blow
down enabling recovery and reuse of the
blow down water. HEROTM is a membrane
process with modified pre treatment
scheme to accommodate high silica
concentrations. HEROTM has been successfully
tested with silica level of 2000 PPM in
the reject. Wastewater recovery with
HEROTM process is limited only by osmotic
pressure. The process is resistant to organic
and biological fouling. System recovery of
90 % is achievable thus a good substitute
for thermal brine concentrator.
•Case Study: Revolutionary HERO™ Membrane Process Offers Economical ZLD Solution For An Arizona Power Plant