POWER August 2012 - 33

2012 MARMADUKE AWARD
Combined Solar Technologies'
Hybrid Plant: Using Wastewater
and Olive Pits to Produce Clean
Water and Clean Energy
Courtesy: Combined Solar Technologies
Combined Solar Technologies (CST) has designed, built, owns, and operates a
water purification system located at the Musco Family Olive Co. facility in
Tracy, Calif., that burns olive pits to purify highly saline wastewater through
a distillation process while also producing electric power. For its pioneering
approach, CST is the winner of POWER's 2012 Marmaduke Award for
excellence in plant problem-solving. The award is named for Marmaduke
Surfaceblow, the fictional marine engineer and plant troubleshooter par
excellence, whose exploits were chronicled in POWER beginning in 1948.
By Angela Neville, JD
F
34
eatured in the Discovery Channel's
recent television special " Powering
the Future, " the Combined Solar Technologies'
(CST) innovative water purification
system began operating in 2010. The
Musco Family Olive Co. hired CST to help
its plant-the largest olive-canning facility
in the U.S.-better meet the California Water
Board's wastewater treatment standards.
The facility's one-of-a-kind system validated
CST's concept of using biomass fuel
combustion for wastewater treatment. The
system was designed to generate 375 kWh
of electricity and operates year-round.
The Musco facility processes more than
13 billion olives per year, each with a pit
that is a source of energy. The combustion
system burns about 24 tons of olive pits
per day to power its onsite water purification
system; no pretreatment is required
to utilize the olive pits as fuel (Figure
1). This helps the olive company by both
eliminating a waste stream and providing
free fuel.
www.powermag.com
The $4 million CST plant has many components
of a modern biomass power plant
with the major exception of the SteamBoy
brine boiler system. Conventional biomass
plants consume large amounts of clean
water to produce electricity; in contrast,
the CST plant produces large amounts of
clean water in the process of making electricity.
CST designed and built the unique
SteamBoy system, which includes a boiler,
condenser, and steam engine.
The creative force behind the invention
POWER | August 2012

http://www.powermag.com

POWER August 2012

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