Caribbean, Mexico fighting sargassum with heavy-duty machines

Two companies, one U.S.-based and the other French, recently
found themselves in the front lines in the battle to rid beaches of sargassum,
the stinky, brown, ugly masses of floating seaweed that are carpeting the
shorelines of popular destinations in the Caribbean and Mexico’s Yucatan
Peninsula.

Sargassum shows up every year, but this summer’s onslaught
is the largest on record, leading Brian Lapointe, a professor and oceanographer
with Florida Atlantic University’s Harbor Branch Oceanographic Institute, to
declare it “the worst year ever. I’d say we’ve hit a crisis level.”

That makes it a good year for Connecticut-based H. Barber
Sons, which has manufactured beach-cleaning equipment since 1966, and CDO
Innov, a French company that manufactures industrial equipment used for
environmental issues.

Sargassum presents several challenges as well as a
rotten-eggs odor. On many beaches, the stuff washes up with every tide. Workers
can rake it and remove it in the morning, only to have it return on the next
tide, pushed along by ocean currents and winds.

It also poses a major disposal problem.

Chris Kelly, director of sales and marketing for H. Barber
Sons, outlined some scenarios for getting rid of the muck, but he
admitted that “none are perfect.”

“Disposal depends on where the beach is located,” Kelly
said. “In Galveston, where they had catastrophic amounts of sargassum in 2014,
they’d stockpile it on a remote part of the beach far from sunbathers and
swimmers, let it dry out and decompose and then use it to build up the dunes.
The problem with that is that it attracts flies and insects, and it stinks.
Some places use it for fertilizer or mulch, but many times it ends up going to
a landfill.”

He was on site in Guadeloupe two weeks ago, training workers
to use his company’s patented Surf Rake machine, first manufactured in 1966 and
redesigned in 2010.

“This machine picks up 95% of the sargassum and other algae
on a beach,” he said. “It does not pick up the surrounding wet sand, so the
beach is not being eroded. It’s not a complicated machine to operate, but it
does require initial training.”

H. Barber Sons’ rakes have been the go-to solution for
several big resorts in the Yucatan, whose beaches have been plagued by
sargassum this year.

“There are 50 Surf Rakes in operation in the Yucatan,” Kelly
said. “Some of the bigger resorts buy them outright. Others are bought by
contractors that the resorts and municipalities hire to clean up the beaches.
Each machine is $65,000, so it’s a big investment.”

Among the resorts in Cancun and the Riviera Maya that have
the Surf Rake in their seaweed-cleanup arsenal are the Moon Palace Golf
Spa Resort, Mayan Palace Riviera Maya, Grand Palladium Riviera Resort
Spa, Grand Riviera Princess, Viva Wyndham Maya and three resorts in the
Mayakoba complex: Banyan Tree Hotel Resort, Fairmont Mayakoba and
Rosewood Mayakoba.

Some of the smaller Caribbean islands, like Guadeloupe and
Martinique, depend upon contractors who own the machines to clean the beaches.

“Tourists expect clean beaches, so it’s not a problem that
can be ignored,” Kelly said. 

He estimated that there are more than 1,000 Surf Rake
machines in operation around the world.

His chief competitor is CDO Innov, a company headquartered
in Machecoul, a small town in western France. One of its solutions is an
amphibious vehicle called AMP, which can execute many tasks, including
collecting mounds of seaweed on the beach, at the waterfront and in the sea.

The vehicle has a suction nozzle connected to a
high-capacity pumping system.

To develop AMP, CDO Innov partnered with another French
company, Thomsea, a leader in marine spill equipment and the inventor of the
engine-driven seaweed action pump.

“The solution is very effective and can collect 25 tons of
seaweed per hour,” said Guillaume Amiand, marketing communications officer, who
added that the AMP system is designed to collect sargassum without destroying
native flora and fauna.

CEO Cyril Thabard said, “The testing we have done guarantees
that any living creature sucked up with our system [i.e. shrimp, eels or fish]
emerges alive and well. Our machines also do not damage the turtles’ nests on
the beaches.”

Once the sargassum is collected, it goes to recycling
centers; it can be used to make plastic bags, clothing, paper and fertilizer.

“We live in the west of France in Brittany,” Thabard said.
“And we’ve been recycling green seaweed for quite a while, so we are at the
cutting edge of technology due to the involvement of many science labs in the
area.”

Like H. Barber Sons, CDO Innov has been marketing its
solutions to several resorts and destinations in the Caribbean. Its machines
start at $50,000 each, and the company said that training is imperative to
guarantee the machine’s best performance.

CDO Innov executives said they are currently in talks with
resorts in the Dominican Republic, the Bahamas, Jamaica and Belize about
purchases of the AMP, which is already in use in Guyana and Brazil.

Not every resort or destination is looking to heavy equipment
to fix the problem. Dreams Riviera Cancun Resort Spa recently staged its
own cleanup initiative involving teams of employees who competed to collect and
remove the most seaweed from the resort’s beach, with cash prizes going to the
top three teams. The resort reported that over the past three weeks, more than
23 tons of the weeds and resulting muck were collected and removed.