Maintenance Technology September 2016 - 46
SOLUTION FOCUS
Left. In the Farm Frites effluent-treatment plant,
backwash and concentrates from membrane treatment
are recycled in the wastewater-treatment process,
which allows recovery of 45,000 liters of safe drinking
water each hour.
Below. At full capacity, the potato-waste-fueled
Waterleau New Energy plant near Ypres, Belgium,
produces 3.2 MW of green electricity-equivalent to
the energy needs for a city of 25,000 inhabitants.
ultrafiltration, backwashing is typically performed at fixed
intervals, during which the flow direction in the membranes
is reversed for a short period of time. This removes most of
the suspended-solids layer that has built up on the feed side
of the UF membrane. To improve backwash efficiency, it is
recommended to follow with a forward flush to remove the
suspended solids.
Reverse osmosis is a cross-flow filtration using highpressure, spiral-wound fouling-resistant membranes. Water
passes through the membrane, primarily by diffusing from
one bonding site to another. For safe effluent reuse in the food
industry, reverse osmosis is absolutely necessary to remove
salts and potential viruses. To allow the reverse osmosis to
operate in a stable manner, all suspended solids, colloidal
material, and bacteria, must be removed upstream through
ultrafiltration.
In the Farm Frites plant, backwash and concentrates from
the membrane are recycled in the wastewater-treatment
process, making the design even more unique. The process
allows the recovery of 45,000 liters of safe drinking water
each hour. De Watergroep, which is responsible for operation
and maintenance of the plant for 10 years, provides 24/7
monitoring.
Prior to implementing the Boomerang water-reuse solution,
Farm Frites had been relying on groundwater and drinking
water for its production process. For various reasons, those
sources are no longer practical.
Fortunately for potato processors and others, today's
methods of wastewater reuse have become broadly accepted
and economically feasible.
In fact, Waterleau leverages its water-reuse technology in
its own Anaerobic Digestion R&D center, the Waterleau New
Energy plant, located near Ypres, Belgium. There, all needed
process water is recovered from digested waste streams by the
company's Boomerang technology.
With chemical oxygen demand and nitrogen levels close
to zero, the recovered water-as clean as tap water-is used
for cleaning, to feed the cooling tower, or for liquid-polymer
preparation.
46 |
MAINTENANCE TECHNOLOGY
Saving energy
Despite today's lower oil prices and growing demand for
waste products, anaerobic digestion is becoming a strategic
and sustainable solution. While the technology has long
been present in the brewery industry, the potato-processing
industry has only recently begun to catch up.
The Waterleau New Energy plant itself is fueled by potato
waste. Nearly 40% of the organic waste treated in the facility,
i.e., potato peels, gray starch, french fries, and different fats,
originates in the potato-processing industry. At full capacity,
the site produces 3.2 MW of green electricity, which is equivalent to the energy needs for a city of 25,000 inhabitants.
Bottom line
Depending on the plant characteristics, bio-effluent recovery
can be an effective way to reduce water intake and create clean
energy, especially in food and beverage operations. Once the
project characteristics have been assessed and the correct
processing technologies are in place, sites can realize significant cost savings and operate more efficiently.
To date, Waterleau has built 30 wastewater and potatowaste-treatment plants. That's because wastewater and potato
waste have become major contributors to keeping energy bills
under control. According to the company, as much as 60% of
the power needs of a potato-processing plant can be recovered
from anaerobic treatment of bio-effluent and potato waste. MT
For more information on Waterleau's water and wastewater
solutions, visit waterleau.com.
SEPTEMBER 2016
http://www.waterleau.com
Table of Contents for the Digital Edition of Maintenance Technology September 2016
Editorial
Uptime
On The Floor
Old-School Approach To New-World Technology
Art Meets Reliability Science
Commit To Safety
Robot-Human Interaction Getting Safer
Sanitary, Stainless Conveyors Not The Same
Reduce Hidden Process-Safety Costs
Pace Your Reliability Program
Win The War With 'Lubrication By Design'
SAP Tips And Tricks
Understand Pump Vibration
Select The Right Relay
Bearing Care
Clear Up HOA Confusion
Potato Waste Becomes Clean Water, Energy
Products
Showcase
Ad Index
Final Thought
Maintenance Technology September 2016 - 1
Maintenance Technology September 2016 - Cover1
Maintenance Technology September 2016 - Cover2
Maintenance Technology September 2016 - 1
Maintenance Technology September 2016 - 2
Maintenance Technology September 2016 - 3
Maintenance Technology September 2016 - Editorial
Maintenance Technology September 2016 - 5
Maintenance Technology September 2016 - Uptime
Maintenance Technology September 2016 - 7
Maintenance Technology September 2016 - On The Floor
Maintenance Technology September 2016 - 9
Maintenance Technology September 2016 - Old-School Approach To New-World Technology
Maintenance Technology September 2016 - 11
Maintenance Technology September 2016 - 12
Maintenance Technology September 2016 - 13
Maintenance Technology September 2016 - 14
Maintenance Technology September 2016 - 15
Maintenance Technology September 2016 - Art Meets Reliability Science
Maintenance Technology September 2016 - 17
Maintenance Technology September 2016 - 18
Maintenance Technology September 2016 - 19
Maintenance Technology September 2016 - Commit To Safety
Maintenance Technology September 2016 - 21
Maintenance Technology September 2016 - 22
Maintenance Technology September 2016 - 23
Maintenance Technology September 2016 - Robot-Human Interaction Getting Safer
Maintenance Technology September 2016 - 25
Maintenance Technology September 2016 - Sanitary, Stainless Conveyors Not The Same
Maintenance Technology September 2016 - 27
Maintenance Technology September 2016 - 28
Maintenance Technology September 2016 - Reduce Hidden Process-Safety Costs
Maintenance Technology September 2016 - 30
Maintenance Technology September 2016 - Pace Your Reliability Program
Maintenance Technology September 2016 - 32
Maintenance Technology September 2016 - 33
Maintenance Technology September 2016 - 34
Maintenance Technology September 2016 - 35
Maintenance Technology September 2016 - Win The War With 'Lubrication By Design'
Maintenance Technology September 2016 - 37
Maintenance Technology September 2016 - 38
Maintenance Technology September 2016 - SAP Tips And Tricks
Maintenance Technology September 2016 - Understand Pump Vibration
Maintenance Technology September 2016 - Select The Right Relay
Maintenance Technology September 2016 - Bearing Care
Maintenance Technology September 2016 - 43
Maintenance Technology September 2016 - Clear Up HOA Confusion
Maintenance Technology September 2016 - Potato Waste Becomes Clean Water, Energy
Maintenance Technology September 2016 - 46
Maintenance Technology September 2016 - 47
Maintenance Technology September 2016 - 48
Maintenance Technology September 2016 - 49
Maintenance Technology September 2016 - 50
Maintenance Technology September 2016 - 51
Maintenance Technology September 2016 - 52
Maintenance Technology September 2016 - Showcase
Maintenance Technology September 2016 - Ad Index
Maintenance Technology September 2016 - 55
Maintenance Technology September 2016 - Final Thought
Maintenance Technology September 2016 - Cover3
Maintenance Technology September 2016 - Cover4
Maintenance Technology September 2016 - 62
Maintenance Technology September 2016 - 63
Maintenance Technology September 2016 - 64
Maintenance Technology September 2016 - 65
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