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
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Maintenance Technology September 2016 - 50
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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
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