INDUSTRY FOCUS WATER & WASTE TREATMENT PUMPING STATION UPGRADE
ECS Engineering Services has won the contract to redevelop and refurbish the Environment Agency’s Peakirk Pumping Station, near Peterborough. The aims of the project are to improve the whole drainage of the surrounding area and provide improved flood prevention capabilities. The flood defence system is based
on a pair of wooden pointing doors designed to prevent flood waters reaching properties upstream of the pumping station, which ECS is to reengineer. The doors will be refurbished and their mounting posts replaced. In addition, ECS has proposed a mechanical counterbalance system for closing the doors in periods of high water levels. Gaining access
to the pointing doors is a difficult part of this project. Hence a downstream channel isolation has been created using a temporary GEO dam system that is capable of maintaining a water level of over 3m - installed with diving contractors, this is the largest dam of its type installed in these conditions in the UK. In addition, ECS will provide a fully width adjustable stop log system designed to isolate 3m of water. ECS will also replace the existing
double automated weed screen cleaner with modern Landustrie machines and will upgrade the existing overhead manually operated travelling building cranes by installing electrical drives and hoist systems.
ECS Engineering Services
www.ecsengineeringservices.com
CONTRACTS AWARDED ON PRICE AND WHOLE-LIFE COST
Package treatment plant specialist WPL has won three contracts with public utility Scottish Water after a competitive procurement process. The company will supply submerged aeration filter (SAF) plants, conical settlement tanks and hire equipment. The frameworks will be in place for five years with an option to extend the agreements for a further three years. Utility and industrial sales
manager at WPL, Andrew Haywood said: “WPL has a long history as a supplier to Scottish Water but that will now take a step up. We were awarded these three framework agreements not just on technical expertise but also on pricing and whole-life cost.” WPL will be one of two SAF
suppliers to Scottish Water and the exclusive supplier of conical primary settlement tanks up 6m in diameter. WPL also has exclusivity on hire of SAF wastewater treatment units, microscreens and lamella clarifiers. WPL has previously worked
closely with Scottish Water to create bespoke plants for remote and environmentally sensitive areas. In the Quality & Standards V regulatory period (2015-2021), the vast majority of wastewater treatment replacement projects are for smaller, more exposed works, where the utility is seeking to minimise the visual impact on
REDUCING THE RISK OF FAILURE
Scottish Water has cut the risk of pump set failure at its Mannofield water treatment works in Aberdeen with the installation of an ABB motor and low harmonic variable-speed drive. The 560kW matched AC motor and drive replace a soft start and 30-year-old motor on a pump set at the treatment works, solving recurring failures. The pump set is one of three at the Mannofield site, which are used in a rotating duty, assist and standby configuration. The pump sets are critical to the treatment works. If they fail, water supply to Aberdeen would be cut off. The original panel for the pump set had an ABB variable-
speed drive and another manufacturer’s motor. The motor was tripping out on overload, over-current and under-current. Tests showed that the problems with the motor were caused by its age. It was 30 years old and the bearings were heating up and failing. To solve these problems, Aird Walker & Ralston, Scottish
Water’s electrical consultants, approached ABB authorised value provider, Quantum Controls, and requested an upgrade to an ABB variable-speed drive and matched motor. Quantum supplied a low harmonic drive to avoid introducing harmonics into the electrical network system. Since the new motor and drive were installed the pump has worked smoothly with no interruptions.
ABB
www.abb.com CHEMICAL-FREE DISINFECTION FOR EMERGING PATHOGENS
atg UV Technology has developed a range of UV disinfection units to meet the needs of the food and beverage industry. Waterborne micro-organisms are responsible for adverse effects on flavour, colour, odour and shelf life of products and pose potential health risks to consumers. A
number of emerging pathogens, like Cryptosporidium and Giardia are showing increased resistance to chlorine disinfection. As a result, the food and beverage industry is tightening its already stringent microbiological safety and quality standards for process water, product water and sugar solutions. UV systems from atg UV
Technology are entirely chemical- free, low maintenance and cost- effective and can be used in a range of process applications. Unlike alternative methods of disinfection, UV leaves no contaminating toxins or residues
24 NOVEMBER 2016 | PROCESS & CONTROL
and there is no change to the chemical composition, colour, taste, odour or pH of the fluid being treated.
The success of UV disinfection depends on ensuring that the applied dose is always sufficient to inactivate the target microorganisms. atg’s UV systems closely match the US EPA guidelines for equipment validation. Continuous UV intensity monitoring comes as standard, to ensure that the UV dose is always being delivered.
atg UV Technology
www.atguv.com
the landscape. Haywood said: “As a public
utility, Scottish Water is very focused on its customers and investment in the community. The WPL HiPAF can be installed below-ground, which is a huge benefit to smaller settlements in remote, scenic locations.
WPL
www.wplinternational.com
ADVANCED ACTUATION
The Viseu Sul WWTP in Portugal’s Viseu County is the first in the country to adopt advanced membrane filtration (MBR) wastewater treatment technology. The highly automated treatment facility, serving a population of 90,000, has been named as a national environmental benchmark for future developments.
Centralised process control and
automation at Viseu Sul is facilitated using Profibus DP network technology, utilising Rotork’s multi-turn and part- turn intelligent non-intrusive electric actuators (IQ and IQT respectively) to operate penstocks and butterfly valves for flow control throughout the wastewater treatment process. The Rotork IQ Profibus DP interface card provides control and feedback data about the valve and actuator using DP-VO cyclic communication. Extensive actuator diagnostics and configuration information is included in the DP-V1 acyclic data supported by the card, enabling valve profiling and diagnostic data collected by the IQ actuator to be incorporated into asset management systems. Local technical support for the project was available from Rotork Iberia.
Rotork
www.rotork.com
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