Water / Wastewater Treatment


system is now used for additional visitor attractions and the garden demonstrates and explains the new system as a part of the visitor experience.


Prince Charles – patron of the organisation – praised the garden’s environmental focus on a visit in September 2010. He commented on the need to “leave a legacy for future generations of a sustainable environment.”


The key to the future


In recent years, increasingly stringent regulations regarding water quality have been put in place. Several EU directives including the Groundwater Directive, Urban Wastewater Treatment Directive (UWWTD) and, ultimately, the Water Framework Directive (WFD), govern the way in which wastewater should be managed in the UK. These directives provide a framework for the protection and improvement of water bodies.


The Water Framework Directive focuses on preventing pollution incidents rather than clearing up pollution following incidents to protect and enhance the quality of their water bodies. All water bodies should meet or exceed ‘good’ ecological and chemical status by 2015 under the WFD.


Previously it was acceptable to discharge water containing higher concentrations of ammonia and other contaminants into the environment however the directive will tighten the tolerances of these effluent discharges. Many existing treatment systems are unable to achieve these consent limits and so require modification to comply with regulations.


“The new FBA™ technology is capable of treating many of these higher strength pollutants and solves the problem of upgrading old systems to comply with new regulations,” says Tori Sellers.


Case Study 2: FBA™ treating wastewater


Sustainability, in terms of environmental performance, is very important to the National Botanic Garden of Wales.


Tori Sellers, director at ARM Reed Beds, explains: “The National Botanic Garden of Wales came to us last year with a challenge: upgrade their existing wastewater treatment system – an eleven-year-old Living Machine® costs.


and aeration tanks – to handle increased visitor numbers while saving energy and


“Over the summer, a sensitive refurbishment programme was initiated which included the implementation of state-of-the-art FBA™ technology within the reed beds and the removal of the Living Machine and aeration tanks. The new system now takes up a far smaller physical footprint, has a bigger treatment capacity and will save the garden around £7,000 in energy and maintenance costs every year,” says Tori Sellers.


The project was completed in autumn 2010 and comprises a septic tank which feeds into a 128m² vertical flow reed bed system with FBA™ technology. The greenhouse that used to house the previous


“All businesses whose activity directly or indirectly affects the water environment are being affected by this directive. They apply to the collection of water on hard-standings - such as car parks and airports - which may mix with de-icer or fuel spillages to create contaminated surface water run-off. By exploring their wastewater management from a sustainability perspective, many businesses will find side-effect operational and financial efficiencies.


“Water companies have to invest heavily to comply with the requirements of the Water Framework Directive. These improvements mainly focus on building and improving treatment works.


“Another incentive for considering FBA™ systems is their low running costs,” says Tori Sellers. “In an economic climate where energy costs are increasing and many companies are struggling to drive costs down, FBA™ can save companies significant sums of money. When compared with alternative wastewater treatment systems, reed beds offer much lower energy costs and require much less maintenance.


“Where climate change is an increasing threat and competition even hotter, every business is considering ways to carve competitive edge by demonstrating their corporate responsibility credentials. Reed beds offer a commercially-astute, wastewater, treatment solution and are undoubtedly far more attractive than conventional systems into the bargain!”


New Flow Meter Combines Ease of Hot Tap Installation and Accurate Measurement of Full Flow


McCrometer (USA) introduces the FPI MagTM (Full Profile Insertion)


Electromagnetic Flow Meter. The new FPI Mag is the successor to McCrometer’s popular Multi-Mag Insertion Flow Meter, which is the industry’s only multi-electrode hot tap full profile insertion flow meter delivering a continuous total flow profile similar to a full-bore mag meter.


The enhanced design of the new Full Profile Insertion Flow Meter features additional sensing electrodes for increased sensitivity and is now packaged in a heavy-duty 316 stainless steel sensor body for maximum structural integrity. The sensor is coated with a NSF certified 3M fusion- bonded epoxy coating for operational longevity.


The FPI Mag with hot tap installation addresses the ever increasing need for municipalities to provide uninterrupted service 24/7, but at the same time improves process control and ensures delivery accountability. The Full Profile Insertion Flow Meter from McCrometer installs without interrupting service, de-watering lines, cutting pipe or welding flanges. Installation costs are reduced by eliminating the need for heavy equipment or extensive manpower. The FPI Mag is the industry’s most economical flow metering solution for medium and large line sizes, reducing installed costs by more than 45 percent.


The FPI Mag meter’s compact insertion design fits in confined spaces with limited access and offers total accessibility. The flow meter can be removed in pipes under pressure for easy inspection, cleaning, calibrating or


verification with McCrometer’s own NIST traceable Calibration Lab. It is particularly cost-effective for retrofit applications replacing flow meters or in sites never metered before.


Unlike all other insertion mag meters, the FPI Mag Flow Meter’s multi-electrode sensor design compensates for variable flow profiles, including swirl, turbulence and low-flow conditions. Multiple electrodes placed across the entire sensor body continuously measure and report the average flow rate over the full diameter of pipe.


The Full Profile Insertion Flow Meter is available for line sizes from 4 to 138 inches and rivals the performance of a full bore electromagnetic flow meter. With highly stable measurement, the FPI Mag features accuracy of ±1% of reading ± 0.03 ft./sec zero stability from 0.3 to 20 ft/s velocity range. The flow sensor comes pre-calibrated from McCrometer’s NIST traceable Calibration Lab and requires no recalibration in the field.


With no moving parts and a single-piece design, the FPI Mag’s multi-electrode sensor contains nothing to wear or break, and it is generally immune to clogging by sand, grit or other debris. The FPI Mag supports liquid flow measurement requirements in municipal water and effluent wastewater treatment. Typical municipal water applications include: wells, booster stations, effluent, filter balancing and backwash, pumping stations, UV dosing and potable water distribution.


Reader Reply Card No 31 UV Effluent Disinfection


UVO3 Ltd are specialists in UV disinfection and water treatment.


UV is an environmentally friendly way to treat effluent discharges and is accepted by the EA. It is an increasingly popular waste water disinfection method.


Our modular 3G units have several inherent advantages over other disinfection techniques:


- No Moving Parts - Low Energy Requirements - No Chemical Consumption - Short Contact Time - Low Pressure Drop - Easy to Install and Maintain - Ideal for Remote/Unmanned Operation


Suitable for installation after new or existing effluent treatment plants.


UVO3 Ltd Tel: +44 (0)1480 355446 Web: www.uvo3.co.uk


Fax: +44 (0)1480 353487 E-mail: sales@uvo3.co.uk Reader Reply Card No 32


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www.pollutionsolutions-online.com • February / March 2011


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