WET News

JULY 2015 WET NEWS 19 Specifiers file: Andritz Sludge dewatering equipment www.andritz.com Andritz manufactures, supplies and installs a wide range of sludge dewatering equipment for the municipal, industrial and environmental sectors. Products include centrifuges, filter presses, screens and thickeners. Bioclere Technology International Bioclere Technology International Sludge dewatering www.bioclere.co.uk The company designs, fabricates and installs package wastewater treatment systems and containerised systems, incorporating Bioclere enclosed biofilter and submerged aerated biofilter technologies. Its products also covers sludge dewatering and thickening with Draimad sack filters and Monobelt belt press. Euroby Environmental waste processing www.euroby.com The company's activities include providing a comprehensive service to deal with all sludge-related problems involving thickening, dewatering, drying and stabilisation / pathogen kill from sewage to chemicals, pharmaceuticals and foods Haigh Engineering Sewage and wastewater treatment www.haighinletworks.com Haigh Engineering manufactures a range of sewage and wastewater treatment equipment that includes inlet screens, screening handling and conditioning, dewatering, compaction and drying. It also produces macerators for use with pumps as pump protection, or built in to macipumps or pipelines. Latham International Solid / liquid separation www.lathaminternational.com Latham offers a wide range of equipment from filter presses, centrifuges, filtration equipment to dewatering equipment and effluent water treatment systems. Specialist areas include sludge dewatering, sludge handling and effluent treatment; centrifuge technology; and filter belts. Markland Specialty Engineering Sludge detection www.sludgecontrols.com Markland designs and manufactures ultrasonic and optical instrumentation that helps municipal / industrial plants measure, monitor and automate control of water and wastewater treatment and process slurries. Products include the Sludge Gun handheld detector, automatic sludge blanket level detectors, and suspended solids density meters. Micronics Filtration Dewatering solutions www.micronicsinc.com Micronics offers process, mechanical and electrical design, supply and project management of equipment supply, hire, service, upgrades, maintenance and refurbishment of filter presses, technical filter cloth media, filter plates and filter belts. MSE Hiller Dewatering centrifuges www.mandse.com MSE Hiller specialises in the rental and sales of dewatering centrifuges into environmental applications within the water treatment and process industries. Its range of decanter-type centrifuges offer high performance sludge dewatering and thickening and there are more than 5,600 units installed worldwide. Sludge Blanket UK Detection www.sludgeblanketUK.com The company's Sludge Tracker is designed for superior sludge level detection in a wide range of water and wastewater applications. A high frequency sound pulse is transmitted down into a tank. The pulse is reflected back from the top of the blanket and the time taken for the reflection to return to the sensor is converted into the distance to the blanket. Spirac Sludge handling solutions www.spirac.co.uk The company specialises in screening, grit and sludge handling solutions. Products include shaftless conveyors, screens, dewaterers, washers, grit handling, inlet works packages, as well as storage and receival A solution: Sludge interface measurement – its time has come Pulsar's Sludge Finder 2 has enabled Severn Trent Water to maintain a 'healthy' level of sludge. N ew microprocessor power has allowed acoustic engineering experts to develop more effective echo processing algorithms that can detect and distinguish between ever more difficult targets. It is this sophistication that has allowed devices like Pulsar's Sludge Finder 2 to be developed. There are key operations in wastewater treatment that can now be addressed. For example, with accurate and reliable sludge blanket detection in final settlement at its major Barnhurst STW near Wolverhampton, Severn Trent Water has been able to automate the final treatment process. This has aided compliance and reduced the number of out-of-hours call-outs. The Barnhurst site uses 14 Pulsar Sludge Finder 2 units, with radio communication back to the control cabin, that are used to adjust the bellmouth valves on site. This controls the process to maintain a 'healthy' level of sludge, and only to call for an operator if a fault is identified, significantly reducing staff visits to site. Site compliance In final treatment, the sludge concentration is very low, and it is a real testament to the reliability of the new equipment that Severn Trent Water has been able to entrust such a key element of site compliance to an automated system. The ability to control sludge concentration has other benefits too. At Severn Trent Water's Stoke Bardolph site, sludge blanket measurement is used to help the increase sludge concentration from 2% to 6%. Sludge is then further processed in the digesters to help power the onsite turbines, so much so that the site is now self-sufficient in energy, and returns power to the national grid, generating 5.5MW at full power. The principle of operation is the same as in ultrasonic level measurement, in that an acoustic signal is generated by a piezo-electric transducer and At Severn Trent's Stoke Bardolph site, sludge blanket measurement has increased sludge concentration from 2% to 6% The Pulsar Sludge Finder 2 control unit is pre-programmed with the key applications, such as primary settlement, final settlement or SBR bounced off an interface level. The time taken for it to return to the transducer face is measured and, knowing the speed of sound in water, a distance is calculated. As mentioned above, the major step forward has been the development of echo processing soŽware that allows the system to accurately identify the correct interface level, ignoring competing signals from stanchions, the base of the settlement tank, for instance. Another key element has been the development of transducers that operate at the very specific frequencies that maximise signal reflection from the interface level. Approach Pulsar has been careful to carry over another important feature from the world of ultrasonic level measurement, ease of set-up. The control unit has, pre-programmed, the key applications such as primary settlement, final settlement or SBR, with the processing parameters 'tuned' for optimum performance within a specific application. This approach simplifies set-up considerably, and allows each site to take advantage of experience gained through thousands of hours of testing and use. Reliable sludge blanket detection and measurement is rapidly becoming an accepted part of the armoury of the wastewater instrument engineer, aiding compliance and reducing energy and operating costs throughout the network. With the focus on totex and compliance within AMP6, technologies like reliable sludge blanket detection will develop and grow in importance. Search for suppliers at wwtonline.co.uk The kit: Sludge belt dryers Huber Technology www.huber.co.uk Huber Technology is supplying one of its BT16 Sludge Belt Dryers to Meary Veg Waste Water Treatment Works on the Isle of Man. The existing dryer is being replaced because it is approaching the end of its useful life, and does not have capacity post 2016 to treat the sludge being generated island-wide. The Huber BT Sludge Dryer will Screw compressor and blower Gardner Denver www.gardnerdenver.com Gardner Denver has launched its new Robuschi Robox Screw compressor and blower package for the wastewater treatment industry; designed to save customers up to 30% on their energy consumption. The new Robuschi Robox Screw package is available in high (up to 2.5 bar) and low pressure (1 bar) configurations. It offers a range of innovative features to provide a robust yet simple construction that delivers high performance in aggressive environments such as water purification, effluent treatment and biogas applications. At the core of the new package is the RSW compressor, which has been purpose-designed for longevity and performance. The unit's oil-free design provides clean air to the process, to avoid the risk of oil contamination in the water provide several benefits including compact footprint, lower energy usage and reduced manpower and maintenance. The robust BT Belt Dryer will have the capacity to treat supply or adversely affecting the biodegrading process. It provides the maximum airflow, up to 10,500m3/h to deliver a consistent supply of air to the application. all the island's sludge until at least 2033, allowing the progression of the Regional Sewage Treatment Strategy (RSTS) programme to improve the marine environment around the Isle of Man. The resulting sludge pellets will go into the Energy from Waste plant, to produce electricity. Installation of the technology will be carried out by Newtonabbey, Northern Ireland company Williams Industrial Services.

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