Water Journal : Water Journal June 2015
June 2015 water 99 water Business KAESER EXPANDS ITS RANGE OF ENERGY- SAVING LOW-PRESSURE SCREW BLOWERS Following the successful 2014 market launch of the highly efficient EBS series screw blowers featuring Sigma Profile rotors, Kaeser has launched the FBS series of screw blowers, which provide free air deliveries up to 67m3/min. Launched at Hannover Fair 2015, the new FBS series of screw blowers provide a low-pressure compressor solution that is remarkably quiet, yet highly efficient. In fact, the FBS series screw blowers are up to 35% more efficient than conventional rotary blowers, outclassing other comparable screw and turbo blowers on the market. Such significant energy savings are realised thanks to the inclusion of the same proven and trusted technology inherent in the standard Kaeser compressor range. The rotors found in the EBS and FBS series screw blowers are uncoated, ensuring that the user can enjoy outstanding efficiency, year after year. The data provided for the effective total energy consumption and usable flow capacity correspond precisely to the machines’ actual performance (as per the conservative tolerances outlined by Standard ISO 1217; measurements validated by TÜV-Süd). This ensures that the estimated savings calculated as a result of investing in this piece of equipment are actually realised. All EBS and FBS series screw blowers from Kaeser feature an integrated Sigma Control 2 controller. This provides continuous and comprehensive monitoring while allowing straightforward connection of each machine to communications networks. For users requiring further productivity and energy savings capabilities, the Sigma Air Manager (SAM) master controller can be introduced. SAM features further refined software specialised for blower operations. Applications such as wastewater treatment, pneumatic conveying systems and power generation can all benefit from this innovative screw blower technology. Made in Germany, the EBS and FBS series screw blowers possess numerous other outstanding qualities that Kaeser products are renowned for. This includes an internal cooling system that makes the energy-intensive use of oil pumps and oil coolers redundant. Further, they feature a highly effective sealing concept that ensures long-term seal integrity without the need for vacuum pumps. The durability and reliability of these machines is also enhanced by eliminating the need for auxiliary equipment and circulating oil lubrication. Cooling and process air are drawn in separately from outside the machine enclosure, which not only provides greater usable air mass flow for the same power consumption, but also ensures optimum cooling and efficiency. Thanks to a clever component layout, these units can easily be installed directly next to a wall, or side-by-side, additionally making maintenance easy. The durable EBS/FBS series screw blowers from Kaeser have been designed for dependable and continuous operation and are available with free air deliveries from 10 to 67m3/min, maximum differential pressure 1.1 bar. For more information please visit www.kaeser.com.au or phone 1800 640 611. SEWER ODOUR MANAGEMENT WITH PASSIVE BED CARBON FILTERS Sewer operators require a low-cost and reliable way to treat odorous air released from the daily operation of sewer networks. Air released from pump stations, air release valves and manholes can have an objectionable odour and result in public complaints. The rate of odour formation and release can be variable, making its prediction and subsequent treatment difficult. Passive bed carbon filters – carbon beds without a fan – can offer a low-cost, simple and reliable odour management solution. The main odorous compound in air released from sewers is H2S (hydrogen sulphide), which is formed as wastewater ages and becomes anaerobic. With sewer networks continually expanding to capture wastewater from more and more residences, such as semi-rural areas, coastal communities, holiday homes and similar, wastewater age is increasing and so are H2S odours. A passive bed carbon filter is one solution. Air released from a sewer is forced to pass through a bed of activated carbon, which adsorbs and eliminates the odorous compounds from the air before it is released to the atmosphere. All alternative air paths such as electrical conduits and access hatches must be sealed. Once the carbon is saturated with the odorous compounds it is removed for disposal and new carbon is installed in the bed. Passive bed carbon filters need no fan, heater or other moving parts, and require no power. Only a small footprint is needed and there is nothing to regularly service and maintain. The ‘Green Dome Odour Filter’ (GDOF) by Armatec Environmental Ltd (distributed in Australia by Xylem), is a passive carbon bed with additional features to ensure reliable and acceptable performance. With a GDOF, the carbon bed is installed partly below ground, and a dipstick is provided to monitor the degree of carbon usage. The GDOF has the air inlet duct and carbon bed below ground level, so it can be sited close to the air release point but at a location out of the way of roads, footpaths and service crews. The only part of the installation that is seen above ground is the ‘Green Dome’, which is removed to access the carbon bed. The first installations of GDOFs were on two pump stations at a coastal holiday community of Mangawhai in New Zealand.
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