AERZEN provides energy efficient process air generation in the Kötz wastewater treatment plant Stronger in combination For process air generation, the Kötz wastewater treatment plant selected an ideal solution: the compound system of AERZEN turbo compressors for base load, and AERZEN positive displacement blowers, or rotary lobe compressors, for peak load, to provide failure-free supply of the biological wastewater treatment plant at optimal cost. View over aeration basins 1 and 2 onto the allocated oxygen station. Oxygen station for supply of aeration basins 3 to 6, equipped with two AERZEN positive displacement blowers with air bearings, installed in the year 2000. Hans Kempfle, sewage work operator in Kötz: "Due to their high reliability and low maintenance costs we absolutely recommend AERZEN positive displacement blowers and turbo compressors." Surface of aeration basin 3. The oxygen bubbles on the surface are clearly visible. Two AERZEN positive displacement blowers have aerated the sand collector since the year 2000. The Kötz wastewater treatment plant, located a few kilometres south of Günzburg, was designed for a population equivalent of 45,000. About 20,000 inhabitants are connected at present. Due to the additional discharge of industrial wastewater, the average daily load corresponds to a population equivalent of about 35,000. The wastewater treatment plant works according to the mechanical-biological principle. In the two stage nitrification process, the wastewater, which is mechanically precleaned by a sand collector, is supplied with oxygen, to assist the action, and reproduction, of the bacteria which are required for wastewater purification. In the activated sludge basin, the activated sludge sinks to the bottom, and the cleaned clear water, with a CSB degree of purification of 96 per cent, is then fed into the adjacent River Günz. Tailor-made solutions Sewage plant operator Hans Kempfle has experience with process air generation by turbo compressors as well as by positive displacement blowers, as both systems are in operation in Kötz. In the current equipment configuration, two AERZEN positive displacement blowers, with a maximum intake volume flow of 2,370 Nm³/h and 35 kWmotor, have supplied one part of the aeration basins with oxygen since the year 2000. Since 2009, two AERZEN turbo compressors type AT 50-0,6S, equipped with air bearings with maximum intake volume flow of 2,187 Nm³/h and 37 kW motor, have been supplying the other. Furthermore, since 2000, two small positive displacement blowers have supplied oxygen for the sand collector aeration. The units were installed in separate buildings in close proximity to the aeration basins which they support. This compound system offers the operator two key advantages: for each loading situation, even where process air requirements can fluctuate considerably, it ensures an optimally adapted and safe process air supply, and makes particularly energy efficient generation possible. This is significant because energy consumption involved in process air generation at a wastewater treatment plant can amount to up to 80 per cent of total costs. New dimensions in terms of energy efficiency Due to the compound concept, the energy efficiency of the process air generation achieves excellent results, as it is possible to respond with great precision to varying requirements. Furthermore, up to now the units have been failure- free and require very little maintenance. Comparing the investment and maintenance costs, even with a long-term consideration of both systems, Kempfle assumes a balanced cost-ratio, as the lower procurement price of positive displacement blowers, plus their ongoing maintenance costs, roughly corresponds with the higher investment costs of turbo blowers. Therefore, he absolutely recommends both air-bearing AERZEN turbo blowers as well as AERZEN positive displacement blowers for generation of process air in wastewater treatment plants. The process air requirements of a sewage plant, whether operated locally or industrially, can only be achieved efficiently when different machine types are combined. This has been proved by cost-effectiveness calculations undertaken by various engineering concerns.
AERZEN Thailand founded With the recently opened subsidiary in Thailand’s capital Bangkok, AERZEN is now present in the “Land of Smiles”. Since 3rd December 2014, Mrs. Jittarat Maneewan, who already knows our products very well, has been working as Business Development Manager for Thailand. In her role, she reports directly to Mr. Andy Lim, AERZEN Singapore, General Manager for South East Asia. Opening a new office in Thailand is part of the AERZEN service strategy to always be close to our customers and to be able to support them directly. The co-operation with the present sales partner, Uni Royal International, will continue - in particular in the After Sales range.
Laser-based coupling alignment – efficient and precise Machines that are optimally aligned have lower operating and maintenance costs. Thanks to precise alignment, the “Mean Time Between Failure” is reduced and machine availability is increased.For this reason, AERZEN applies across the group the laser-based alignment system OPTALIGN smart RS5 AERZEN. This enables the alignment of directly driven machines. The customer benefits are obvious: lower-wear operation, increased machine availability and prevention of production failures. Using this approach, AERZEN expands its service competence. For any questions, just contact our service managers on site, or our specialists in our parent company.
AERZEN further expands its range of compressors AERZEN has expanded the new Delta Screw E compressor-series to a total of six different sizes: the new models VM 30 and VML 35 cover the lower volume flow range of 330 to 2,590 m³/h and thus supplement the belt-driven packaged unit types. The VM- and VML compressors, with a maximum differential pressure of 2 or 3.5 bar, are optionally equipped with pressure retaining valves, overflow regulators and air-toair aftercoolers, and include cyclone separators and an automatic condensate drain. Specially tailored solutions are also possible.
New concept for service and maintenance trade fairs AERZEN has developed a new, modular fair stand concept which can easily be adapted to various base areas, and which reflects the new Corporate Identity. The freestanding, portal-like beam construction of this fair stand is designed to attract the attention of visitors from some distance. Therefore, an adequate presentation area is now available for products and services of the AERZEN After Sales Service. We celebrated its debut at this year’s “Maintenance” fair from 25-26 February in Dortmund, Germany.
Automatic re-lubrication devices Packaged units with high annual operating times may require more service calls for the re-lubrication interval of the electric motors. Therefore, AERZEN has included automatic re-lubrication devices in the After Sales Service Programme. These systems are driven by electric motors; the dispensers are provided with the necessary power supply by an integrated removable battery. Cartridges are available in three different sizes and various types of lubrication. The devices can be applied at temperatures from - 10 °C to + 60 °C. Thanks to corresponding programming, the dispensed quantity can be accurately dosed and adjusted to the requirements of the electric motor. Therefore, an efficient and safe lubrication without downtime is guaranteed. In this way it can be ensured that the system is permanently available. Retro-fitting of new AERZEN machine lubrication devices is also possible for existing standard motors.
Aerzen do Brasil celebrated its 15th anniversary Last year, the team at our subsidiary Aerzen do Brasil celebrated its 15th anniversary: to have been in business successfully for 15 years in the important, but highly competitive Brazilian market, is a great achievement. To celebrate this milestone, all Aerzen do Brasil colleagues, and their families, were invited to a celebration “in the green”.
