Poland produces approximately 1 million tons of biosolids per year – a little more than a third of which is municipal. Almost half of that is currently sent to landfill. With both biosolids volume and landfill costs expected to increase significantly over the next few years, alternative disposal methods such as incineration and drying are becoming of growing interest.
Some advantages to using the Ecoflash dryer include high energy efficiency; minimal environmental impact; and flexible, simple, and safe operation. Picture: Siemens AG
The Siemens Ecoflash thin layer dryer is designed to dry biosolids using either diathermic oil or saturated steam. Inside the drying chamber, a rotor equipped with adjustable pitch blades operates at high speed. The wet biosolids are fed into the drying chamber by a dosing unit (metering pump) and centrifuged by the rotor, into a thin film layer, on the drying chamber wall. The blades of the rotor move the biosolids through the process in a dynamic and turbulent action, creating an energy-efficient evaporation process. A counter current of air removes the evaporated water from the dryer and helps to cool the dried biosolids prior to them being discharged.
The Siemens’ thermal drying system was selected because of the technology’s high reliability and safety, small footprint, low maintenance, and minimal operator attention required. Additionally, integrated energy recovery makes the thermal energy requirement particularly low. Other advantages include high energy efficiency; minimal environmental impact; short product retention time and agriculture-grade pathogen reduction.
Ecoflash is a trademark of Siemens and/or its affiliates in some countries.Contact USA:
The Siemens Industry Solutions Division (Erlangen, Germany) is one of the world's leading solution and service providers for industrial and infrastructure facilities comprising the business activities of Siemens VAI Metals Technologies, Water Technologies and Industrial Technologies. Activities include engineering and installation, operation and service for the entire life cycle. A wide-ranging portfolio of environmental solutions helps industrial companies to use energy, water and equipment efficiently, reduce emissions and comply with environmental guidelines. With around 31,000 employees worldwide (September 30), Siemens Industry Solutions posted sales of €6.8 billion in fiscal year 2009.
Further information and downloads at: http://www.siemens.com/industry-solutions
Stefanie Schiller | Siemens Industry
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