Siemens Expands Anaerobic Digestion Product Offering


Siemens Water Technologies has acquired the JetMix hydraulic mixing system from Liquid
Dynamics Corp. This proprietary system agitates sludge within the anaerobic digestion
process, optimizing digestion and methane production. The latter can be captured and
used as energy within a wastewater treatment facility. Compared to similar mixing systems,
the JetMix system allows operators to schedule mixing times, which can reduce power
usage by 60% to 80% without decreasing gas production or negatively affecting volatile
solids reduction. Suitable for use in new installations as well as retrofits or upgrades for a
variety of municipal and industrial applications, the JetMix system complements Siemens'
existing line of equipment and solutions for anaerobic digestion.

The JetMix system creates an effective mixing volume rating of 95% or more, even with internal
piping and roof support columns. The system uses powerful jets to maintain or resuspend solids.
Nozzles mounted inside the tank can be rotated 360 degrees to create a flow pattern that virtually
eliminates solids settling, reduces energy requirements, and makes dead spots obsolete. A top
nozzle effectively controls scum and grease as well as foam and other floatables.

The modular design of the JetMix system allows for various pumps and nozzles to be used in
combination to meet a wide range of application requirements and load fluctuations. Viscosity,
particle size, density, settling rate and tank geometry are all considered when designing the mixing
system.

The mixing system can be paired with thermophilic as well as mesophilic digesters, and can be
coupled with heat exchangers. The system can be used in channels as well as in circular, square,
and rectangular tanks. Suitable applications include tanks with gas holders, or fixed and
membrane roofs, with the tanks located either above or below ground. There are more than 300
JetMix system installations around the world.

The Siemens Industry Sector (Erlangen, Germany) is the worldwide leading supplier of environmentally friendly
production, transportation, building and lighting technologies. With integrated automation technologies and
comprehensive industry-specific solutions, Siemens increases the productivity, efficiency and flexibility of its customers in
the fields of industry and infrastructure. The Sector consists of six divisions: Building Technologies, Drive Technologies,
Industry Automation, Industry Solutions, Mobility and Osram. With around 204,000 employees worldwide (September
30), Siemens Industry achieved in fiscal year 2010 total sales of approximately 34.9 billion. http://www.siemens.com/industry

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
29,000 employees worldwide (September 30), Siemens Industry Solutions posted sales of 6.0 billion in fiscal year 2010.
http://www.siemens.com/industry-solutions

Contact USA:

Ms. Karole Colangelo

Corporate Public Relations Manager

Siemens Water Technologies Corp.

Hoffman Estates, IL

847-713-8458 phone

E-mail address karole.colangelo@siemens.com

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