Membrane Bioreactor targets wastewater applications.

Press Release Summary:

Utilizing mechanical device that supplies irregular pulses of air, MemPulse MBR minimizes energy consumption and optimizes scouring effectiveness. Device introduces air and mixed liquor into bottom of membrane modules through airlift effect. Air bubbles blend with mixed liquor and rise up into membrane fibers, providing effective scouring to membrane surface while refreshing membrane surface to prevent solids concentration polarization.

Original Press Release:

Siemens' Pulsed Air MBR System Decreases Operation Costs and Energy Usage

Siemens Water Technologies' new MemPulse membrane bioreactor (MBR) uses a mechanical device that supplies irregular pulses of air to the MBR module. This decreases operation and maintenance costs, reduces energy consumption, and increases scouring effectiveness. The process can be used with a wide range of municipal and industrial wastewater treatment applications, including water reuse, new housing developments, parks and resorts, and turnkey projects. It can also easily be retrofitted to existing plants wishing to replace conventional clarification processes with membrane separation.

The MemPulse device introduces air and mixed liquor into the bottom of the membrane modules through an "airlift effect." The air bubbles blend with the mixed liquor and rise up into membrane fibers, providing effective scouring to the membrane surface and refreshing the membrane surface to prevent solids concentration polarization. The two-phase cross-flow reduces scour air energy dramatically. No moving parts are added to the system, decreasing operation and maintenance costs. Additionally, there are no mixed liquor jet laterals, which reduces installation time. Rather, the MemPulse MBR device provides even distribution of air and mixed liquor to ensure consistent operating conditions for all of the membrane modules. The MemPulse MBR system will be featured at WEFTEC.08 in Booth # 28077, Hall B. Further information about solutions for water treatment available at

MemPulse is a trademark of Siemens and/or its affiliates in most countries. The Siemens Industry Sector (Erlangen, Germany) is the world's leading supplier of production, transportation and building systems. Integrated hardware and software technologies combined with comprehensive industry-specific solutions enable Siemens to enhance the productivity and efficiency of its customers in industry and infrastructure. The Sector comprises six Divisions: Building Technologies, Industry Automation, Industry Solutions, Mobility, Drive Technologies and Osram. In fiscal 2007 (ended September 30), Siemens Industry generated sales of approximately EUR40 billion (pro forma, unconsolidated) with around 209,000 employees worldwide. With the business activities of Siemens VAI Metal Technologies, (Linz, Austria), Siemens Water Technologies (Warrendale, Pa., U.S.A.), and Industry Technologies, (Erlangen, Germany), the Siemens Industry Solutions Division (Erlangen, Germany) is one of the world's leading solution and service providers for industrial and infrastructure facilities. Using its own products, systems and process technologies, Industry Solutions develops and builds plants for end customers, commissions them and provides support during their entire life cycle.

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