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Emerging Technologies Aeration prepared 2012 Membrane Air Scour Alternatives Objective: Reduce membrane fouling by providing energy efficient air scour fouling control and operational strategies. Description: March 2013 Technology Summary State of Development: Emerging. Several membrane manufacturers have modified operational strategies to reduce air scour fouling control requirements (Wallis-Lage and Levesque 2009), particularly for MBR systems. For example, Kubota varies the volume of air used for aeration based on the flux (e.g., lower air scour rates are used for lower flux values). The manufacturer of the Huber system claims reduced energy consumption for air scour due to a centrally positioned air intake and low pressure. Siemens uses a combination of air and water to scour the membrane (Wallis-Lage and Levesque 2009). General Electric (GE) implemented “cyclic” air scour whereby aeration would turned on and off in 10 second intervals. A newer innovation is their 10/30 Eco-aeration where the membrane is scoured for 10 seconds on, 30 second off during non-peak flow conditions. GE claims that the 10/30 Eco-aeration can reduce energy consumption by up to 50 percent compared to the standard 10/10 aeration protocol (Ginzburg et al. 2008). Comparison to Established Technologies: The literature includes pilot- and full-scale test data for a membrane fouling controller and algorithm used to clean the GE ZENON ZeeWeed MBR. The system uses real-time analysis of the membrane’s filtration operating conditions to determine the fouling mechanism present in the MBR system. The information obtained from the algorithm dictates the implementation of specific control actions to respond to the particular fouling mechanism (e.g., membrane aeration, backwash, chemical cleaning – the biggest impact on energy consumption being membrane aeration). When aeration is identified as the control action, the fouling controller/algorithm provides the MBR Programmable Logic Controller (PLC) system the information to select between the traditional 10/10 (air scour On/Off) protocol and a 10/30 Eco Aeration energy saving protocol. The algorithm was piloted and later full-scale tested at a 3 million gallon per day (mgd) plant in Pooler, Georgia (Ginsburg et al. 2008). Ginzburg (2008) concluded that additional research is required to further develop the on-line fouling controller to include additional control parameters such as membrane aeration flow rate, backwash flow rate, and backwash duration. Available Cost Information: Information not available. Vendor Name(s): Enviroquip (a division of Ovivo, formerly Eimco) - partnership with Kubota Corporation, Japan) 2404 Rutland Drive Austin, TX 78758 Telephone: 512-834-6000 Fax: 512-834-6039 Email: info@enviroquip.com HUBER SE Industriepark Erasbach A1 D-92334 Berching Germany Telephone: +49-8462-201-0 Fax: +49-8462-201-810 Email: info@huber.de Installation(s): Pilot and full scale testing was conducted at a wastewater treatment plant in Pooler, Georgia. See data reference below. 6-14 Wastewater Treatment and In-Plant Wet Weather ManagementPDF Image | Emerging Tech for Wastewater Treatment
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