The high-performance AS-H Iso-Disc® cloth media filter captures solids to produce reuse-quality filtrate in a continuous operating process. The polishing filter is designed for tertiary filtration and final polishing in municipal and industrial wastewater treatment.
Simple, efficient and flexible solution to your water filtration requirement
- High-quality filtrate with California Title 22 Water Reuse Certification
- Easy to operate with fully automatic filtration and uninterrupted operation during backwashing cycle
- Easy to maintain due to individual filter element monitoring and maintenance
- Small footprint-to-flow ratio - significantly more flow than a sand filter in the same area
The Alfa Laval Iso-Disc® wastewater filter is designed to fit your specific needs flexibly. The wastewater system can be easily expanded. Both square and rectangular cassettes fit within the path of the incoming water and are available to cater different installation configurations. It also allows for individual visual assessment of the effluent flow rate and quality.
Performance of the Iso-Disc cloth media filter is second to none. The pile cloth media allows for complete cleaning during backwash, utilizing filtered water from inside the filter plate. The cloth media is capable of solids capture down to less than 10 microns. The pile cloth media allows for complete cleaning during backwash, utilizing filtered water from inside the filter plate. If required, the cloth media can be replaced and the filter plate re-installed in a matter of minutes, all while the filter continues to function without interruption.
The gravity driven, continuously operating filter uses completely submerged filter media, which gives 100% active filtration area all the time. The outside-to-inside flow through the pile cloth media provides much better depth filtration compared to screens. All internal or submerged components are corrosion-resistant stainless steel or non-metallic materials. For retrofits, the square or rectangular filter plates easily fit into existing basins and require only a low driving force of 30 cm (12 inches) water column.
Produce high-purity filtrate from applications such as tertiary filtration, process streams, surface water treatment and other water reuse as you handle solids and hydraulic loading with a small footprint-to-flow ratio.
How it works
Use of the fixed-filter media design reduces overall horsepower and permits removal of each individual filter plate while the filter remains in operation. During backwash, the filter plates remain fixed while the dynamic, bi-directional, linear backwash manifold serves as a header for removal of solids from the pile cloth media.
At the beginning of the backwash cycle, which is initiated by headloss across the filter, electrically actuated valves segregate the backwash header and clean the filter plates on that portion of the header. This ensures complete cleaning of the filter cloth while minimizing the rate at which backwash water is returned to the treatment facility.
The Iso-Disc cloth media filter can be installed into a concrete structure (supplied by others), pre-fabricated carbon steel with epoxy coating, or stainless steel tanks. You can also easily retrofit existing basins and other sand filter installations to accommodate an Iso-Disc cloth media filter.
A unique advantage is incorporated into the Iso-Disc design that allows filtrate isolation and sampling from each filter plate individually, as well the ability to remove an entire filter plate from the system without filter shutdown. The design also eliminates rotating underwater seals thereby ensuring filtrate quality, while guaranteeing no cross-connection between influent and filtrate, and requiring less maintenance.
Problem solving article: The benefits of replacing your aging tertiary filter with disc technology
Disc filters have become the preferred technology when adding or retrofitting tertiary filtration capacity. They aren’t all created the same. Here’s what you should know when considering your options.
Webinar: Tertiary treatment using the AS-H Iso-Disc filter
Learn how you can ensure the production of high-purity, reuse-quality filtrate from applications such as tertiary filtration, process streams, surface water treatment and other water reuse.
Reclaimed wastewater save City of Meadows nearly $25,000 annually
"This lake changed our community and we are proud of the fact we are using reclaimed water. The success of the Iso-Disc filter has made all of this possible." Mayor Charles Jessup and Utility Director, Dan McGraw
Keeping the Credit River clean
"The Iso-Disc filters are running well operationally and compliance wise, and they have reduced our maintenance significantly." Ashley Barrie, Supervisor, Wastewater Plant Operations, Region of Peel.
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More and more wastewater treatment plants are discovering the benefits of a circular, holistic approach to wastewater treatment. Cost savings, reduced environmental impact and new income streams from recovered resources are but a few. Every wastewater treatment plant is unique and has its own set of challenges and opportunities. With our expertise in processing and our broad range of products, we can support your shift to a circular resource flow. Regardless of whether you are a contractor, designer or plant operator we can help you find the optimum solution for your specific project.
With industry-leading wastewater technology and expertise based on the experience from thousands of installations, we can help analyze your unique situation and select the optimal equipment model, configuration and services for your needs and budget. Get in touch by reaching out directly to the local contact for your area or submitting a general inquiry on the contact form.
Regional Sales Manager - Process Systems
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Regional Sales Manager - Process Systems
Phone: (713) 816-0011
Coverage area: AK, AR, AZ, CA, CO, HI, ID, IL (south), KS, KY, LA, MO, MS, MT, NM, NV, , OK, OR, TN, TX, UT, WA, WY