Dr. Caliskaner was the project manager and principal investigator of the tertiary filtration pilot and evaluation project to assess the performance of the Fuzzy Filter depth filtration technology employing a new type of compressible filtration media to receive Title 22 (unrestricted reuse) approval from the California Division of Drinking Water (CDDW). The pilot study was conducted at the City of Roseville’s Pleasant Grove WWTP in 2010. The filter known as the “Fuzzy Filter” was provided by Schreiber, LLC.
The new compressible filter medium is made of polyphenylene sulphide synthetic fiber material. The ability to compress the filter medium is a significant factor in the operation and performance of filter, as all of the medium characteristics (i.e., medium depth, porosity, and medium effective collector size) can be adjusted in response to the changing influent conditions and desired effluent quality.
The new compressible medium filter was effective up to a filtration rate of 40 gpm/ft2, which is a significantly higher rate compared to the conventional granular medium filtration technologies (e.g., 5 to 10 gpm/ft2) reducing the footprint and capital cost requirements.
Based on pilot filtration and evaluation results, CDDW approved the use of Fuzzy Filter compressible medium filtration technology for Title 22 unrestricted reuse applications at hydraulic loading rates up to 40 gal/min-ft2 (highest filtration rate approved).