Improved operational reliability and contaminant removal in water reuse through filter upgrades. Issue 5 (14th October 2021)

• Record Type: Journal Article
• Authors: Stanford, Benjamin D.; Arrington, D. Albrey; Raseman, William J.; Becker, William C.
• Is Part Of: AWWA water science. Volume 3:Issue 5(2021)
• Page Start: n/a
• Page End: n/a
• Publication Date: 2021-10-14
• Subjects: filtration -- pathogens -- trace organic contaminants -- water reuse; Water -- Analysis -- Periodicals; Water-supply engineering -- Periodicals; Water -- Social aspects -- Periodicals; Water -- Purification -- Periodicals; Water-supply engineering; Water -- Social aspects; Water -- Analysis; Electronic journals; Periodicals; 628.162
• DOI: 10.1002/aws2.1253
• Languages: English
• ISSNs: 2577-8161

Abstract

Abstract: A redesign, construction, and replacement of the filters used for water reuse at a 11 million gallon per day Florida municipal water reclamation facility provided a prime opportunity to evaluate the impact of the filtration technologies on water quality, trace organic contaminant (TOrC) removal, and removal of pathogens. This study was designed to capture operational data, pathogen removal ( Cryptosporidium and Giardia ), and TOrC removal before the replacement of the filters using the existing synthetic media filters (SMF) and traveling bridge filters (TBF) followed by an evaluation of the deep bed filters (DBF) after construction and commissioning. The new DBF units provided substantially improved control of turbidity and total suspended solids while also significantly improving the removal of Giardia cysts (increase of >2 log removal) as compared to removal across the older SMF and TBF units and minor improvements to Cryptosporidium oocyst removal. TOrC removal was not significantly changed when comparing removal across the SMF, TBF, and DBF units nor post chlorination (chloramination). Article Impact Statement: This manuscript will be of use to the community as it provides additional understanding of public health protection in water reuse.