Abstract
Fluidized bed crystallizers (FBCs), also called pelletizers or pellet reactors, are an attractive alternative to conventional water softening. FBCs produce a coarse, spherically grained, easily dewatered, calcitic sand as the waste product, rather than a gelatinous sludge. Two operating full‐scale municipal FBCs used for softening in southern Florida were sampled and characterized. The study concludes that: (1) Calcium removal is very rapid within the reactor, leaving a large portion of the bed unused at any one time; (2) the calcium removal rate can be described by the Reddy‐Nancollas crystallization model; (3) high supersaturation levels due to poor mixing at the point of chemical mixing promotes microfloc production and solids carryover in the effluent; (4) classification of the pellets within the fluidized bed does not occur; (5) the sampling techniques appear to be adequate for characterizing FBC reactors; and (6) operation of FBCs would be aided by the installation of a pressure gauge on the FBC inf...
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Disclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.