Use of automated holding systems for initial off-flavor purging of the Rangia Clam, Rangia Cuneata

The brackish water clam, Rangia cuneata, is widely distributed in coastal waters of the Gulf of Mexico. The use of rangia clam as a high value food product remains largely unexploited due to an off-flavor detected occasionally in the steamed product. Initial tests indicate that the substance is closely associated with fatty compounds and will not be removed quickly. Initial engineering system analysis suggests the use of recirculating technology involving fluidized bed and upflow sand biological filters, chemical feed for pH and alkalinity control, UV/ozonation, and foam fractionation, for maintaining critical water quality parameters in the clam holding system. An algal chemostat system integrating controlled air/carbon dioxide ratios, mixing, photoperiod, harvest, and disinfection modes is used to provide a uniform feed. The operation of the clam holding system and the algal chemostat is linked by microcomputer control and all major processes are automated.