A full-scale plant for the recovery of struvite from calf manure has been installed at a calf manure treatment facility at Putten (the Netherlands), and is in the final stages of testing. If successful, all 4 calf manure treatment facilities, with a combined annual volume of appr. 700 000 tons of calf manure, will be fitted with the same technology. The aims of struvite recovery are twofold; reduction of sludge volume, recovery of struvite. Some potential uses of struvite are briefly discussed.
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Schuiling et al. (1999) studied this question.