Blosed recirculating systems (RASs) are being developed as sustainable alternatives for the inland farming of marine fish because their fully controlled operations conserve water, reduce the generation of effluents and minimize their environmental impact. However, solid waste disposal, principally of fish feces and uneaten feed, can be a problem.New, more stringent waste disposal regulations have stimulated the aquaculture industry to include solid waste treatment into their operations, which in freshwater systems typically use conventional flocculation/coagulation processes to reduce sludge volume prior to composting for disposal on land.
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