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The results obtained using an expert system to control an activated sludge process involving nutrient removal are reported. The study was conducted at a pilot plant using an Anaerobic/Anoxic/Oxic (A 2 /O) scheme for which a distributed control system was specially developed. The system allows various expert operational approaches to be developed with a view to minimize nitrogen levels in the...
According to the literature, from the porcellanid crab A. spinifrons only the juveniles are commensals of sea stars and anemones. In order to revise this situation, a total of 500 host individuals were sampled in the intertidal zone of the Coquimbo Peninsula (200 individuals each of the sea-anemones Phymactis clematis and Phymanthea pluvia, and 100 of the sea star Heliaster helianthus). Results...
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