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Directory UMM :Data Elmu:jurnal:A:Aquacultural Engineering:Vol23.Issue1-3.Sept2000:

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Fig. 1. Relationship between oxidation–reduction potential ORP (eH in mV) and effluent ion concentra-tion for nitrate-nitrogen and nitrite-nitrogen (effluent concentration in ppm proportional to the influentnitrate concentration) and sulfide (effluent concentration in ppb).
Fig. 2. An example of a fuzzy membership function for ORP. The horizontal axis represents ORP in mVand the vertical axis represents the membership function of a given ORP in the fuzzy set.
Fig. 3. Example of the way in which fuzzy membership functions for ORP (X) and residence time (RT)are used to control flow through the main pump
Fig. 4. Example of the way in which a membership function for the output of pump rate change (DPR)is determined
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