Clean Water Lab

    In Phase 2 we will construct a pollution-free clean water protected area of approximately 1,000 square feet under the walkway.  Within this clean water Laboratory, we will measure Fecal, TSS, BOD, Ph, TRC, Nitrate (total), Phosphorous (total), Salinity and , hopefully, Vibrio, if funds permit, and then compare these results with samples taken adjacent to, but outside the clean water area.

     The clean water protected area will be surrounded by a special filter which has properties similar to an extended aeration sewer plant, only more so.  The filter, while letting water through, will block or reduce the passage of various bacterium including Fecal and Vibrio, TSS, Nitrates, Phosporus, TRC and BOD while cleaning itself.  The filter should, under normal use, last approximately five years.  One of the areas of study will be how different flow rates and other area characteristics affect the operation properties of the filter's memebrane.  The specially designed membrane is formed by the use of may loops of Binylon and Polypropyene thread and is presently made in Asia.

     When the fiter is submerged in water, microbes are attracted to the threads and multiply there to decompose organic matter usually found in a sewer plant of polluted rivers.  The principle of the filter is based on the fact that swimming microbes become negatively charged by picking up free (static) electrons as they move.  The filter membrane does not move and therefore picks up little charge and is in effect grounded or positively charged.  As a result, the microbes are attracted to and held by the threads.  Bacteria are divided into two types,(oxygen) aerobic and (non-oxygen)anaerobic.  The intricate membranes construction prevents dissolved oxygen from reaching the center of the membrane.  Thus, the anaerobic gravitates to the center of the membrane while the aerobic multiply in the outer surface of the membrane.  The membrane provides a culture chamber for a wide spectrum of microbes including bacteria, protozoan and algae.  The proliferating microbes efficiently treat the sewage of pollution and insure a high quality of treated water and a great reduction in BOD, nitrates and TSS.  The anaerobes consume  excreta of the aerobes and give off NH4 as a bi-product which in water, converts to NH3 , so the system becomes a balance food chain in itself and produces less excess sludge than other systems.  The resulted fiter should provide a clean water area for our oyster system nursery, Phase 3.  With DEP's permission we intend to place sludge,BOD,TSS, and chlorine reducing filters in a sewer plant under our control. The claims in the manufacture literature and various filter size and shapes will then be evaluated.   

       See the page under 'oyster farming' for more details on the filter uses.

       See  the page under 'seagrasses' for more detail on Bio-film uses

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THE KEOHANE SCHOOL OF MARINE & ENVIRONMENTAL STUDIES Inc.

 

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Fort Myers, Fl., 33908

 

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