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<br /> rrinking4� "+ "� 4-lnlg� to a
<br /> vt T' `}6iA ghat- i very m an and we can coil
<br /> y.;the, o nt o recirculation. I f u take- the highly nitrof led
<br /> certai�� � re � .. � �
<br /> waste and. nitrate.. Brom the effluent. of the plant send it back into the anaerobic
<br /> portion o '. the plant you get more dnitrofication and so we can balance the nitrate
<br /> removal -to meet the needs without going to complete denitrofication, o go to com-
<br /> plete dein trof cat on ve can get it down to one or two but that's, a tremendous
<br /> cost factor, arid- " .' ` atremendous operation adn you can it down to the drinking
<br /> water standards._without doing let. Mr. Buckingham, said that that what the
<br /> Board i s looking forand he thought that perhaps Mr. Dobi6 could appreciate that. as
<br /> well as-th Beard,nth the type of water supply that we have on the Cape and this
<br /> proliferation of large pro,iects comm under one unit, it's the best way I can
<br /> think of it it has us all c n erred. Mr. Dobi e p" Well what you t re doing is if {.
<br /> you take, your s sme development.with septic tanks and leeching fields and put this
<br /> in with this treatment plant you will be putting in only about 3% of the organic.
<br /> l ol.ut .nts, you' will be getting about removed, of the organic polutants, the
<br /> so-called BOD and COD of the waste and we will be obtaining almut educt.ion o
<br /> the total -nitrogen. If you go to Sea Crest you will see the effluents going into
<br /> the treatment plant the same thi ng that goes into a le e cb ing field .i f you look at
<br /> that and then look at the effluent going out there's tremendous if`�' r~ence.'.'
<br /> Mrs. Anderson asked how often testing is done at the plant, Mr. Dobe said the
<br /> State is. in their guidelines the regulations, testing monthly at least, certain
<br /> tests will be done monthly,, dertai n tests will be dome daily. Basically, ghat
<br /> the guidelines spay is that'.the consulting engineer, in the initial start-up, have
<br /> to inspect it and submitreport like every two creeks, mig t' be even every week,
<br /> for the first three months and -every two weeks for a period and than it slacks
<br /> off. On the other- hand'the regulations say -that a licensed operator which is a
<br /> skilled person must visit the plant every day .-'o th---.,ce 3 11o�Ar pie 'has. to do
<br /> some. basic, minimum tests � thea monthly samples have to be collected and sent to
<br /> a li cen sed laboratory to do things 'like BOD, COD, nitrogen series. and that's the
<br /> only place I think the regulations are light you 40might want to' since you're in-
<br /> terested in Nitrogen you might want add .n your' approval, that they do nitrate,
<br /> organic .nitrogen and e=onia it really isn't any more work once they've got tie
<br /> samples. Thee State regulations only ask for nitrate, Most people do it anyvaq.
<br /> Knowing what your nitrate i s, is like having a pile of money in your fist and
<br /> knowing what you've got in your fist, you have no idea of what#s in the pocket. r
<br /> Mr. Buckingham, "One thing I was wondering, I would take it then that in the for-
<br /> mation of responsibility of condominium management that the requirements of manage-
<br /> ment of the plant would thea be passed on to the homeowners group or. . . .so that you
<br /> always have a central body responsible*" 'Mr. Dobie stated that DDS , would not
<br /> approve of them othervise5 you jut can't take a bunch of people. and put them to-
<br /> gether.ether. Mr. ikon asked ghat was done with the residue* Mr. Dobie explained with
<br /> this system that clarifier that comes after the rotating biological contactor
<br /> settles thalle sludge to #, Le bottom a.rie a y _ Ftp -es t, �a .iere ix�f :e 'e are ski=ed
<br /> {�
<br /> ' '� sol-idstne i�'l F C/LJ.A._Y_ ri - % �` 1 fti }�5 ..� a.*Lr � •-f' } ?v �f{
<br /> an g0.a2r �s y.fr sludge holding tank and you get quite a.bit of anaerobic composition ,a
<br /> in that tank and once or twice a. year that residue from the septic tank., the same
<br /> aff you would in any septic tank (Large commercial facility) is pumped and taken 41
<br /> whereever septic Iramping goes. Nor. Wilson questioned how determination, in made as
<br /> to the number of gallons of sludge there may be. Mr. Dobie aaered that the tank '
<br /> s_F.
<br /> that holds the sludge is about twelve hours detention on the project, so in this case ::4a
<br /> it would be 20 to 25 thousand gallons, and a residential complex like this is usually h:
<br /> pumped once a year, so you'd have about twenty five thousand gallons a year. Mr. Wilson
<br /> asked if the sludge could be used for ferti er; Messrs. Dobie, Lawrence and Buckingham
<br /> all agreed that the nitrogen content, if properly treated it could be used as a soil
<br /> co itloner, but it would not be a fertilizer,, it would not be high enough in phosphorous r
<br /> or nitrogen to be considered fertilizer, if properly composted or thermally treated or
<br /> whatever method ccm mon t doing that it could be use as a soil c end t . her anc� it's not
<br /> `
<br /> economically feasible to do that for such small qu ntities&
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