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l <br /> S_'ST�:'! OPERA-:ON <br /> AIR TIR�T=`SE:t=' <br /> Air is drawn_ t:.r eugz t e Iles b: the blcwer , se= .ing to extract <br /> Y <br /> };`_e .C? fraction C_ --,e ccntam;,-.a`._cn rrs-,n t e SOi_ and to <br /> voia-.i' <br /> draw a steady c fresh. <br /> I f a:_ through the sei_ piles for the <br /> .� cN <br /> biological degrada.icn reacticns to Occur . Before the air is <br /> discharged to the atWcs_ ere, it is passed through a carbon <br /> ri '-er to entrap vola-._ ,sd components . <br /> 310,LCG.iCAL D?GRADAT;CY <br /> Aerobic b=o-cSical degradation o` organic wateria; sell is <br /> d by t:a ava=.ab=__'y e` nit:c5e7z (Ni , carbon ( C) <br /> inorganic salts (acs-._'_, p h csp;�arss . (P) ) , and o.rl ge_.m (0) in <br /> ilitated tre hydrocarbon contaminated soil, the <br /> hydrocarbon ccntami^at:cr_ serves as the carbc:I source; N and P <br /> ccmmcrl:7 SCarC? SOLI) a.re intom 2duc?d t::-vLlCh sprayings <br /> a^.d p.;°TCye:l iS renewed .:'y a:.r movenent ger_e=ated by the <br /> hig'r.-vacuum blowers . As the hydrocarbors degrade biologically, <br /> they are converted late carbon dioxide (Co`) , '+gate= (320) , and <br /> m0r9 cells illustrated by the generali=ed reaction: <br /> CH2o + NHS _ C2 CaHbCc A + C0 + x20 <br /> The r=ac`,ons occur at a ma:cimum -ata as lens as a_1 reactants <br /> are ava;lab,e ; si ce :T. _ and C are mai:.tamed readily <br /> available, only the ',.Ycr^.ca. On contaminationia�7al dec=eases , <br /> and the reaction ra_e dec-eases prcpor-.ienally until the <br /> avai_abi7 o` carbcr. reac es a ainimum. The tcculation Of <br /> t <br /> organisms decreases cc:c::rre.^.t=y with the decrease in carbon and <br /> return to it ecc tami.a-icn natural leve_ once the <br /> s :r - �. <br /> cartcn is depleted. <br />