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<br />. <br /> as soil amendments and conditlont:rs. Bios~)lids odor control and ha::- <br /> are also bumeJ--<:reming energy ro use at vur ardous air emissions. <br /> , <br /> tre~tmt:nt plants-then recycled as <l construc- MWCC is responding -_I' <br /> tion material or an ingreJient m NmraLime. <1 vigorously to these new <br /> p- <br /> soil conditioner. In 1991. MWCC's Nuttallme requirements. We also <br /> program was presented an Award of Excellence recognize that fulfilling <br /> from tht: Naoonal Environmenml Awards them consistently will <br /> Council. representing 28 national organi:a- not only require Im- ~.,,.<;;_~~~~?;3t~~:~'}~~i <br /> nons induJing the Sierra Club, cht:: Audubon provmg our treatment ~'~"',...-... '~,""". ''''i:"'._''.'.~o..t.~~ <br /> ~~ ":'7:.&-.~:.2;,:~~A'::"~"'~~~."::i~_~._ __ ~ ".... <br /> Society and the lzaak Walton League. proces.s. but also deve!. MWCC'j biosolids re0# <br /> oping new techniques and equipment that cling program is nadonally <br /> TOUGHER Perhaps the most aren't currently part of our standard operations. recogl'1l::ed. <br /> STANDARDS, constant trend in These improvements could cost millions of <br /> NEW wastewater treat. dollars at a time of fiscal restmint. <br />. CHALLENGES ment is increasingly There are also concerns thar instruments <br /> stringent envlron- be developed to verify new environmental <br /> mental and health Standards. The five-vear srandards that are lower than our current ana~ <br /> operating perm" issued in 1993 by the Min- lyrical equipment is capable of measuring. <br /> nesora Pollution Control Agency to ;\-lWCC's <br /> Metro Plant-which treats 80 percent of the <br /> wastewater in the metro area and half the <br /> state's total-is the strictest in the plane's 55- METRO PLANT EFFLUENT OISCHARGE, 1983-1993 <br /> year hisrory. As part of the permit requirement, . 60 <br /> . <! ............. - - - - - - -........ -. - - - - -.. - -- - -...... "'p'!AMii!.ivii' rS~) <br /> the Metro Plant will develop a new sidestreaffi ~ ;: ~ 40 <br /> , . ~ <br /> a.~ <br /> process chat will lower the plant's phosphorus ~~i- <br /> . . . 20 <br /> ~:g <br /> discharge by up to 25 percent, Phosphurus is a . . 0 <br /> ~ - <br /> 83 84 85 86 87 88 89 90 91 92 93 <br /> naturally occurring element essential co most y..... <br /> forms of Life bue which in excessive amounts REGIONAL PLANTS EFFLUEN'T DISCHARGE, 1983-1993 <br /> lowers water quality. 60 <br /> . 5 ------------------------------piRMwU;eLis5) <br /> , <br /> . . 40 <br /> Besides met:tin,g tou.~her sranJJrds by , ~ <br /> a ~ <br /> . ~ <br /> . . 20 <br /> removmg polluwots In wastewater. MWCC . <br /> , c 0 <br /> . l[_.;' <br /> S 0 -. <br /> . 0 ,- . <br /> must also respond to the challen~e of a growing - <br />. 83 84 85 86 87 88 89 90 91 92 93 <br /> range of m:w regulatory requiremenrs such as '0. <br /> S <br />