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d r ai n T R A D E R


A e r ati o n t a n k o r g a ni c o v e rl o a d r e s ol v e d b y L a n di a Mi x e r s


L a n di a mi x er g ui d e r ails at Milt o n T


h e i ntr o d u cti o n of fi v e L a n di a mi x er s h a s br o u g ht a b o ut si g ni fi c a nt i m pr o v e m e nt s t o


t h e bi ol o gi c al a n d d e w at eri n g pr o c e s s e s at t h e r e c e ntl y u p gr a d e d W a st e w at er Tr e at m e nt Pl a nt ( W W T P) i n Milt o n, P e n n s yl v a ni a.


S er vi n g si x m u ni ci p aliti es i n N ort h er n N ort h u m b erl a n d C o u nt y, t h e n e w-l o o k Milt o n R e gi o n al S e w er A ut h orit y ( M R S A) W W T P h as b e e n d esi g n e d s o t h at it is p o w er e d b y a n a er o bi c tr e at m e nt of w ast e w at er fr o m t h e n e ar b y C o n A gr a f o o d f a cilit y ( m a k ers of br a n ds s u c h as H e alt h y C h oi c e r a vi oli a n d s p a g h etti m e als)


D uri n g t h e d esi g n of t h e u p gr a d e d pl a nt, d e m a n d f or C o n A gr a pr o d u cts h a d l e d t o a n i n cr e as e i n its pr o d u cti o n, w hi c h i n t ur n cr e at e d a n or g a ni c o v erl o a d i n t h e tr e at m e nt pl a nt’s a er ati o n t a n ks. A n d d u e t o t h e a nti ci p at e d r e m o v al of C o n A gr a’s s ettli n g pr o c ess es, t h e str e n gt h of t h e f o o d pr o d u c ers’ w ast e w at er w as e x p e ct e d t o ris e b y u p t o o n e t hir d.


S e e ki n g a c ost- e ff e cti v e w ast e w at er tr e at m e nt s ol uti o n t h at w o ul d als o r es ol v e hi g h sl u d g e dis p os al c h ar g es a n d m o u nti n g e n er g y c osts, pl a nt o p er at ors at Milt o n s a w t h e o p p ort u nit y f or a n a er o bi c pr e-tr e at m e nt. T his w o ul d n ot o nl y


3 6


r e d u c e t h e l o a d o n t h e a er ati o n t a n ks, b ut als o pr o vi d e r e n e w a bl e e n er g y i n t h e f or m of bi o g as.


T w o f ull-s c al e 7. 5 milli o n- g all o n ( 2 8, 0 0 0 m 3) r e a ct ors w er e i nst all e d – d esi g n e d t o r e m o v e a p pr o xi m at el y 9 0 % of t h e or g a ni c l o a d fr o m C o n A gr a’s w ast e w at er, w hi c h t ot als b et w e e n 1 a n d 1. 5 milli o n g all o ns p er d a y. As w ell as t h e w ast e w at er, t h e r e a ct ors c a n als o r e c ei v e s e pt a g e a n d ot h er h a ul e d w ast es.


I n a d diti o n t o t h e n e w 2. 4 M G D A n a er o bi c Tr e at m e nt Pr o c ess, Milt o n W W T P n o w i n cl u d es a 4. 2 5 M G D Bi ol o gi c al N utri e nt R e m o v al s yst e m – a n d it w as h er e, as Vi ct or D err, S u p eri nt e n d e nt at Milt o n R e gi o n al S e w er A ut h orit y, e x pl ai ns, t h at t h e l ar g e, wi d e c h a n n els of t h e n e w v erti c al l o o p r e a ct or w er e c a usi n g pr o bl e ms.


‘ L o a di n g w a s of f t h e c h a r t’


“ T h e fl o w w as v er y l o w”, h e s ai d, “s o e v er yt hi n g k e pt s ettli n g o ut. Wit h C o n A gr a’s w ast e w at er a n d t h e 7, 0 0 0 p e o pl e i n t h e Milt o n ar e a t h at t h e pl a nt s er v es, o ur l o a di n g w as o ff t h e c h art. N o n utri e nts a n d v er y hi g h B O D. W e h a d t o k e e p s oli ds i n s us p e nsi o n b ut t w o of o ur c h a n n els c o ul d n’t b e t a k e n o ut of s er vi c e”.


d r ai n T R A D E R | M ay 2 0 2 0 | w w w. dr ai ntr a d erlt d. c o m


A s ol uti o n w as f o u n d b y i nst alli n g f o ur s u b m ersi bl e mi x ers m a d e b y L a n di a. T h es e L a n di a m o d el P O P-I g e ar- dri v e n mi x ers, c o m pl et e wit h g ui d e r ail ass e m bli es a n d s er vi c e pl atf or ms, w er e i nst all e d i n t h e i n fl u e nt, e ffl u e nt a n d r et ur n c h a n n els of t h e n utri e nt r e m o v al t a n k s yst e m. T h e mi x ers, t w o 2. 4 H P a n d t w o 4. 9 H P u nits, w er e s p e ci fi c all y si z e d f or e a c h of t h e c h a n n els t o pr o vi d e o pti m u m mi xi n g i n t h e ar e as w h er e t h e pl a nt w as pr e vi o usl y e x p eri e n ci n g a n a c c u m ul ati o n of s oli ds. T o a v oi d c o n fli ct wit h a n e xisti n g 2 0-i n c h s u b-s urf a c e pi p e, w hi c h r u ns t hr o u g h t h e r et ur n c h a n n el a n d t h e i n fl u e nt c h a n n el, L a n di a s u p pli e d c ust o m- b uilt s er vi c e pl atf or ms t o all o w f or mi x er i nst all ati o n wit h o ut dr ai ni n g t h e t a n ks. L a n di a’s c ust o mi z e d s ol uti o n all o w e d t h e pl a nt t o c o nti n u e o p er ati n g wit h n o i nt err u pti o ns t hr o u g h o ut t h e mi x er i nst all ati o n p h as e.


D err a d d e d: “ T his w as ess e nti al – a n d w e s o o n f o u n d o ut t h at L a n di a is a n e nt h usi asti c a n d d et er mi n e d pr o bl e m-s ol vi n g c o m p a n y – m u c h m or e t h a n a n e q ui p m e nt m a n uf a ct ur er. T h e y list e n e d t o o ur n e e ds. W e w er e c o n fi d e nt t h at t h e mi x ers w o ul d r es ol v e t h e iss u e wit h t h e s oli ds,


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