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# OAR Box 1384 Prepped by Charmelle Mathews



### Document

Number: 

# 57) ll-E-1 7 Docket Number: 

# A-94-5 2

Printed 7/2/2008 8:42.05AM

Sheet 57of 264P. 2

NOV-07-9 4 MO

N 11:5 6 A.G . Munter s Co . 81 3 -*|, 1 _.|566

_„_ _P " 02 ^f- < ,-, NOMJ5-199 4 16«3 5 FRO M MOPS.BSD.CPB^IS B R T T O 8813489264 5 P. 0 2 JJV P/ 7

CONTAC T REPORT Prom t Madelein e Strum , u s EPA , OAQPS , Emission s Standard s Division , Coating s an d Consume r Product s Grou p D a t o (a ) o f Contac t i Octobe r 31 , 199 4 and Novembe r 4 , 199 4 Contact ! Mr . Ander s Munter s Company/Agencyt Ahlquis t & Hunter s Technologies , Xnc . (AMX ) telephon e Kumber * 81 3 54 0 000 $ CONTAC T SUMMARY ! Th e conversatio n regarde d technica l difficultie s perceive d b y som e member s o f th e regulator ycommunit yan

d industr

ywit h th e us e o f biofiltratio n technolog yt o contro l o f styrene emission s fo r th e reinforce d composit e plastic s industry . Thes e difficultie s are : l ) pluggin g o f th e bio-filte r be d (du e t o styrene) , 2 ) drying o f the bio-filter , an d 3 ) bio-filter s becoming inactiv e du e t o non-continuou s emissions , suc h a s whe n the plan t i s no t sprayin g du e t o the intermitten t natur e o f production . Wit h regard t o 1) , Mr . Munter s pointe d ou t tha t a reinforce d composit e plasti c manufacture r (Fiberfor mAB , i n Kristinehamn , Sweden ) ha s bee n operatin g fo r five year s usin g the biofiltratio n technology . Th e systemha s bee n maintainin g a n 85 % destructio n efficiency , whic h i s wha t thei r syste mwa s designe d for . Mr . Munter s explaine d wh yth e proble

m mayb e presen t i n som e situations , suc h a s th e absenc e o f a particulat e filte r befor e the bio-filter . H e note d tha t othe r manufacturer s o f bio-filter s sometime s add carbo n t o th e filter , whic h can ge t plugge d up , a s styren e wil l polymeriz e o n tb e carbon an

d collec t there . Mr . Munter s adde d tha t thi s problemcoul d als o occur i f th e system contained a carbo n prefliter . Sometime s carbon i a use d a s a prefilte r i n orde r t o reduc e the siz e o f th e bio-filter . Thi s wa s no t don e fo r Fiberforn n A B (nor woul d i t b e don e fo r an yoth.<s r styren e emissio n source) , du e t o the possibilitytha t th e styren e woul d polymeriz e o n th e carbon . (Mr . Munter s indicated tha t AW T i s working wit h carbo n manufacturer s wh o ar e workin g t o develop carbon whic h woul d inhibi t th e polymerizatio n o f the styrene. ) H e als o speculate d tha t thi s proble mmayb e inheren t t o th e ope n bio-filte r system s wher e i t I B mor e difficul t t o provid e stabl e condition s fo r th e microorganism s t o consum e th e volatil e organi c conr-pound

s (VOCs ) - - AMT' s technolog yutilize s a close d bio

filte r system . Wit h regard t o 2), Mr . Munter s note d tha t th e AMT technolog

y incorporate s a n innovative waterin g syste mt o assis t i n maintainin

g th e correc t humidification condition s fo r th e microorganisms . Sometime s humidificatio n o f th e inle t VO C strea

m j,,i ? ••-•-• - - • ».••-• • OCT

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NOV-07-9 4 MO N 11:5 1 A.G . Munter s Co . 81 3 48 1 356 6 P.0 3 NCW-85~199 4 16*3 5 FROM 0ft3FS.ESD.CP3/I5 B R TT

O 8813489264 5 P
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i s necessary , however , i nadditio nt o th e moistur e provide db y watering system . Wit hregar dt o 3) , Mr . Hunter s notedtha t the Flberfon a plan t i n Swede ndoe s no t hav e a continuou s emissio nsource . The y operat e 8'hour shift s andclos e onthe weekend . They als o have a 2 -week shu t dow

nperioudevery

year . Mt, Munter s sai dthat , i ngeneral , afte r a 4-wee k shu t down , i t woul dtak e abou t a day t o fo r norma l resumptio no f th

e bio-filte r performance .

SIGNE D DATE : tf/*7/o($

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