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SPECIFICATION OF CERAMIC MEMBRANE

Ceramic membrane has &.'Mm as a nominal pore sie( an$ is cateorie$ to micro)filterF=G. ?aw water is fe$ into %(&&& membrane filtration cells( which has %.7mm)I as a$iameter( an$ totally collecte$ as filtrate F$ea$)en$ filtrationG. @are #ol/me ofmembrane filtration cell Fin total '7 @G can store m/ch t/rbi$ matter( an$ as a res/lt(

realie the lon W inter#al. >n$ thanks to the filtration collection cell preparation(filtration is finishe$ with #ery low press/re( altho/h the o/ter $iameter of themembrane is #ery lare of '6&mm)I.

Pit're 2. Cerami mem!ra"e )tr't're

FILTRATION MECHANISM 3 INTERATION WITH COA-LATION

Nariety kin$s of water can be treate$ an$ p/rifie$ by the interation with coa/lation

an$ ceramic membrane filtration. ,#en tho/h the nominal pore sie of the membraneis &.'Mm( this interation filtration system can remo#e not only the s/spen$e$ soli$(b/t also some $issol#e$ material( bacteria( protooa an$ #ir/s.

Pit're 4. Cerami mem!ra"e $i%tratio" )5)temCHARACTERISTICS OF CERAMIC MEMBRANE SYSTEM

Membrane filtrationMembrane filtrationDeadDead--end filtrationend filtration

Backwash interval : 2Backwash interval : 2--6 hrs6 hrs

Coagulation/FlocculationCoagulation/Flocculation

BasinBasin

PretreatmentPretreatment

Fully atomized flocculationFully atomized flocculation

No sedimentationNo sedimentation

Wastewater treatmentWastewater treatmentSolidSolid--liquid separation of dischargeliquid separation of discharge

Supernatant is returned to Coagulation/Supernatant is returned to Coagulation/

Flocculation Basin.Flocculation Basin.

Coagulant

Raw waterRaw water Feed pumpFeed pump

Backwash tankBackwash tank

Membrane moduleMembrane module

FiltrateFiltrate

Air compressorAir compressor

Treated waterTreated water

reservoirreservoir

Thickened sludgeThickened sludge

Backwash wastewaterBackwash wastewater

SupernatantSupernatant

ThickenerThickener

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Ceramic membrane has a stron rob/stness aainst hih t/rbi$ity o#er '(&&& 3T.3ormally( most membrane filtration system ha$ no chance b/t to stop operation( orinstall an a$$itional pre)treatment to remo#e s/ch t/rbi$ matters before membrane.The pilot test for ri#er s/rface water was con$/cte$ by =,T>W>T,? in %&&&( an$ thenthe raw water t/rbi$ity was s/$$enly increase$ /p to '(%&& 3T by hea#y rain. T=Pha$ increase$ accor$in to the increase of t/rbi$ity( b/t after con$/ctin .W.( T=P

was completely reco#ere$ witho/t C2P. D/rin this perio$( 3O operation stophappene$ an$ stable operation was confirme$.

Pit're :. Operatio" re)'%t) 7Hi&9 t'r!i*it58

;ir') remo(a%

?ear$in the #ir/s remo#al( an in#estiation was carrie$ o/t /sin two kin$s of#ir/ses that ha#e a $ifferent isoelectric point( =)% an$ PhiS)'58. oth #ir/ses were$ose$ into the raw water taken from the water reser#oir with the concentration ofabo/t '&5cf/m@( an$ filtrate was sample$ at the timin of 'G riht after backwashFWG an$ %G ' ho/r after startin filtration. The confirme$ #ir/ses in the filtrate

showe$ /n$er $etection le#el for all samples( an$ the #ir/s remo#al rate showe$ morethan @?N *. Toether with coa/lation( ceramic membrane can also remo#e s/ch#ir/ses perfectly.

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