WEBVTT

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The Federal Emergency Management Agency

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tasked the United States Army Corps of

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Engineers with delivering a reverse

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osmosis water purification unit to the

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University of North Carolina Asheville

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campus . Tyler Bagot , a contracting

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officers , representative and civil

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engineer explains how the system works .

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Uh My name is Tyler Baggett . I'm a

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civil engineer uh from the New Orleans

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District . We have water coming in from

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the city untreated . Uh It's

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chlorinated but it's untreated . So

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they're just pumping a tree out of the

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reservoir , feeding it in it's non

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potable . And that's the goal we're

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gonna turn that water into potable

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water and send it through the other

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direction . So how do we do that ?

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Imagine the pipe comes out of that tube

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from the vault over here , goes into

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these bag filters our first step . Uh

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These are here because we're trying to

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remove the sediment that's in the water .

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So SD I is reading about just below six

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which is a silt density index , but

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don't worry about it , just say there's

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too much stuff in the water . Um And

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the way that we remove that is with

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essentially everything up to that

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trailer , what we're doing is a five

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micron filtration . Again , more fancy

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words , but we're gonna pick out the

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biggest pieces with this , this whole

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system can be ran with one of these .

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We have two of pretty much each of

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these systems , but you can run it with

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just one . So it's redundancy if we

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ever have to get in there , clean it

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out , fix it , swap it out . Here we go .

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Coming up , water comes out , comes up ,

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pours into our carbon vessels ,

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activated carbon . It removes the

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chlorine within the water taste

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odor , etcetera . Uh It's basically our

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first line of defense of removing

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things other than the large pieces of

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sediment . Uh The stuff that you can't

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see stuff that's already mingled in

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with the water and stuff like you can

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see a grain of sand , you can see water

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and they're both together , but you

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can't see the chlorine in the water .

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This takes care of that stuff comes out

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of this tank flows through our

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multimedia filter that's basically

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aggregates that get large to smaller to

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super fine . Just another backup filter

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and you can run it with two of them .

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We have four . So if we ever need a

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clean one again , we could just wash it

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out after we're done with that ,

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wouldn't you guess it another bag

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filter ? Because you know why we're

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trying to get everything out ,

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redundancy is key . Uh And as we come

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out of the back filters into the

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trailer , it's basically an all in one

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system . Uh , it's able to drain itself

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with the water that's coming in . Um ,

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here's our Permian outlet , which is

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the water that we're gonna be flowing

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into the system as we walk over here .

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Same thing is outside a little

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different . So we kind of have the same

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stuff , the larger aggregate to the

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smaller aggregate at the top of this

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one . We have Nexus in which is a kind

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of engineered uh aggregate that

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grabs almost everything . So a lot of

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what everything else out here is

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attacking that product is able to grab

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the rest of it , whatever's left over ,

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it just grabs it . Um And you know what

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we do , we send it through another

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filter . They're not in there right now .

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But if you can imagine a pool cartridge

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filter , if you've ever seen one of

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those , it's like that , but much ,

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much , much , much , much smaller .

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This is the actual ro unit . This is

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the reverse osmosis membranes . So

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these can filter out to 23

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10/1000 of a micron . It's like this

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was so , so small . It basically pushes

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one single piece of water molecule

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through with pressure and it strips

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everything else off and all that flows

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right on out , it washes itself and

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then the clean water goes into that

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line outside . Um But that's why we

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have so much filtration before because

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these are ultra , ultra sensitive big

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motor pressurize it . Um

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super smart system . Basically can read

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all the , uh , readings of the water

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all in real time . And you know what ,

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it also does , it transmits it right

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there . You ever want to see what's

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going on with the water ? Just look at

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your laptop , it's coming your way . So

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the pressure that's coming out of the

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city of Asheville system is extremely

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high . 200 P si um , and what we're

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doing is we're gonna reduce it down .

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It kind of looks like this , but it's

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to reduce the pressure . So this one is

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to increase the pressure . So we're

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going to repressurize it because the

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campus is actually way up the hill . Um

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So it takes a little bit of time to

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flow through the line and push it all

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the way up the hill because it's quite

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a bit of ways and quite a bit up . So

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once we get through here , we're going

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to reintroduce some treatment because

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the water that comes out of the ro is a

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little too pure to make it safe as far

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as Department of Environmental Quality

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for North Carolina Standards . Um , and

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then we're gonna have 20,000 gallons of

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surplus . So we can create 200 gallons

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per minute . But we're also gonna have

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2 20,000 gallons on standby . So if

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everyone's flushing their toilets at

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the same time , we got you bar comes

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through drops into this back in there

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and we're back with water into the

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campus one last thing where does that

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water go ? Uh , we not really water ,

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it's just stuff that won't fit through

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with our own membrane . Uh So as , as

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it comes out of the trailer , we have

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this line , you can actually see it .

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It's being created right now .

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Essentially go along the side of the

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fence down and out that way , there's a

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sewer manhole at the very end there ,

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we're going to drop our efluent line

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down there into the sanitary sewer .

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The water is extremely clean . It's

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been filtered four times , essentially

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distilled water , but we're just

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tossing it back because Daro is picking

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science , bringing water back to the

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campus .