Water Treatment Fundamentals – Part 13

Transcript

Speaker 1:                           00:01

Is that one has more than just an in and out, right? It has a third one. And where’s that third one going? Going to drain. So it’s got to put water down the drain when it’s making clean water. So this, this membrane is rated for what kind of production you to get up every day. Fifty gallons per day. That 50 gallons per day production is based on a couple of factors. It’s based on water temperature. It’s based on the inlet water tds. What is tds stands for? Total dissolve or total dissolved solids. So how much mineral is dissolved in that water and it’s the determined by the inlet pressure. We kind of talked about the pressure already. So I’m going to put water in at a certain temperature, a certain tds level and at a certain pressure. And what will that membrane produce in a day in 24 hours.

Speaker 1:                           00:47

That’s where that 50 gallons comes from. Those numbers are 77 degrees Fahrenheit. Water and what we test two is 500 milligrams per liter or 500 ppm is our inlet tds level and that’s no sodium chloride as a standard dissolved mineral. Okay. I’m not. It’ll produce 50 gallons per day. Oh, and by the way, it’s too open atmosphere. So if I just had this open and it was letting water out, I would produce 50 gallons in a day. We already know where I’m again, Wisconsin, Minnesota, Michigan, Illinois. Wonder that comes out of the ground or out of the lake or whatever isn’t going to be 77 degrees. It will it. It’s probably going to be more in the neighborhood of depending upon the time of year, somewhere between 45 and 55 degrees now. Fifty, 55 degree water. It’s not like it’s on your side. It’s just Wisconsin.

Speaker 1:                           01:43

I’m 55 degree water is a lot more dense than 77 degree water, so it’s. It’s like running maple syrup across the membrane versus 77 degree water, which is like water. That’s the way the membrane sees it. It’s a lot different operation. It doesn’t take a lot of temperature swing to change production of an Roi number is that water density’s up pretty significantly different. Okay, so the production rate goes down as the water temperature goes down. On the flip side, production goes up as water temperature goes up to. You’ll see some systems, especially in commercial systems, will have a temporary valve and they’ll actually mix in a little hip, hot water with the cold water. On the inlet side, you can get these up to right around 100 degrees Fahrenheit is the opera. Keep in mind, you start getting a warm. They start loosening them up so you. But you can increase production if you warm the water up a little bit

Speaker 2:                           02:37

bit too. I’m like, you know, 75 to 90. It would be like, perfect.

Speaker 1:                           02:43

I’m not enough. I’m not versed enough in our own to be able to tell you Alex exactly what the best temperature is, but that’s a fair. That’s probably a fair estimation. Somewhere a little bit warmer than 77. Less than 95 degrees is kind where you’re going to get the optimum performance. Okay. That means though, is you start warming water up, especially if you need cold water on the backside, you’re warming, it’s energy, it’s all energy and stuff. You know, you gotta chill it, you gotta do stuff too. So all that comes in when you’re making a system, all those factors come in. That’s why people like I’ve built, you know, they’re working in the areas where, okay, now you got to take all that into account. Okay, so, but you understand it. Colder water, lower production, higher tds, higher demand on what we’re going to do, lower production.

Speaker 1:                           03:30

So if I’m above 500 PPM, if you’re in midland or if you’re out in Pakos where the water’s 1500, 2000 milligrams per liter coming out of the ground, lower production, it’ll still do the job. Theoretically I could put that seawater through here at $30,000, $60,000 and I’m going to do some rejection and I’m going to make pure water. So what does that rejection rate about 96 to 98 percent of the dissolved solids. I’m going to say, okay, now another thing that as far as what Phil’s talking about, remember in order to make 50 gallons per day, I’m running the atmosphere. There’s no pushback and I’m making 50 gallons per day. Well, in order to store in my tank, I know as soon as I start filling this tank and I start depressing that, that diaphragm, I’m already working against six psi of air pressure, but as this increases, the pressure increases with it, so it’s going to start back crushing that membrane.

Speaker 1:                           04:29

As soon as it starts filling this tank. So your efficiency starts going down, the fuller the tank gets because you’re getting more and more back pressure. Okay? So these are, and I’m not saying that this is stuff you lead with, but the consumers out there that start googling and stuff, if they have a good day, ask questions. It’s good to know that stuff, right? It’s good that, hey, transparent. You’re right. That’s what happens. But. And like Jay said, or at least with Jay was alluded to, but the benefit is, is that membrane, what we’re competing against one to one is a membrane. That’s kind of made to go four or five down the drain to one. It’s making. This is one to one. Think back pressures. You lose some of your efficiency and you will. You’ll start running more water down the drain. Then you’re making, but as a one, as a level of comparison, it’s still going to be many times more efficient than a typical.