Do you think I can run the system at very low flow speed? Almost dripping slow. This wouldnt turn the meter and I could waste less water. However, what if the membrane needs a good flow not to be clogged? There will be no turbulence that seems like a given. Will it even work? I'm hesitant to waste I don't know how many liters to get a cup of the product
Which membrane you will use, you can get data from specification for min and max flow rate . Normally, users try to increase output capacity, you want to make less waste and therefore asking reducing flow rate. If i know what is the water source, usage of treated water and capacity, we can suggest something, maybe you can make waste water recycle or increase stages number.
Many many "mistakes" or misrepresentations in this video. Either the creator is not very technical or is selling Vontron to ppl who don't know better. The reasons to use Vontron is (1) lower price. That's about it. Mistakes/Misrepresentations: Membrane diameter: slight increase in diameter says nothing about how much active area is inside. It is more likely to be a) nominal and not exact and b) due to fibreglass wrap process. Material: Polyamide is not one thing - it is a class of polymer. Both of them using polyamide tells us very little except for general characteristics. Active area: The fact that the Filmtec membrane has lower claimed active membrane area but superior flow characteristics says a lot. This can be due to more highly consistent membrane material (quality control on thickness, fibre reinforcement, etc) or just better quality material. Spacer mesh: not all spacer meshes with the same thickness are equal -> open area of the mesh and the types used (always layers) is critical to the ACTUAL active area of membrane in contact with water Working pH range: Anyone familiar with the HERO process will know why it is helpful to have a working pH range up to pH11 (just in case of dosing failure) Cleaning pH range: the difference between pH 1 and pH 2 is 10X, not "very close". pH 1 represents a 0.1M strong acid solution while pH 2 represents a 0.01M strong acid solution (big difference on kinetics). Flow rate: Two things 1) the testing regime is different, with the FIlmtec being more rigorous (2000mg/L at 25C rather than 1500mg/L at 25C - pH is also different but not clear to me how this would matter with NaCl) but at higher pressure (225psi vs 150psi). Difficult to compare completely. 2) Let's do the math -> If the Filmtec LE-4040 membrane has a range of 2500GPD +/-20%, then at WORST it would be 2000GPD under those testing conditions. This is the AVERAGE of the Vontron. OK that's my debunking of this one...I'm sure there is more but I'm out of time & patience.
Very interesting video, thank you very much for your work.
Do you think I can run the system at very low flow speed? Almost dripping slow. This wouldnt turn the meter and I could waste less water. However, what if the membrane needs a good flow not to be clogged? There will be no turbulence that seems like a given. Will it even work? I'm hesitant to waste I don't know how many liters to get a cup of the product
Which membrane you will use, you can get data from specification for min and max flow rate . Normally, users try to increase output capacity, you want to make less waste and therefore asking reducing flow rate. If i know what is the water source, usage of treated water and capacity, we can suggest something, maybe you can make waste water recycle or increase stages number.
Many many "mistakes" or misrepresentations in this video. Either the creator is not very technical or is selling Vontron to ppl who don't know better. The reasons to use Vontron is (1) lower price. That's about it.
Mistakes/Misrepresentations:
Membrane diameter: slight increase in diameter says nothing about how much active area is inside. It is more likely to be a) nominal and not exact and b) due to fibreglass wrap process.
Material: Polyamide is not one thing - it is a class of polymer. Both of them using polyamide tells us very little except for general characteristics.
Active area: The fact that the Filmtec membrane has lower claimed active membrane area but superior flow characteristics says a lot. This can be due to more highly consistent membrane material (quality control on thickness, fibre reinforcement, etc) or just better quality material.
Spacer mesh: not all spacer meshes with the same thickness are equal -> open area of the mesh and the types used (always layers) is critical to the ACTUAL active area of membrane in contact with water
Working pH range: Anyone familiar with the HERO process will know why it is helpful to have a working pH range up to pH11 (just in case of dosing failure)
Cleaning pH range: the difference between pH 1 and pH 2 is 10X, not "very close". pH 1 represents a 0.1M strong acid solution while pH 2 represents a 0.01M strong acid solution (big difference on kinetics).
Flow rate: Two things 1) the testing regime is different, with the FIlmtec being more rigorous (2000mg/L at 25C rather than 1500mg/L at 25C - pH is also different but not clear to me how this would matter with NaCl) but at higher pressure (225psi vs 150psi). Difficult to compare completely.
2) Let's do the math -> If the Filmtec LE-4040 membrane has a range of 2500GPD +/-20%, then at WORST it would be 2000GPD under those testing conditions. This is the AVERAGE of the Vontron.
OK that's my debunking of this one...I'm sure there is more but I'm out of time & patience.