Viewing profile — ohthanks
ohthanks
HN member- Joined
- Fri, Apr 23, 2010, 4:44 PM UTC
- HN karma
- 63
- Public activity
- 19 items
- HN profile
- View on Hacker News ↗
About ohthanks
Recent public activity
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Comment #45518828
The vast majority of these 400 heat deaths have nothing to do with the power grid. They are people living outdoors, roofers, elderly, etc. When the temps hit 105+ for long periods …
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Comment #40014510
They don't boost the feed pressure, just isolate the output permeate line from the back pressure of the storage tank. Instead of the membrane output pushing against the increasing …
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Comment #39997291
I have built and sold RO systems for 20+ years. It's a weird industry and there are some competing desires in place. In general it's kind of a mess and it's difficult for consumers…
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Comment #39376160
The articles state higher levels in bottled water treated with RO but there are many stages of treatment and delivery involved in industrial scale bottled water production. Unclear…
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Comment #37303293
ZeroWater uses a mixed bed ion exchange resin (anion and cation) to attract and hold dissolved ionized solids. Mixed bed resin is very effective and will remove nearly 100% of diss…
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Comment #35866573
There can be downsides to the permeate pumps, but not many. Installed with a standard hydraulic shut off valve (ASO) you won't see any issues but you won't get much in the way of i…
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Comment #34491301
I sell residential RO systems. Industry wide the tubing is typically LDPE and the housings/fittings are mostly polypropylene. There is no real practical way to build a residential …
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Comment #19454268
This is not a consumer product at all. I don't know how useful it will be but it's designed to be development tool for early art direction visualization. Even for 2d visualization …
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Comment #18386816
I think it's actually pretty hard to tell much from the membrane itself, my understanding is that most of the process is based in the membrane preferring the smaller water-only mol…
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Comment #18386781
You can remineralize with limestone post-filtration. Or eat food.
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Comment #16943815
I didn't mean that a custom domain is an indicator. Just that they go to the trouble to register throwaways for this use and it isn't limited to just free email services.
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Comment #16942991
I periodically deal with recurring fraud from what seems to be a pretty organized network. - Orders are placed with stolen credentials with correct billing info that matches AVS. -…
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Comment #13525995
There are no official treatment recommendations for PFNA, PFOA, PFOS that I know of but they can be treated with activated carbon, RO membranes or some combination. GAC seems to be…
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Comment #11070884
This is totally correct. It is also not very applicable to drinking water & whole house systems that homeowners are interested in. There are carbon cartridges with ion-exchanges re…
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Comment #11070519
You will for sure, I actually like it but not everyone does. You can remineralize and change the taste without too much trouble. I would avoid any other claims made for that proces…
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Comment #11070473
Carbon filtration will not remove dissolved solids (lead, heavy metals) without added ion-exchange resins. RO is generally the most effective broad spectrum treatment method for dr…
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Comment #4806234
I can't vouch for any the actual content he is posting, but I can very confidently confirm this is his blog.
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Comment #4472902
http://www.kickstarter.com/projects/zioneyez/eyeztm-by-zione... seems like a pretty clear example of this. Backers are actually starting a separate forum to discuss legal action. D…
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Comment #2753880
pretty sure that is my friend Ben Barry, http://www.designforfun.com/ been doing some very excellent design work for fb over the past few years.