| General > General Technical Chat |
| 140 million liters of water down the drain |
| << < (6/14) > >> |
| EEVblog:
--- Quote from: Rufus on April 21, 2014, 01:39:49 pm ---The public are not generally complete idiots, they are generally ignorant. --- End quote --- True, but unfortunately all too many transition into being idiots when confronted with the facts which do not persuade them. * Idiot is defined as sub-normal intelligence. So I'd say anyone who can't apply reason and facts to situations would fit nicely into that category. |
| EEVblog:
This is a typical analysis of a Sydney water supply (source only, pipes not included) https://www.sydneywater.com.au/web/groups/publicwebcontent/documents/document/zgrf/mdq0/~edisp/dd_044731.pdf and for a total wank: http://tapsydney.com.au/ and for the full info: http://www.nhmrc.gov.au/_files_nhmrc/publications/attachments/eh52_aust_drinking_water_guidelines_update_131216.pdf Page 189 has chlorine. They even pump ferric chloride into the system (the stuff you use for PCB etching) Page 1161 |
| IanB:
--- Quote from: EEVblog on April 22, 2014, 03:47:07 am ---They even pump ferric chloride into the system (the stuff you use for PCB etching) --- End quote --- Ferric chloride is a flocculant, used to clarify water and to remove harmful impurities. Most of the added iron is removed downstream by filtration (which was its job when added), but even if not removed iron is an essential nutrient and is not particularly harmful in small amounts. When you get worried about water purity, you just have to watch your pet dog drinking out of a puddle on the ground and then consider how soft and feeble we humans have become... |
| SeanB:
Here I knew the park manager at the local supply dam. You really do not want to know what is in the raw water, they would get worried when the cholera count was over 10 per litre of water. They also did not recommend drinking the raw water as well. He is a diving instructor as well, and would dive in the dam, but the water is so turbid that he used to give black diving classes there, at 10m depth you could not see a million candlepower torch unless you held it less than 50cm from your mask. There are at least a dozen outboard motors there that are marked with an approximate location, but which cannot be found unless you drain the whole dam. They did find the Hilux that went down the slipway though by accident, it was a little big and straight so was easy to find. |
| vk6zgo:
--- Quote from: scientist on April 22, 2014, 02:50:57 am --- --- Quote from: tom66 on April 21, 2014, 10:36:07 am --- --- Quote from: vk6zgo on April 21, 2014, 09:59:45 am ---Also,TV shows don't help,where Jack Bauer,or someone similar stops a terrorist from dropping a tiny vial of poison or bacteria into an huge dam. --- End quote --- Maybe it's a homoeopathic poison? --- End quote --- Or an actual biohazard? Bacteria reproduce incredibly fast, and urine doesn't. I wouldn't be happy drinking water contaminated with anthrax or Ebola. --- End quote --- Most such bacteria are not at all happy away from a congenial host,like you,me,or an animal. Extreme dilution in water which contains natural & added chemicals which are noxious to them,is unlikely to promote rapid,(if any),growth. Chemicals like Chlorine are remarkably effective at killing bacteria----its mainly inside us where you can't use them (for fear of killing us),that we have a problem! |
| Navigation |
| Message Index |
| Next page |
| Previous page |