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The lagoons are a waste treatment system; they let water evaporate so there's less of the stuff to deal with and they let the caustic absorb CO2 from the air, converting it to the less hazardous sodium carbonate.
The margin of error academic publications/engineering guesstimating handbooks need to be upgraded.
...and is heavily loaded with Iron Oxide
all the terrorist need to do is just sit back the world will crumble from all these other events
Quote from: tommya300 on 06/10/2010 21:55:00The margin of error academic publications/engineering guesstimating handbooks need to be upgraded.Tommy - my experience in the shipping industry is that the margins of error and acceptable tolerances would be fine if the spirit in which they were used was good and risk averse. However tolerances are often used to make commercial savings. As an example - the tolerance for steel thickness in shipbuilding used to be very generous because manufacturing processes were not accurate enough. However, those steel processes are now computer controlled to a high degree of precision - and the steel is now made to within a few fractions of a millimetre of the desired thickness. The problem arises in that the steel is now specced at damn close to the minimum rather than at the recommended thickness in the knowledge that the sophisticated processes can deliver within the tolerance. The saving in cost is significant (steel is charged per metric tonne) and the rules adhered to; but it is quite clear that spirit is wrong and potentially weak ships ply the ocean waves.
I think this event, whilst undoubtedly tragic for those concerned, is being a little hyped by the media. As dam failures (and related accidents) go (and they're a lot more frequent than many might think - have a look at http://en.wikipedia.org/wiki/Dam_failure for a list of dam failures and related accidents) this one wasn't one of the biggest and hardly "staggering".For info Quote...and is heavily loaded with Iron Oxide means that there's a lot of rust in it, which is not regarded as toxic. This is not to say that the sludge isn't toxic, but the toxicity is not due to the Iron Oxide content.And re Quoteall the terrorist need to do is just sit back the world will crumble from all these other events...WTF bring terrorism into it? What has terrorism to do with any of this?