Damian Palin: Mining minerals from seawater

57,951 views ・ 2012-06-07

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Translator: Timothy Covell Reviewer: Morton Bast
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Translator: Òscar Aznar Alemany Reviewer: Sonia Redondo
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I collaborate with bacteria.
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Col·laboro amb els bacteris.
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And I'm about to show you
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Us vull mostrar
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some stop-motion footage that I made recently
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unes imatges que he enregistrat fa poc
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where you'll see bacteria accumulating minerals
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en què veieu bacteris acumulant minerals
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from their environment
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del seu entorn
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over the period of an hour.
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durant una hora.
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So what you're seeing here
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El que veieu aquí
00:27
is the bacteria metabolizing,
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és el resultat del metabolisme
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and as they do so
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dels bacteris,
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they create an electrical charge.
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que creen una càrrega elèctrica
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And this attracts metals
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que atrau els metalls
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from their local environment.
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del seu voltant.
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And these metals accumulate as minerals
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Aquests metalls s'acumulen com a minerals
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on the surface of the bacteria.
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a la superfície dels bacteris.
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One of the most pervasive problems
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Un dels problemes més comuns
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in the world today for people
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avui al món
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is inadequate access
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és disposar
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to clean drinking water.
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d'aigua potable.
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And the desalination process
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En la dessalinització
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is one where we take out salts.
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se n'eliminen les sals,
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We can use it for drinking and agriculture.
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i es pot utilitzar per beure o en l'agricultura.
00:55
Removing the salts from water --
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Extreure les sals de l'aigua,
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particularly seawater --
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especialment de la de mar,
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through reverse osmosis
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a través d'osmosi inversa
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is a critical technique
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és una tècnica crucial
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for countries who do not have access to clean drinking water
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per a països sense accés a aigua potable
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around the globe.
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a tot el món.
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So seawater reverse osmosis
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L'osmosi inversa
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is a membrane-filtration technology.
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és una tècnica de filtració de membrana.
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We take the water from the sea
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Prenem l'aigua del mar
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and we apply pressure.
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i hi apliquem pressió.
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And this pressure forces the seawater
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I aquesta pressió força l'aigua
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through a membrane.
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a travessar una membrana.
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This takes energy,
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Es consumeix energia
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producing clean water.
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per produir aigua potable.
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But we're also left with a concentrated salt solution, or brine.
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I també queda una dissolució concentrada de sal, la salmorra.
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But the process is very expensive
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És un procés molt car
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and it's cost-prohibitive for many countries around the globe.
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i prohibitiu per a molts països.
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And also, the brine that's produced
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A més, la salmorra que es produeix
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is oftentimes just pumped back out into the sea.
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sovint es bombeja de volta al mar,
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And this is detrimental to the local ecology
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fet que perjudica la regió
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of the sea area that it's pumped back out into.
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del mar on s'aboca.
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So I work in Singapore at the moment,
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Ara treballo a Singapur,
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and this is a place that's really a leading place
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que és un lloc capdavanter pel que fa a
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for desalination technology.
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la tecnologia de dessalinització.
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And Singapore proposes by 2060
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Singapur es proposa, per al 2060,
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to produce [900] million liters per day
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produir 900 milions de litres al dia
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of desalinated water.
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d'aigua dessalinitzada.
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But this will produce an equally massive amount
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Però això produirà la mateixa quantitat
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of desalination brine.
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de salmorra.
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And this is where my collaboration with bacteria comes into play.
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I aquí és on la col·laboració amb els bacteris entra en joc.
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So what we're doing at the moment
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Actualment estem
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is we're accumulating metals
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obtenint metalls com ara
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like calcium, potassium and magnesium
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calci, potassi i magnesi
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from out of desalination brine.
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de la salmorra.
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And this, in terms of magnesium
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El volum de magnesi
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and the amount of water that I just mentioned,
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a la quantitat d'aigua que he dit
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equates to a $4.5 billion
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equival a uns 3.400 milions d'euros
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mining industry for Singapore --
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a la indústria minera de Singapur,
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a place that doesn't have any natural resources.
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un lloc sense recursos naturals.
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So I'd like you to image a mining industry
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Imagineu ara una indústria minera
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in a way that one hasn't existed before;
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com no n'ha existit mai cap;
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imagine a mining industry
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imagineu una indústria minera
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that doesn't mean defiling the Earth;
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que no profana la terra;
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imagine bacteria helping us do this
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imagineu els bacteris ajudant-nos
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by accumulating and precipitating
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acumulant, precipitant
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and sedimenting minerals
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i sedimentant els minerals
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out of desalination brine.
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de la salmorra.
02:42
And what you can see here
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I el que veieu aquí
02:43
is the beginning of an industry in a test tube,
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és el principi d'una indústria en un tub d'assaig,
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a mining industry that is in harmony with nature.
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una indústria minera en harmonia amb la natura.
02:49
Thank you.
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Gràcies.
02:50
(Applause)
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(Aplaudiments)
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