Re: [PLAEN] Nuevo comentario en el blog Sistema familiar de purificacion de agua

Carlos,

Informacion adicional sobre LifeStraw.

Saludos,

Hector

LifeStraw® Concept

Sharing a passion to achieve the Millennium Development Goals such as poverty eradication, environmental up-gradation, gender equality, and specifically 'reducing by half the proportion of people without sustainable access to safe drinking water' by the year 2015, we recognize the immense sense of urgency.  At any given moment, about half of the world's poor are suffering from waterborne disease, of which over 6,000 - mainly children - die from diseases contracted from unsafe drinking water. Today, more than one billion people of the world's population are without access to safe drinking water, causing lack of safe water supply to rob women and young girls of dignity, literacy and time.  Safe water interventions have vast potential to transform the lives of millions of people. Water filtration tools not only provide safe drinking water but also have a positive health impact on the most vulnerable populations, including young children, pregnant women and those with debilitated immune systems.  The Cochrane review (2006) demonstrates that water filters are the most effective interventions amongst all point-of-use water treatment methods for reducing diarrhoeal diseases. This study also proves that it is not enough to treat water at the point-of-source; it must also be made safe at the point of consumption.  LifeStraw® and LifeStraw® Family are both point-of-use water filters - truly unique offerings from Vestergaard Frandsen that address the concerns for affordably obtaining safe drinking water at home and outside.  The expertise for the filtration properties of LifeStraw Family is based on long term research and development by an experienced team led by Joop Scharstuhl in Prime Water International NV. LifeStraw® Family - Product Features Instant Microbiological Purifier   Filters a minimum of 18,000 litres of water - provides safe drinking water for a family for three years (calculated approximately on a family's consumption of 15 litres water/day - considering an average family size of seven in Sub Saharan Africa where an adult man consumes up to three litres, an adult woman drinks at least two litres and five children, each consuming at least one litre water on a daily basis. We have also considered aspects like increased water intake by pregnant/ lactating women as well as manual labour in high temperatures)     High flow rate with instant access to clean water     Complies with EPA guidelines for microbiological water purifiers Removes minimum 99.9999% of all bacteria Removes minimum 99.99% of all viruses Removes minimum 99.9% of all parasites     Works on highly turbid water     No electrical power or batteries required     No spare parts required     No running water required     Easy to clean pre-filter as well as purifier cartridge

LifeStraw® Family - Test Results

LifeStraw® Family has been tested at the University of Arizona for longevity and microbial reduction performance.   Results on Longevity The longevity of the LifeStraw® Family filter has been assessed for a capacity of 18,000L. After this volume of water containing turbidity and organic carbon was passed through the filters, the flow rate was still around 100 to 130 mL/min which represents 6 to 8 L/h. The flow rate values fluctuated between 200 - 320 mL/min at the beginning of the longevity trial, i.e. 12-19 L/h, and 6-8 L/h at the 18,000 L capacity. The cleaning frequency was assessed as mentioned below:   Prefilter cleaning frequency: approximately every 30 hrs    (represents a less than daily cleaning in the real conditions of use)   Filter cartridge cleaning frequency: approximately every 11 hrs   (represents a less than daily cleaning in the real conditions of use)   Bucket cleaning frequency: approximately once a week.   (shows that the bucket requires less maintenance) This longevity trial on the LifeStraw® Family filter demonstrates that the filter capacity lies around 18,000L or more. However, in our user instructions, we are still recommending daily cleaning of the pre-filter and the purification cartridge. Microbiological Efficacy On average the following Log10 reductions for each microbe and for all three units during the lifetime of the filters was as follows: Micro-organism LOG10 reductions EPA requirements E. Coli 6.8 6.0 MS2 virus 4.4 4.0 Cryptosporidium oocysts 3.6 3.0   Conclusion: The efficacy of the LifeStraw® Family filter has been assessed for the above microorganisms up to a capacity of 18,000L. This filter unit meets the EPA requirements of LOG10 6/4/3 reductions for these groups of microbes.  The micro-organisms used during the efficacy trial are representative of the ones encountered on the field. They have been chosen because they are particularly resistant to disinfection or particularly small in size, thus rendering their elimination difficult.   The ageing water characteristics are mentioned below: Water characteristics EPA standard of ageing water Ageing water used by University of Arizona* Water pH 6.5-8.5Roof 7.5 + 0.25 Total dissolved solids 50-500 mg/litre 50-500 mg/litre Turbidity 0.1-5 NTU 15 NTU TOC 0.1-5 mg/litre 5 mg/litre (as tannic or humic acid) Disinfectant residue not detectable < 0.1mg/litre in active chlorine Bacteria/virus/cysts not detectable CFU or PFU/100 ml or unit/L   * Higher concentration of turbidity and TOC in the ageing and challenge water is being passed through LifeStraw® Family. This makes the water quality closer to field conditions.   The challenge water characteristics are mentioned below: Water characteristics EPA standard of challenge water Challenge water used by University of Arizona* Water pH 9.0 + 0.2 9.0 + 0.2 Total dissolved solids 1500-150 mg/L 1500-150 mg/L Turbidity > 30 NTU > 100 NTU TOC 10 mg/L > 10 mg/L (as tannic or humic acid) Disinfectant residue not detectable at least < 0.1mg/L in active chlorine Bacteria 107-8 CFU/100 mL 107-8 CFU/100 mL Virus > 5 X 106 PFU/100 mL > 5 X 106 PFU/100mL Cysts > 5 X 104 oocysts/L > 5 X 104oocysts/L   * Higher concentration of turbidity and TOC in the ageing and challenge water is being passed through LifeStraw® Family. This makes the water quality closer to field conditions. Complete test results for 18,000 litres are available on request.

 LifeStraw® Family - User instructions

Before Use   Hang the filter up. Fill the dark blue bucket with water.     Open the red exit until some water is released.               Purify water   Fill the bucket with water.     Drink safe water from the light blue tap using a clean cup. Clean cartridge (Every day)   Close the light blue tap.     Fill the bucket and squeeze the bulb 3 times. Wait each time until the bulb refills.                 Open the red exit and wait for 5 seconds before closing.  Do not drink  the water released from the red exit!!!     Dispose of the dirty water properly.   Clean Prefilter (Every day)   Take the prefilter out and clean it with a cloth a water. No sharp objects!

El 15 de marzo de 2010 11:42, Carlos Ruiz <noreply-comment@blogger.com> escribió:

Carlos Ruiz ha dejado un nuevo comentario en su entrada "Sistema familiar de purificacion de agua":

Esto es una maravilla y aunque existen otros productos de uso similar, la portabilidad y bajo costo de lifestraw lo hacen extraordinario.
El año paso en un showroom médico encontré que había una empresa que lo estaba trayendo a Perú pero por más que he buscado el folleto y he rebuscado pro internet para encontrarla no lo consigo, si alguien tiene el dato agradeceré lo publique acá o me lo haga llegar a ceferele@hotmail.com



Publicado por Carlos Ruiz para PLAEN a las 15 de marzo de 2010 11:42