Background Information on our Project 1. 2. 3. 4. 5. 6.

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12 Νοε 2013 (πριν από 4 χρόνια και 7 μήνες)

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Conference Call with Daniele Lantagne, February 6, 2009

Background Information on our Project


1200 households


15 m by 20 m filter


project started Fall ’07 when doctors noticed water
born diseases and brought it to
the attention of our club


1st assessment
trip was May ‘08


The problem is that the slow sand filter is clogged, so it is not used.


Bacteria Counts


Mountain Spring Source: 0 E. coli, 100 total coliform


Water Leaving Treatment Facility: 0 E. coli, 100
200 total coliform

7. Turbidity

a. Coming in
to Plant: 0 NTU

b. Coming out of the Faucet: 0 NTU

c. These measurements were taken during the dry season when the water is clean.
During the rainy season, the water coming out of the faucet is muddy.

8. We’re working on 3 subprojects

a. Cleaning
the filter

b. Chlorination

c. Wells

Daniele’s Suggestions


Make an assessment trip during the rainy season to measure the turbidity at its


If the turbidity is over 50
100 NTU, then we need to pre
treat the water before
going into the sand filter
. Pre
flocculation treatment using Aluminum Sulfate


A way to reduce turbidity at the household level is Proctor & Gamble’s PUR
water system
, which is being used by an NGO called Population Services
International in the DR. We should meet with them at the
ir offices in Santo
Domingo. PUR is expensive (10 cents to treat 10 L of water)


Make sure that the sand is not too fine

this may be why the filter is clogging


Measure the flow rate coming out of the source v. in the pipes to see if there are
leaks that ar
e introducing fecal coliform & E. coli & turbidity




Put an automatic doser in the pipe right before the pipes branch off the
main line from the mountain spring source.


Ask the government which automatic doser is used in the DR


Honduras has an a
utomatic doser system & circuit riders who go around
maintaining them.

Haiti has an NGO called International Action that uses
automatic dosers.


We could also set up a person who adds chlorine tablets or powder to the
clean water storage tank every day


re should be 0.2
0.5 mg free Cl at house farthest from faucet


Household chlorination

1% Cl solutions in bottles so that people only
have to add 1 cap to treat 20 oz. of water. Haiti uses a bottled solution
called Ole Vie.


Because the people store water,
we may have to add 1
1.5 mg of chlorine
when the water comes out of the storage tank to maintain a residual for 24


If we want to do household chlorination instead, we can make a 1% Cl
solution so that 1 cap chlorinates 20 oz. of water


We should not
jump to household solutions immediately because we may
be setting the DR back. Pipe treated infrastructure water is a likely
possibility in the DR.

3. Documents that Daniele Sent Us

bottled chlorine solutions for households

information on automatic
dosers that International Action uses in Haiti