Rain Tree Foundation
Thai Care e.V.
31 Moo 13, Thumbon Tawangtan,
Schwaneburger Strasse 23
Amper Saraphi. Chiang Mai 50140, Thailand
Friesoythe 26169, Germany
www.raintree-foundation.org
www.thaicare.de
Email: [email protected]
Thai Care e.V.
Schwaneburger Strasse 23
Friesoythe 26169, Germany
www.thaicare.de
Email: [email protected]
User Manual of the BioSand Filter
DAILY USAGE
Never pour chlorinated water into the Bio Sand Filter!
All users, including children, need to be taught how and why the filter works and about its correct
operation and maintenance. It’s very important to provide as much attention as possible for your daily
drinking water.
• Use the filter
every day
to, at least 20 liters,
twice per day
, but
not more
than 4 times a day.
• After the filling it will take about 1 to 2 hours till the water passed through.
• The filter (bio layer) needs
time to recover
and takes about 3 to 4 hours till start with filling again.
• Use the same source of water every day to improve the filter effectiveness.
• Use the
best source
of water (least contaminated) that is available
• The diffuser plate must always be in place when pouring water into the filter –
never
pour water
directly onto the sand layer.
Slowly
pour the water into the filter.
• The lid should
always
be kept on the filter.
• Use a dedicated bucket for fetching the source water.
• Use a dedicated
safe storage
container to hold the filtered water which has:
-a small opening to prevent recontamination due to dipping with cups or hands
-a tap or spigot.
• Place the receiving container as close to the spout as possible.
• Water must always be allowed to
flow freely
from the filter
– never plug the spout or connect a hose
to it.
• Do not store food inside the filter.
Plugging the spout could increase the water level in the filter, which could kill the bio layer due to lack
of oxygen.
Putting a hose or other device on the spout can siphon or drain the water in the filter, dropping the
water level below the sand layer.
Sometimes people want to store their food on the diffuser plate because it is a cool location.
The water in the top of the filter is contaminated, so it will contaminate the food. Also, the food attracts
insects to the filter.
MAINTENANCE
There is some key
maintenance
that is required after a filter has been installed and used regularly in
case the flow rate will decrease or at least
every 6 month
.
Disinfection:
The outlet spout will become contaminated during normal use via dirty hands, animals, or insects.
•
Clean the filter outlet spout regularly with soap and water or a chlorine solution.
•
Clean the inside of the treated water storage container when it looks dirty, when you do
regular maintenance or at least once a month. Do
not
pour chlorine bleach into the top of the
filter!
