Showing posts with label Primitive Technology. Show all posts
Showing posts with label Primitive Technology. Show all posts
Monday, April 4, 2011
More and More water filtering info
Some construction tips and slow sand technology.
BACKWASHING a biological sand filter when the flow rate slows down. Forcefully backwashing a slow sand filter, particularly a small slow sand filter with layers of different sizes of sand, will destroy it. The flow rate is slowed by a buildup of material on the TOP FEW CENTIMETERS of sand. Simply gently agitating this layer and DRAINING OFF the cloudy water is all that needs to be done.
Now for the main site - David H. Manz the inventor.
More water info
That is the "old tech"
Now the BioSand filter.
Source water can not contain chlorine, soap or salt water as they will stop the bio-filtration process.
This PDF is a MUST READ!
It takes 5‐10 days for the biological layer to reach full maturity and effectiveness. During this time, the filter will become increasingly effective. Post filtering chlorination provides safe water during the period of time it takes for the biological
layer to form.
A PDF "manual" on water safety, and excellent read with lots of basic info.
A treasure of PDF files on how this type of filter is built and works.
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