Monday, 6 July 2015

algae in water filtration?? whooo

hey guys!!

Vital layer or Schmutzdecke!!

slow sand filters!! or biological filters !!
formation of vital layer- ripening of filter.

schmutzdecke -naturally occurring gelatinous
layer of living biological matter on a sand-
based water filter, for which it provides
additional filtration.

Etymological Note : German
schmutz ‘dirt’ + decke ‘covering.’

The composition of any particular schmutzdecke varies,
but will typically consist of a gelatinous biofilm matrix of bacteria , fungi , protozoa, threads of algae and a range of aquatic insect larvae. As a schmutzdecke ages, more algae tend to develop, and larger aquatic organisms may be present including some bryozoa , snails and annelid worm. until the layer is formed,the first few days the filter is usually run to waste.

-heart of slowsand filter
- hypogeal biological layer
-formed on the surface of a slow sand filter .
- layer that provides the effective purification in the
    potable water treatment, the underlying sand
    providing the support medium for this biological
    treatment layer.

#when the filter is newly laid it acts merly as an mechanical strainer and cannot truly considered  as biological.

medinotes :)

1 comment:

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