Hypolimnetic aeration
¥Prevents anoxic/anaerobic
conditions by aerating the hypolimnion
¥Destratification
vs. layer technique
| Hypolimnetic aeration is
another potential technique for 3MP.
It involves the prevention of anoxic conditions by aerating the
hypolimnion as can be seen in this pictureÉ |
|
| In aerating the hypolimnion,
dissolved oxygen is increased and less phosphorus can be released. This is because the cycle of
phosphorus leaching is disrupted - aerobic conditions promote the absorption
of phosphorus |
|
| 2 types of aeration One that destratifies the H2O column,
and one that avoids mixing the bottom layers with the surface. |
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| The layer technique would
be the type of aeration to consider because the destratification technique
could increase and recirculate rate of Phosphorus release, which could lead
to more algal blooms |
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| the layer technique does not
destratify, and could eliminate anoxic conditions to minimize algal blooms. |
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| This aeration technique
however, is rather expensive, compared to the alum treatment and fish stock
manipulation because it requires installation of aerators and an ongoing
circulation system and a continual management program. |
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