Cleaning of a lake at Holme Olstrup on Zealand.

Cleaning of a lake at Holme Olstrup on Zealand.

Biofilter in pallet tank.

At the bottom 10 cm pearls.

Covered with fiber cloth.

20 cm "Perlite" (Greek porous stone) + non-woven fabric

20 cm large Leca balls, covered with non-woven fabric

30 cm Quartz sand, covered with non-woven fabric.

The rest is filled with coarse wood chips.

Buffer tank for water 1000 liters is filled with sea water via on and off timer, excess water flows back to the lake via hose.

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The water flow from the lake to the filter system is calculated at 1000 liters per 5000 m3 of lake water per day.

The flow through the Biofilter proceeds slowly over 18 hours, the last 6 hours dry out the filter, the bacteria grow and are ready for the next filling.

Very slowly, excess nutrients from the lake are eaten by the microorganisms and the lake gets clear water.

BioReco has not been used.

The plant has been running for 10 years, with the addition of BiosaHerb Environmental Microorganisms in the first 2 years. 10 liters / 100 m3 of lake water/year