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Grasses Used to Help Purify Sewage
The plant at Forrest Hill, west of Brisbane, is using floating mattresses of plants to purify sewage.

Queensland Urban Utilities said the trial was a Queensland first and involved growing native varieties of grass on specially engineered plastic mattresses.

They have been used to grow 400 varieties of wetland grass plants, which draw toxins out of the water — things like carbon, nitrogen and phosphorus. It's a natural way to cleansing the waste water, that does not require chemicals or electricity.

Once the water is treated by the native grasses, it is purified with chlorine and then pumped to a local farmer who uses it for irrigating his crop.


 
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Federal Permit Required for use of Aquatic Pesticides - The EPA has approval of the courts to issue a National Pollutant Discharge Elimination System, which will require the filing of permits, along additional record-keeping and reporting requirements for point source discharges of biological and chemical pesticides that leave a residue. This included the operators that use pesticides for weed and algae control.


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