Plants are used as biofilters in a range of applications. From garden ponds, through to commercial applications and the purification of storm water before it enters ecosystems.
Using plants as biofilters works in a number of ways, importantly the separation of grit, soil and other impurities from water before it enters streams and rivers. Plants can also play a part in removing salts, phosphates, nitrates and ammonia from water.
So garden plants as common at water lilies and duckweed can help clean water, with duckweed being particularly efficient.
What is a Biofilter
A biofilter is simply organic material used to remove pollutants from the air or water. Plants are natures living biofilters and perform an important roll in protecting our environment. Plants are used to oxygenate and filter water in ponds. Living plants are being used as indoor biofilters.
So the term biofilter may apply to water entering a pond, storm water applications, hydroponics, air filtration and other applications. Perhaps the concept of stormwater biofilters where a swale (basin) is constructed over a large drain pipe, plants, geotextiles and other media are used to filter the water before it enters the drain, which may lead to a storage facility.
Plants for biofilters are available from the following suppliers
Native grasses, sedges, rushes, lilies, wetland plants, ornamental grasses and grass trees. Contract growing. Cells, tubes and pots. Contemporary water wise garden solutions and revegetation specialists. Unique garden decor, pots and original sculptures. Delivery available. www.plantsandlandscapes.com.au