Phosphorus leaching from agriculture is a major source of eutrophication, where large amounts of phosphorous runs off from fields down into drainage ditches, from where it continues to spread into streams, lakes and seas. The greatest part of this run-off occurs in the spring, when snow and ice melts, and when it rains in the fall. By using our filter technology, large amounts of phosphorus can be captured before it reaches the ditches and has the chance to make its way in to our waterways. Furthermore, the captured nutrients can be recycled back into the same fields as fertilizer when the filter is changed.
Decentralized phosphorus leaching
Animal farm with manure handling (1)
Untreated sludge and manure can be an environmental hazard as it may leak eutrophicating nutrients, such as nitrogen and phosphorus, to nearby lakes and streams. Ecofiltration can customize phosphorus filters for treating different types of runoff water from manure plates, stacks and basins. One of the solutions consists of replaceable filters that are installed directly in drainage ditches, which can be strengthened with subsequent sedimentation dams to catch any passing phosphorus.
Ditch filters (2)
Runoff water from farmland has been identified as one of the largest causes of eutrophication. Ditch filters containing Polonite, installed directly in the drainage ditch, are a cost-effective way to reduce eutrophication and to enable the local reintroduction of nutrients back into the ground as fertilizer.
Individual sewage (3)
Individual or domestic sewers (excluding infiltration beds) can easily be upgraded either with a phosphorus filter – as a tertiary treatment – or by installing a ready-made WWTP with an integrated, replaceable phosphorus filter.
Retention ponds and constructed wetlands (4, 5)
Retention ponds for phosphorus removal and constructed wetlands are common methods to treat wastewater or runoff. With time, however, the deposited phosphorus is eventually released from the sediment. The reduction capacity depends, however, on the formation of the wetland and it does not achieve expected efficiency during colder periods. By upgrading ponds and wetlands with phosphorus filters, their effectiveness and phosphorus-reducing capacity can be significantly improved, and the filter media can be reused as fertilizer.
Restoration of waterways (6)
Eutrophic water can be restored by first pumping out the water and filtering it through filter media, and then releasing it back to the water source again. The phosphorous-saturated filter media can be reused on the farmland as fertilizer.