Technologies for: Nutrient removal and recovery

The use of IOCS for P recovery

IOCS or Iron Oxide Coated Sand, are grains of sand with an iron-rich layer that are used for phosphate removal from wastewater. The IOCS is a waste product from drinking water purification and can chemically bond with phosphorous. An installation for IOCS (€ 2 250) is more compact than one for biological phosphorous extraction. By […]

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Hortizone to disinfect waste water of chemicals and biofilm

Cleaning and disinfecting drain and waste water is becoming a major issue. European and national governments are limiting the amount of residues (chemical and biological) that can flow into the open water. In order to meet current and future regulations, growers must clean their waste water. From and economic and environmental standpoint, drain water should […]

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Lemna minor: reducing N, P and other nutrients in waste water

In order to minimize the environmental impact of nutrient leaching when waste water is discharged, the waste water stream can be inoculated with and eventually treated by duckweed. Apart from the removal of N and P, duckweed also partially removes metals. Another benefit is that algae growth is reduced due to the blocking of the […]

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Recirculation wash water sand filter

Sand filters play a key role in drip irrigated crops as the sand bed within the filter removes all floating particles and thereby prevents drippers from clogging. As time passes, the sand bed starts silting and the filters have to be back washed. In case nutrient solutions pass through the sand filters, the wash water […]

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Recovery of nutrients using ion exchange

Although major efforts have been made in the past to close the nutrient water streams in soilless growing systems, still nutrient waste water flows are produced. Often these flows are discharged, leading to significant impact on the water quality of the surface and ground water bodies. The use of ion exchange can be a way […]

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