NUTRIENT INTERCEPTOR

This invention relates to compositions and methods for removing phosphates from water, particularly agricultural run-off. It also relates to methods of making the compositions. The compositions comprise biochars obtained by pyrolysis of organic feedstock, in particular hemp hurd, more generally a secondary xylem feedstock with calcium content greater than 2 g/kg. The organic material can be mixed with cation donors before pyrolysis, the cation donor being basalt, dolomite or haematite.

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WIPO Patent:

This invention relates to compositions and methods for removing phosphates from water, particularly agricultural run-off. It also relates to methods of making the compositions. The compositions comprise biochars obtained by pyrolysis of organic feedstock, in particular hemp hurd, more generally a secondary xylem feedstock with calcium content greater than 2 g/kg. The organic material can be mixed with cation donors before pyrolysis, the cation donor being basalt, dolomite or haematite.

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