Our society has moved from a phosphorous recycling loop, where animal manure and human wastes were spread on farming land to recycle nutrients, to a once-through system, where a large part of the used (artificial) fertiliser consists of phosphate compounds extracted from mined, non-renewable rock. To provide a more sustainable solution in fertilisation, the phosphate in manure should be used instead, thus in feet repairing the broken agricultural phosphorous cycle. In order to guarantee an environmentally sound use of manure for agricultural purposes, its composition should be certified and free of heavy metal pollutants.
To achieve these goals, the research described in this proposal is addressing two objectives:¿
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