Essays about: "Anna-karin Mellin"
Found 1 essay containing the words Anna-karin Mellin.
University essay from SLU/Dept. of Soil Sciences
Abstract : Sewage sludge is a solid, semi-solid or liquid byproduct produced by waste water treatment plants. It contains both compounds of agricultural value (e.g. organic material, nitrogen, phosphorous, potassium and to a lesser extent calcium, sulphur and magnesium), and pollutants (e. READ MORE