WERKWIJZE VOOR HET BEHANDELEN VAN VAST STADSAFVAL VOOR HET PRODUCEREN VAN PAPIERPULP VAN HOGE KWALITEIT EN KUNSTMEST, ALSMEDE PRODUKTEN DIE UIT DEZE WERKWIJZE VERKREGEN WORDEN.

摘要

Refuse contg. waste paper and paper derivs. is processed to form a fertilisers and a purified paper pulp by (a) pulping with a mixt. of H2O, a Ca and/or Mg cpd. NH4 cpd. a solvent for contaminants and a wetting agent at an alkaline pH to form a suspension; (b) treating the suspension with phosphate ions to ppte NH4 phosphate and Ca and/or Mg phosphate together with the contaminants; and (c) separating the ppte for use as a fertiliser. The process permits the recovery of a high-grade long fibre pulp free of ink, coating agents and waxes, and the simultaneous prodn. of an NP (or NPK) fertiliser with good controlled-release properties.