Use of water-absorbing polymer particles for dewatering feces

摘要

The use of water-absorbing polymer particles for dewatering feces, the water-absorbing polymer particles being obtainable by polymerizing a foamed monomer solution or suspension, drying the polymeric foam and grinding the dried foam.

主权项

1. A method of dewatering feces, comprising contacting the feces with water-absorbing polymer particles obtained by foaming, then polymerizing, an aqueous monomer solution or suspension, the aqueous monomer solution or suspension comprising
a) 20% to 90%, by weight of at least one ethylenically unsaturated monomer which bears an acid group and has been neutralized to an extent of 25 to 95 mol %, b) 1% to 10%, by weight of at least one crosslinker based on unneutralized monomer a), c) at least one initiator, and d) at least one surfactant, then drying the polymeric foam and grinding the dried foam, wherein a foaming agent used to foam the aqueous monomer solution or suspension is an inert gas, and wherein the water absorbing particles have a fecal densification rate of at least 0.2 Ncm/s.