1
Hendrik Kruidhof: Method for dephosphorizing pig manure. Ceres Milieu Holding, Webb Ziesenheim Logsdon Orkin & Hanson P C, November 30, 1999: US05993503 (22 worldwide citation)

The invention relates to a method for dephosphorizing manure, in particular pig manure, comprising of causing phosphate to dissolve, which phosphate is present at least partially in the form of phytate in the manure, separating the manure into a solid and a liquid fraction and removing the phosphate ...


2
Arian Nijmeijer, Hendrik Kruidhof, Hendrik Verweij: Separating device comprising a ceramic membrane. Universiteit Twente, Webb Ziesenheim Logsdon Orkin & Hanson P C, October 14, 2003: US06632360

A device for separating liquid and/or gas components from each other, which device includes a ceramic membrane comprising a porous layer of &ggr;-alumina which is present on top of a porous layer of supporting material, wherein an alkali-free, phosphorous material is provided between said supporting ...