28871 ⎘
Filters comprising loose filtering material, i.e. filtering material without any binder between the individual particles or fibres thereof with the filter bed stationary during the filtration the filtering material being provided in an open container; Upward filtration the container having distribution or collection headers or pervious conduits
Apparatus and method to prevent downward flow of liquid during a gas only washing cycle
#2Combined device for sewage deep treatment and treatment method
#3Underdrain and method for transferring forces and directing flow
#4Gas-liquid distribution technique for water or wastewater filters using underdrains
#5Scale prevention for aircraft water system
#6Wastewater treatment unit