Abstract: The method is used for performing a cleaning operation on a water filtration device having an inlet, a concentrate outlet, a permeate outlet, a filtration membrane between the inlet and the permeate outlet, the filtration membrane filtering water under pressure during a filtration operation of the water filtration device, and a recirculation line leading from at least one of the concentrate outlet and the permeate outlet back to the inlet. The method generally has a step of performing the cleaning operation including recirculating a solution along the recirculation line, the solution having at least water and one cleaning agent, the step of recirculating including maintaining a circulation of the solution along the entire length of the recirculation line.

Abstract: The disclosure aims at improving the strength of a bag for the packing of products such as moist towelettes. For this purpose, the invention provides to add an upper gusset linking the front and back faces of the packing back and to make integral the flap with such upper gusset through an opening provided on the front face of the packing bag. According to one exemplary embodiment, the packing bag having the general shape of an envelope, more particularly including a back face and a front face, the front face being provided with a dispensing opening which can be closed by a flap, the upper edges of the back and front faces being sealed on the internal layer of an upper gusset, said upper gusset, the flap and the front face being integral. Besides, the upper edge of the front face has at least one cut through which at least a part of the internal layer of the upper edge of the flap is sealed on a part of the internal layer of the upper gusset.

Abstract: One or more aerators move below an area of an assembly of immersed filtering membranes to be aerated. The movement can take various forms including the sweep of a pendulum. Positions in the assembly of membranes may be alternately aerated for a period of time and then not aerated for a period of time.

Abstract: An element of immersed, suction driven, filtering membranes has a plurality of hollow fiber membranes suspended between upper and lower headers. The lower header is movable between a first position in which the fibers are substantially elongated and second position in which the two headers are closer to each other by between 1 and 4% of the un-potted length of the membranes. The weight of the lower header is sufficient to keep the lower header in the first position in substantially quiescent water while allowing the lower header to rise to the second position in upwardly flowing water. Aerators are mounted generally below the elements and supply scouring bubbles to each element at a higher rate and then at a rate less than one half of the higher rate in repeated cycles. The cycles are preferably between 10 seconds and 60 seconds in duration. The lower header rises to the second position when bubbles are supplied at the higher rate and falls to the first position when bubbles are supplied at the lower rate.

Abstract: The invention concerns a case which is opened along a break-off line by pulling on a label capable of being stuck back. The break-off line extends up to the edge of the case front wall. Each item has on its front surface a prehensile corner located in the pile median zone. The prehensile corner of the item located at the top of the pile is positioned opposite the dispensing aperture. The invention is applicable to cases for moist wipes.

Abstract: One or more aerators move below an area of an assembly of immersed filtering membranes to be aerated. The movement can take various forms including the sweep of a pendulum. Positions in the assembly of membranes may be alternately aerated for a period of time and then not aerated for a period of time.

Abstract: An element of immersed, suction driven, filtering membranes has a plurality of hollow fiber membranes suspended between upper and lower headers. The lower header is movable between a first position in which the fibers are substantially elongated and second position in which the two headers are closer to each other by between 1 and 4% of the un-potted length of the membranes. The weight of the lower header is sufficient to keep the lower header in the first position in substantially quiescent water while allowing the lower header to rise to the second position in upwardly flowing water. Aerators are mounted generally below the elements and supply scouring bubbles to each element at a higher rate and then at a rate less than one half of the higher rate in repeated cycles. The cycles are preferably between 10 seconds and 60 seconds in duration. The lower header rises to the second position when bubbles are supplied at the higher rate and falls to the first position when bubbles are supplied at the lower rate.