A composition for cleaning membranes used in food processing comprising an amine oxide and an alkyl sulfate, the composition maintaining good cleaning performance whilst leaving a low residue of surfactant on the membrane that is cleaned using the composition. A method of use of the composition is also presented.

A cleaning-in-place method for cleaning a membrane filter module, the membrane filter module including a membrane having a feed side and a permeate side and being configured to filter a fluid passing through the membrane from the feed side to the permeate side; wherein the method comprises performing a sequence of process cycles, the sequence comprising at least one monitored process cycle, the monitored process cycle comprising: providing a flow of a liquid through the membrane and/or across the feed side of the membrane; monitoring at least one hydraulic parameter associated with the provided flow of the liquid; and terminating the flow of the liquid, when the at least one monitored hydraulic parameter meets a predetermined cycle completion criterion.

A composition for cleaning membranes used in food processing comprising an amine oxide and an alkyl sulfate, the composition maintaining good cleaning performance whilst leaving a low residue of surfactant on the membrane that is cleaned using the composition. A method of use of the composition is also presented.

A water treatment system for delaying nanofiltration membrane aluminum fouling, including an ultrafiltration system and a nanofiltration system. The ultrafiltration system includes a first water supply sub-system, an ultrafiltration membrane group and a first water production sub-system sequentially in pipeline connection. A first dosing pipeline is provided between the first water supply sub-system and the ultrafiltration membrane group, and has a dosing port for adding a first scale inhibitor. The nanofiltration system includes a second water supply sub-system, a nanofiltration membrane group and a second water production sub-system sequentially in pipeline connection. The second water supply sub-system is communicated with the first water production sub-system. A second dosing pipeline is provided between the second water supply sub-system and the nanofiltration membrane group, and has a dosing port for adding a second scale inhibitor. A control method for delaying nanofiltration membrane aluminum fouling of a water treatment system is also provided.

A water treatment system for delaying nanofiltration membrane aluminum fouling, including an ultrafiltration system and a nanofiltration system. The ultrafiltration system includes a first water supply sub-system, an ultrafiltration membrane group and a first water production sub-system sequentially in pipeline connection. A first dosing pipeline is provided between the first water supply sub-system and the ultrafiltration membrane group, and has a dosing port for adding a first scale inhibitor. The nanofiltration system includes a second water supply sub-system, a nanofiltration membrane group and a second water production sub-system sequentially in pipeline connection. The second water supply sub-system is communicated with the first water production sub-system. A second dosing pipeline is provided between the second water supply sub-system and the nanofiltration membrane group, and has a dosing port for adding a second scale inhibitor. A control method for delaying nanofiltration membrane aluminum fouling of a water treatment system is also provided.

A treatment method for a waste aqueous development liquid generated through development of a flexographic printing original plate by using an aqueous development liquid, the method including: a first filtration step of filtering the waste aqueous development liquid at 5 C. or more and 48 C. or less through a microfiltration membrane to give a recovered liquid and a concentrated waste liquid; and a reuse step of reusing the recovered liquid for development of a flexographic printing original plate.

The present disclosure relates to biocide compositions, formulations and methods for using formulations. In particular the present disclosure relates to biocide compositions and their use in treating reverse osmosis membranes.

Embodiments of the present disclosure generally relate to methods for treating porous membranes. In an embodiment, a method of treating a porous membrane is provided. The method includes flushing the membrane with a first fluid comprising a hydroxide ion and hypochlorite ion, flushing the membrane with water, flushing the membrane with a second fluid comprising an organic peroxide, organic peroxide ion, or both, and flushing the membrane with water.

The present invention relates to a chemical product and process for cleaning nanofiltration and reverse osmosis membranes, based on enzymatic action aiming to remove biofouling and inorganic scale quickly. The product mentioned in present invention also proposes elimination of the neutralization step of the chemical product used, given that the enzymatic action allows an adequate pH for disposal to be maintained, which fact increases the speed and efficiency of the process.

A method for cleaning a filter includes flowing a cleaning fluid through a filter housing to clean the filter in the filter housing and obtaining flowing parameters of the cleaning fluid. The method further includes determining a condition of the filter based on the flowing parameters of the cleaning fluid, and associating the flowing parameters to attributes of the filter when the condition of the filter is clean.