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Reverse Osmosis UK, Membrane Chemical Treatments

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Membrane Chemical Treatments

Derwent Water Services Limited supplies an extensive range of Chemical Treatment products.

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Membrane Cleaning Compound PC67
For the cleaning of reverse osmosis (RO), nano-filtration (NF) and ultra-filtration (UF) membranes.

Membrane Cleaning Compound PC77
A membrane cleaner specifically developed to remove iron fouling from reverse osmosis (RO) and nano-filtration (NF) membranes.

Membrane Cleaning Compound PC87
A strong mineral acid for the removal of inorganic foulants from reverse osmosis membranes and ultrafiltration.

Membrane Cleaning Compound PC99
Specially developed as an alkaline cleaning formulation for removing organic debris and biofouling from RO and UF membranes.

Membrane Antiscalent PC391
Developed for use in small reverse osmosis systems and has become the preferred method of scale control in thousands of installations.

Membrane Compatible Biocontrol Additive
A fast-acting, non-oxidising, anti-microbial formulation with a broad spectrum of activity developed to control the planktonic and sessile micro-organisms that may form as biofilms on membrane surfaces.

Membrane Cleaning Compound PC33
PermaClean PC-33 is a good general-purpose membrane cleaner designed to support the cleaning of acid-insoluble sulphates of calcium, barium and strontium, as well as calcium fluoride.

Membrane & General Purpose Microbicide PC55
A non-oxidising, non-ionic anti-microbial formulation for use in membranes and pre-treatment plant.

Membrane & General Purpose Microbicide PC56
A preservative for certain types of membranes such as thin film composite and other polyamide-type membranes.

Cleaning Compound For Microfiltration & Ultra-Filtration
Used for cleaning cellulose acetate and polysulphone membranes and has been developed specifically for the elimination of microbial growth and associated organic matter from micro-filtration and ultrafiltration systems.

Membrane Antiscalant for Systems Using Feedwaters With High Levels Of Sulphate
Developed specifically as a calcium sulphate inhibitor, for waters with a CaSO4 Ipb/Ksp ratio of 2.8 to 7.0.

Membrane Antiscalant PC191
A super-threshold agent able to stabilise a wide range of supersaturated salt solutions.

Antifoulant for Seawater systems
An antifoulant for use in reverse osmosis and nano-filtration membrane systems using sea water or high salinity estuarine waters.

Technical Paper Library

 

Glossary of terms


Paper one

The impact of eliminating softeners as pretreatment

Paper two

Membrane pretreatment and scale control

Paper three

Scale inhibition techniques used in membrane systems

Paper four

A statistical review of 150 membrane autopsies

Paper five

Practical experiences of biofouling in reverse osmosis

Paper six

Biofouling in membrane systems

Paper seven

Pre-treatment procedures to control biogrowth and scale formation in membrane systems

Paper eight

Membrane fouling & autopsy

Paper nine

The role of antiscalents and cleaning chemicals to control membrane fouling

Paper ten

Optimising membrane performance

Paper eleven

Recommendations for effective membrane cleaning

Paper twelve

The silt density index explained

Best practices reverse osmosis plant Preservation of reverse osmosis and nano-filtration membranes and systems during system outages
Silica antifoulant for reverse osmosis systems The removal of iron deposition from reverse osmosis membranes
The removal of silts and colloidial fouling from reverse osmosis Cleaning and sanitation of boifouled polymide membranes

 

To view Technical Data pages you will need Adobe Acrobat. Clicking on the image above will take you to the download site.

 

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