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Industrial RO water purifier and their maintenance process

  • July 25, 2021
  • 6 min read

Most of industries need huge amount of water for their daily operations like washing, fabricating processes, cooling, diluting, cleaning and many more operations. As industries are required large quantity of water for its daily process, most of time the supplied water contain high level of impurities.

Some industries like food industry and chemical industry required pure water for its processes. To purify the supplied raw water different water treatments can be used like UF purification, RO purification, UV purification and many more. Industrial RO purifier is one of the most trusted water sanitization methods for industry in these days. This article provides detailed descriptions about industrial RO and the repairing services.

Reverse Osmosis (RO):

Reverse Osmosis is simple water sanitization method used for the domestic and industrial purposes. Its filtration process takes place with the help of water press. Raw water need to pass through semi permeable membrane of industrial RO system to purify the industrial water.

This process removes all kind of dissolved impurities from the water like salt fluoride, lead, pesticides, chlorine and chloramines, nitrates and sulfates, detergents, etc. It is very easy to conduct the Industrial RO Repair as many service providers are available which offers services in reasonable cost.

Pre-filters of Industrial RO system:

Almost all the industrial RO purifiers are having the pre-filtration systems listed below. These pre filtrations methods can improve the life span of the RO membrane.

Pre filtration is necessary to prevent the RO water purifiers from the different problems like scaling and fouling. Industry standards suggest customer to make use of 5 micron pre filter to RO system for the better performance of system. It contains different membrane which filters the incoming water. Membrane can be defined as thin, pliable or semi-permeable material which is used to separate dissolved impurities or containments from fluid water.

  • Macro filtration membrane:

It removes the unresolved and non colloidal elements from the water which sizes 1.0 micron or larger than that. Microfiltration is most commonly used filtration membrane is used for filtrating water.

  • Micro filtration membranes

It removes the colloidal, viruses and bacteria matters from the impure water. Typically the pore size of micro filtration membrane is 0.1 – 10 µm.

  • Ultra filtration membrane:

This removes the remaining containments which micro filtration membrane cant eliminates. This can remove the particles 0.01 to 0.1 microns which can be suspended solid or bacteria, endotoxins, silica and salts or proteins.

  • Nano filtration membrane:

This membrane removes the contaminants which ranges around 1 nanometer i.e. 0.001 microns from the water. This is last pre filtration membrane of industrial RO system. It can filter different containments like sugar, salts, synthetic dyes and multivalent ions with the increase in the osmotic pressure.

After all this pre filtration membrane, the hyper filtration or reverse osmosis (RO) takes place. To minimize the charges of Industrial RO Purifier Repair Services, user can install the pre filtration membranes above the RO membrane. Installation of this pre treatment membrane can also prevent fouling, scaling, chemical attack, mechanical damage to the RO water purifier.

Common RO problems:

If customers are unable to provide the proper pretreatment to RO water purifier it can goes through the common problems listed below.

  • Scaling:

Sometimes there can be disposition of inorganic compounds on the surface of the RO membrane which can cause the plugging of the membrane.  Scaling of membrane can happen during the nano filtration process. During scaling the higher energy is utilize and reduces life of the membrane.

Adding acids or anti-scalents and the scale inhibitors to the industrial RO system can prevent the scaling. It increases the solubility capacity of the inorganic compounds which provides highest recovery rate of the system.

User can select the best anti scalars and inhibitors depending upon the feeding of supplied water and the design of your industrial RO water purify.

  • Fouling:

In the fouling effect, the contaminants are suspended on the membrane surface and plugging it effectively. Customers who are feeding municipal water to RO system can experience the fouling effect many times to their RO system front end.

Fouling causes the higher pressure drop and less flow of permeate water from the system. Fouling can cause the higher repair service cost and customer need to replace the RO membrane may times.

There are certain reasons of the fouling some of them are given below.

  1. Colloidal contaminants of water like dirt, slit, and clay.
  2. Organic elements.
  3. Presence of microorganisms like bacteria in the supplied water. This is the most common problem which can cause fouling as RO membrane used are unable to prevent the disinfectants like chlorine.

Customer can make use of multimedia filter (MMF) to avoid the effect of the fouling.MMF or micro filtration is having three layers of media including coal, sand and garnet with the gravel layer at the bottom.

This eliminates the larger dirt particle at the top layer and the smaller dirt particles in the deeper level.

The effective multimedia filter can eradicate particulates down the 15 to 20 microns.

  • Chemical attack to membrane:

The thin film of membrane used in these days is unable to bear elements like chlorine and chloramines. This can burns the RO membrane pores and may leads to chemical damage to RO membrane.

Typically the effects of chemical attack are the high permeate flow with the poor quality and large salt passage in the RO system.

  • Mechanical damage to RO membrane:

Large back pressure to the RO system can often leads to irreparable mechanical damage to the RO system.  Customer can control the back pressure with the use of inconsistent frequency drive motors or the pressure the relief valves to the RO system.

Maintenance of RO membrane:

All the RO membranes predictably need to periodic sanitization or cleaning. For the excellent quality of water user need to clean the RO membrane at least 1 to 4 times in the year.

If user experiences the decreases in pressure, flow of permeate water is decreased by 15% or the passage of normalized salt is increased by 15% then it is time to clean up the RO membrane.

User can do the maintenance of the RO membrane at home/office or call for the Industrial RO Purifier Repair Service Providers which are experienced in providing all the maintenance services of the RO system.

In the process of RO membrane cleaning, user can use low and high pH cleaners which can help to remove the contaminants from the RO membrane. Low pH cleaners are typically used for scaling whereas high pH cleaners are used for eliminating organics, colloidal and befouling from the RO membrane.

Apart from the pH cleaners user need to consider different other factors like water flow, temperature of pure water and quality of the water while cleaning the RO membrane. Generally the temperature of water is increased as the pressure of RO membrane gets increased.

Customer can also run the maintenance work with the use of water softeners, sodium bisulfate injection or SMBS and granular activated carbon (GAC). In this way the industrial RO water purifier can provide pure water to industry for many years with less repairing cost if it is properly maintained.

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