Blog

Home » Blog » Choosing the Right Method of Water Purification for Your Home

Choosing the Right Method of Water Purification for Your Home

Posted on March 2, 2019 Choosing the Right Method of Water Purification for Your Home

Filtration, ion exchange, separation, and disinfection are four broad categories of technologies available to purify water. Within these, there are further sub-technologies like micro-filtration, ultra-filtration, reverse osmosis, and disinfection. Depending on the water quality, separation (membrane) and disinfection technologies are used to create safe drinking water free from excessive contaminants and salts dissolved in water (TDS) and/ or microorganisms to adhere to WHO standards.

Reverse Osmosis (RO) is an effective way to treat water with higher than permissible levels of TDS, which may also contain substances such as fluorides and arsenic. A high TDS level is normally associated with hardness and an undesirable taste. In many cases, the main driver of RO usage is the noticeable change in taste post-treatment. It has a pleasant taste, akin to bottled water. It is important to remember that most RO membranes reduce TDS by 90%. So if the TDS is 600 mg/ml, to begin with, the treated water will have a TDS of 60. Ideal TDS levels should be in the range of 60-80 mg/ml. Groundwater often contains microorganisms as well, so disinfection post-RO is often good protection. (The primary job of an RO membrane is to separate the dissolved impurities, not disinfect).

When the source of water is surface, filtration and disinfection technologies normally suffice to make the water safe. A chemical-based gravity purifier or a chemical-free UV water purifier does a good job of disinfection. Adding an RO to treat surface water which has low TDS to start with, is normally unnecessary and akin to the antibiotic treatment being administered for a common cold.

Test First

If your source of water is groundwater of unknown chemical composition you are first required to test the water as per IS 10500, which is the Indian standard for safe drinking water. Based on the report the appropriate treatment can be decided. It could be a simple chemical-based gravity filter or a well-designed UV water purifier if the water is chemically potable and just requires to be disinfected or an RO system when water has an excess of dissolved chemicals beyond the permissible range. Normally most people suggest an RO water purifier if your TDS is greater than 500 ppm.

Expert Advice

It is advisable to let a water treatment specialist go through your analysis report and suggest the right method of water purification. The water treatment specialist would be able to suggest any additional pre-treatment, which may be required. For example, excessive iron/ arsenic/ hardness/ fluoride in water may be required to be treated before the RO.

In case there is a reason to suspect microbiological contamination, a micro test in a lab or a home check kit available in the market will reveal if the water is microbiologically unsafe.

Jargon Buster

Next, see what companies are offering. With jargon being thrown at you, check the meaning and implications of systems, which have RO UV, RO UV UF, TDS Controller, etc. Some of these are unnecessary and increase the cost of the equipment and maintenance, without adding any real value.

A TDS controller is nothing but a simple Bypass Valve (bypassing the membrane) meant for controlling the mix between RO water (devoid of minerals) and regular tap water, which contains minerals. This is done so that you are not drinking water with very low TDS. So the question is, did you need to use an RO purifier in the first place?

Consider Implications

Know the pros and cons of each technology. For example, in an RO water purifier, as much as 75-80% of the water is rejected and only 20-25% is used for drinking. In many non-electric, gravity-based storage type water purifiers, chlorine may be the chemical used for purification.

In a UV purifier, know that hard water will not become soft and that the cartridges and UV lamp need replacement at regular intervals, besides regular cleaning. Understand the costs of maintaining each system and cost of consumables.

Calculate pressure

Understanding whether you have sufficient water pressure while using an online water purifier is important. Online water purifiers normally need a pressure of between 10-40 PSI (pounds per square inch) for them to work effectively.

An easy way to calculate the pressure in your tap is to see how many floors you are from the terrace from where water is distributed by gravity. So if you are in a 10 story building and you live on the 8th floor, then your water pressure is likely to be 10 PSI, because every 10 feet from the top is equivalent to 5 PSI. If you live on the first floor, then the pressure in your tap will be around 45 PSI. In that case, a pressure reducing valve may be required along with the online water purifier.

For homes with very low pressure, a booster pump will help or alternately a UV water purifier which works on loft tank pressure can be opted for.

Last Few Words

The quality of water available for consumption varies considerably cross Maharashtra so it’s important to purify it using the right method of water purification before use.

Blog by Rajul Parikh, President of Water Quality India Association and Co-founder of Alfaa UV

 

Connect with us


Facebook

Comments ( 1 )

  • Thanks for this Informative Article regarding the Water Purification.

    Hemant Patel
  • Leave a Comment

    • Drinking water Disinfection

      Drinking water Disinfection

      Ultraviolet UV water purification systems for drinking water disinfection...Read More

    • Process Water Disinfection

      Process Water Disinfection

      Ultraviolet UV water purification systems for process Water Disinfection...Read More

    • Waste water Disinfection

      Waste water Disinfection

      Ultraviolet UV water purification systems for waster water tertiary treatment...Read More

    • Swimming Pool Disinfection

      Swimming Pool Disinfection

      Ultraviolet UV water purification systems for Swimming pool and spas...Read More

    • TOC Reduction

      TOC Reduction

      Ultraviolet UV water purification systems for the Reduction of Total Oxidizable Carbons ( TOC )...Read More

    • Ozone Destruction

      Ozone Destruction

      Ultraviolet UV water purification systems for Ozone destruction...Read More

    • UVGI for HVAC (Air Disinfection)

      UVGI for HVAC (Air Disinfection)

      Ultravoilet UV air purification systems for...Read More

    Latest Blog
    Alfaa UV – Touching Lives Everyday
    May
    22

    Alfaa UV – Touching Lives Everyday

    Alfaa touches your life in many ways. As leaders in UV disin... Read More

    UV Disinfection Technology for Water Treatment
    Apr
    03

    UV Disinfection Technology for Water Treatment

    UV Water Disinfection Technology In  UV water disinfection ... Read More

    UV Water Disinfection Technology for Food and Beverage Industry
    Feb
    20

    UV Water Disinfection Technology for Food and Beverage Industry

    Ultraviolet (UV) light is a potent technology that has been ... Read More

    4 Basic Facts To Understand Before Buying A Water Treatment System For Your Business
    Jan
    31

    4 Basic Facts To Understand Before Buying A Water Treatment System For Your Business

    The market is flooded with different types of water treatme... Read More

    Indoor Air Quality – Everything You Need To Know
    Dec
    24

    Indoor Air Quality – Everything You Need To Know

    When we think about pollutants, we often think about those f... Read More

    WATER REUSE WITH UV DISINFECTION
    Dec
    20

    WATER REUSE WITH UV DISINFECTION

    India is at the threshold of becoming a water scare nation. ... Read More

    HOW DO YOU IMPROVE THE AVERAGE LIFE OF YOUR HOME WATER PURIFIER?
    Dec
    05

    HOW DO YOU IMPROVE THE AVERAGE LIFE OF YOUR HOME WATER PURIFIER?

    Water is a basic necessity for life. With water bodies being... Read More

    All about UV Disinfection Systems for Water Treatment
    Nov
    23

    All about UV Disinfection Systems for Water Treatment

    There are many water treatment solutions available. It can p... Read More

    Copyright © 2019 Alfaa UV. All Rights Reserved   |   Designed by Capsicum Mediaworks
    We Support
    Water Quality association Made In India Swachh Bharat