Blog

Home » Blog » Different types of non electric gravity based water filters and their evaluation

Different types of non electric gravity based water filters and their evaluation

Posted on February 11, 2016 Different types of non electric gravity based water filters and their evaluation

In this article we will talk about non-electric gravity based water filters, their types, their advantages and disadvantages.

Gravity based filters work on the gravitational force from higher compartment to lower compartment. You need to pour water from top in the filter; water shall pass through different components like microfiber mesh, activated carbon and chemicals to get filtered. Purified water can be collected at the bottom of the filter. In this process no external force is used other than gravitation force. There are two types of gravity based water filters

  • Basic gravity filters
  • Chemical based gravity filters

Basic Gravity Ceramic Candle Filter

The use of ceramic material for the filtration of drinking water is one of the oldest drinking water treatments. At one time, the ceramic candle filters and the colloidal silver were the most widely used.
Ceramic candle filters are simple devices made out of clay and used to filter drinking water in order to remove turbidity, suspended materials and some large bacteria. Removal takes place by a physical process such as mechanical trapping and adsorption on the ceramic candles, which have micro-scale pores. Water is poured into the upper of two container and flows through a candle situated in the bottom. Once the water has passed through the candle, it is collected in the lower container. This system both filters the water and provides storage until it is used. The filters are easy to assemble and no energy is required. Maintenance includes frequent scrubbing with a brush and proper care during transport and its use.

The devices consist of two compartments, which allow simultaneous filtration and storage of the filtered water.Outer and inner view of common stainless steel candle filter.

370310140_LX.PT02

Advantages of Basic gravity filters

  • Cheap, simple and easy to use and clean.
  • Removes turbidity and suspended solids
  • Somewhat effective for the removal of large bacteria
  • Improves clarity of water.

Disadvantages of Basic gravity filters

  • Does not remove harmful disease causing micro- organisms.
  • Does not remove chemical contaminants and color.
  • Highly turbid or iron containing water clogs the candle pores.
  • Low flow rate.
  • Require to boil after filtration to get purified water.

Gravity based filters with chemical capsules

 Chemical filters overcome the drawbacks of basic gravity filters. Chlorine is used for removing bacteria and other microorganisms from water. At the beginning, water is passed through a microfiber mesh or through a membrane which will eliminate suspended solids from the water. Predefined quantity of chlorine is then added to this water to kill microorganisms present in the water. Excessive chlorine present in the water needs to be removed therefore it is again passed through an activated carbon filter as activated carbon shall remove the chlorine from water to the consumable levels.

Maintenance cost of Gravity based filters with chemical capsules

For a family of four, maintenance cost can go up to 1600/- Rs. to 2000/-Rs. yearly on the maintenance. A chemical battery along with a carbon filter with 1500 Ltr purification capacity may cost up to 600/-Rs. and fiber mesh costs approx 150-200 Rs. A family of four might need 12 to 15 Ltrs of purified water every day for drinking and cooking. Therefore one battery of 600/- Rs. can last only for 4 months.

Advantages of chemical gravity filters

  • Easy to use.
  • Removes turbidity and suspended solids, organic pollutants.
  • Removes harmful bacteria & viruses in water
  • No electricity, No boiling of water.

Disadvantages of chemical gravity filters

  • Premature clogging of the filters leads to lack of flow & higher maintenance costs.
  • Activated carbon can get saturated and clogged, and then it won’t remove chlorine further.
  • Require regular cleaning to prevent tank recontamination.
  • The chemical batteries and activated carbon filter and both need to be replaced at regular intervals leading again to high maintenance costs.

 

Related Products:DewDrop RO purifier

Connect with us


Facebook

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

  • Air Disinfection

    Air Disinfection

    Ultravoilet UV air purification systems for...Read More

Latest Blog
Save Energy by UVGI System
Jan
13

Save Energy by UVGI System

What is a UVGI System? UVGI System (Ultraviolet Germicid... Read More

To understand which is the best water purifier for Mumbai, check out these 4 needs
Oct
21

To understand which is the best water purifier for Mumbai, check out these 4 needs

  Hello Mumbaikar, looking for the best home water purifier... Read More

When to replace RO (Reverse Osmosis) membrane in my RO water purifier ?
Sep
22

When to replace RO (Reverse Osmosis) membrane in my RO water purifier ?

Reverse osmosis ( RO) is one of the most effective technolog... Read More

Are there minerals in your purified water ?
Aug
31

Are there minerals in your purified water ?

Water is a universal need. It is also a natural source of mi... Read More

What is the average life of water purifier ?
Jul
29

What is the average life of water purifier ?

How to improve the average life of home water purifier ? Wa... Read More

Boiling water Vs. Water Purifier
Jun
21

Boiling water Vs. Water Purifier

Boiling water or water purifier? Boiling water is the oldest... Read More

Preventive measures for water related and waterborne diseases
Jun
15

Preventive measures for water related and waterborne diseases

Waterborne Diseases and its prevention Monsoon is around the... Read More

Copyright © 2015 Alfaa UV. All Rights Reserved   |   Designed by Capsicum Mediaworks
We Support
Water Quality association Made In India Swachh Bharat