A Quick Useful Guide On How To Remove Nitrate From Water
Nitrate contamination occurs in the underground water mainly for using fertilizers and unrestrained land emancipations of treated wastewater. This has a very great effect on the pregnant women and infants.
So measures have been taken for limiting the direct utilization of underground water for human consumption in the various parts of the world including India.
There are some traditional ways to remove nitrate from water that is ion exchange, reverse osmosis and electrodialysis.
The utility of the systems has limited for the expensive operation and after that disposal problem of generated nitrate waste brine.
In the paper, there is lots of comprehensive account of methods to remove nitrate from water.
Over the last ten years, having a special reference of biological gentrification and the fortune of the metal in decontamination systems are becoming very popular.
Why are nitrate levels important?
For the health and wellbeing of the fish in aquariums, nitrate levels should be controlled to the extreme levels.
They may lead to fungal infections and bacterial infection. Fin-rot, White spots and some other diseases which take the merit of compromised immunity are now great consideration for us. The high level of nitrate also is the cause of excessive algae growth.
The tolerance level of nitrates except ill effects vary from species to species, but the normal level should keep low as much as possible: below 40ppm is better and the best is below 20ppm. Some species need a lower threshold for nitrates.
Fancy Goldfish needs very low nitrates below 20 mm, and higher amount may cause buoyancy problems that are done wrong for Swim Bladder Disease. Fish needs low nitrate acceptance care sheets for the species indicate it.
To see the nitrate level, you can use an aquarium nitrate test weekly so that you can take ready action if the level rises.
How do I know if the nitrate level of my water is too high?
If you see the reports of high nitrate issues in the news or you have learned about it from your neighbor well water, you must not be surprised.
To know the high level of nitrate, you may wonder. Nitrate is also odorless, colorless and tasteless.
You will know about the high level of nitrate in your water above the maximum level when you test it. The professionals of your local area can determine it by undertaking such a test.
If you get water from a municipal water treatment plant, municipal water treatment plant, municipalities should treat or test water within EPA guidelines to test contamination level.
The pipe that supplies water to your home is the biggest culprit to increase nitrate levels. This is the view of the World Health Organization:
Nitrate may be formed chemically inside distribution pipes by Nitrosamines bacteria during oxygen-poor drinking water in galvanized steel pipes, stagnation of nitrate containing or chlorination is applied to give a residual disinfectant. The system is not well maintained.
Moreover, many households in the US are not city water. Instead, they use well water and have no idea of nitrate level of their good water.
Treatment for Nitrate
If the water supply contaminants with nitrate, treating is very costly. If you like to treat large quantities, you have to convene drinking water need that is costly.
Reverse osmosis, ion exchange units, distillation all systems eliminate nitrate from the drinking water.
Be sure; boiling water fails to remove nitrate and is not a good treatment alternative. It develops nitrate concentration when water evaporates.
Do Not Boil – This will fix the contaminant
The most common method of removing nitrate from water in the household is to treat water with the point by reverse osmosis.
You may set the reverse osmosis drinking water systems under the sink or inside a mechanical room, ensure treated water to a particular faucet, ice maker or fridge.
In this technology, water passes through a series of filters and one of which is Reverse Osmosis Membrane.
This membrane normally removes impurities from water, especially nitrates. The fresh pure and good water send to the storage tank. It is safe to use.
An ion exchange system works just like a family water softener. The task of a softener is to remove magnesium and calcium-laden water by a resin covered with sodium ions.
When water goes through this unit, the resin emits sodium ions and willingly trades them for magnesium and calcium.
To remove nitrate, the resin shares chloride ions for sulfate and nitrate ions in the water. When it treats many gallons of water, the resin may run out chloride.
Regenerating the resin by the rigorous solution of sodium chloride recharges it for more treatment. It is shown in figure 1. Here you will get the details how ion exchange system works.
There are drawbacks of ion exchange. The reasons are the resin like to absorb sulfate, water having sulfate prevents nitrate exchange and lessen the system’s effectiveness.
When resin becomes saturated, it emits nitrates in place of sulfates. The result is the increase of nitrate concentration in treated water.
Besides, the nitrate ions exchange makes water corrosive. When water gives up the unit, if you neutralize water, the effect may be less.
Lastly, ion exchange needs maintenance that is very expensive. As the backwash brine may be high in nitrates, care can be prearranged to this disposal.
Reverse Osmosis is the other way to treat water. Since water goes to the unit by applying pressure, it pushes before cellophane like cellulose or plastic sheet.
It is also known as a Semipermeable membrane. This membrane does work like a sieve and keeps ion such as nitrates on the side and ensures ion free water passes inside the membrane.
Some membrane filters the water is measured by rejection rate. Now the question how much nitrate can the membrane reject?
The assumption is 83 to 92 percent of the incoming rate. To know the real nitrate concentration is a great factor.
If you see the levels are very high, it is possible to remove up to 90 percent.
The remaining nitrate-nitrogen will result in the drinking water which crosses the margin of 10mg/1 nitrate-nitrogen.
Distillation is a very popular way to remove minerals and other compounds from the water. Water is condensed, cooled and boiled.
This water will be free from salts, solids, and heavy metals. Anything may not volatilize. Boiling water also inactivates microorganisms.
There are some limitations of distillers. Distillation is a slow process as the reverse osmosis.
A suitable type of home unit produces a gallon of fresh water after every 4 or 5 hours. It has much energy and made heat which tax air conditioners for the summer months.
For per gallon of water you have to spend energy cost about 30 cents. Finally, the unit needs frequent cleaning to eliminate accumulated scales.