Comparing Water Purification Systems: Mitte Home & Other Water Filters


There are a myriad of at-home water purification systems available on the market. They boast different features, varying levels of effectiveness, a range of costs, and reliability in long-term performance. 

We’ve compared some of the most popular water purification systems alongside the Mitte Home. 

Mitte Home

Mitte Home is a highly complex and sophisticated water maker, fundamentally inspired by the natural water cycle, that is capable of not only filtering water but likewise mineralizing it. Mitte Home creates purified, mineralized water from tap water, in just sixty seconds. 

The input water is primed for mineralization with the addition of small amounts of CO₂ in order to acidify it. This is our proprietary mineralization technique which allows the minerals to be fully dissolved in the water. 

The Mitte Home cartridge is composed of a two-step process of microfiltration and active carbon adsorption technology. 

In the first step, the water goes through an activated carbon filter, derived from coconut shells, which is the most renewable type of filter media. Carbon filters remove contaminants through adsorption, soaking them up much like a sponge. The contaminants stick to the surface of the carbon filter because water and contaminants are polar compounds attracted to one another. The porous nature and large surface area of carbon filters make them very effective a reducing bad taste, odors, and particles. 

The second physical filtration step in Mitte Home uses a high-quality, hollow fiber filter. Inside this filter are hundreds of tiny tubes bundled together. The tube walls are made up of microscopic pores which are large enough for water to pass through, but small enough to stop any pathogens. When the water gets pumped through, the contaminants get trapped in the tubes. The hollow fibers function much like a sieve that strains out contaminants. This also means that their functionality is not affected by the presence of other water contaminants or any variations in pH levels, salts, and water temperature, which makes them very distinct from other filters that are to some degree impaired by these qualities.

Together these two filters reduce up to 99,99999% of bacteria as well as heavy metals, such as lead, cadmium, chromium, mercury, as well as chlorine, pathogens, such as E. coli, as well as cysts, microplastics, and even nanoplastics down to 0.2 µm–– that is 100x thinner than a human hair!

Each cartridge delivers 250 liters of Mitte Water before it needs to be replaced by a new one. 

Mitte Home at-home water maker filtration, mineralization, carbonator

Let’s now take a look at other purification technologies.

Pitcher filters for tap water

There are two types of pitcher filters: Activated carbon (AC) and Ion exchangers (IX) water softener. 

The primary purification mechanism of activated carbon (AC) uses any carbon-containing source as a base material. This can be charcoal of any type, for example, coconut husks.

In water treatment activated carbon commonly comes as either granules or blocks. What all types of AC have in common is that they possess a large inner surface area, where contaminants can be bound through a process called adsorption. Activated carbon adsorbs a wide range of molecules and ions. 

AC is a very valuable water treatment as it has a higher affinity towards organic compounds and heavy metals that are considered drinking water pollutants than for the important macro minerals like Calcium, Magnesium, Sodium, and Potassium.

AC in block form also works as a filter for coarse material like iron, copper or lead-containing particles that may come from the water installation.

More common than AC among pitcher filters are Ion exchangers (IX). They are effectively used to soften hard water by swapping out the magnesium and calcium ions found in hard water with other ions, such as sodium, using an ion exchange resin. This technology does not remove bacteria and viruses, pharmaceuticals, and suspended solids. 

While neither has any energy requirements, both kinds of pitcher filters need to be replaced frequently.

Ultraviolet (UV) Treatment

Here water passes through a quartz tube that is irradiated with UV radiation from a UV lamp. UV radiation kills water-borne bacteria, viruses, and other pathogens by destroying their DNA or RNA, but their dead bodies remain in the water.
UV treatment does not remove coarse particles, salts, volatile organic compounds (VOCs), nitrates, nor heavy metals.

The system can cost anywhere from ​​$50 to $650 and the UV lamp requires regular replacement. The quartz glass tubes also need to be cleaned to remove scale and other deposits.

Ultrafiltration (UF) System

UF is a type of physical filtration. It uses a membrane to separate the suspended particles from water. The membrane is similar to that used in reverse osmosis, but with larger pore sizes.

It removes bacteria, viruses, proteins, and macromolecules larger than the membrane pore size but allows passage to dissolved salts, heavy metals, and VOCs.

Reverse Osmosis Filtration 

RO uses a semipermeable membrane that removes dissolved and suspended impurities. High pressure is applied on one side, forcing the water across the membrane and moving from an area of higher impurity concentration to that of a lower one. RO removes most of the minerals, VOCs, viruses, and bacteria from water.

RO is fairly expensive with systems costing up to $2,000. It also takes between 15 – 20 minutes to produce a single liter of filtered water. 

Breakages in the membranes, unfortunately, are not easily detected, thus RO requires regular replacements. RO removes the beneficial natural minerals from the water alongside contaminants. Plus, as it rejects around 50-60% of water during the filtration process, it creates big quantities of wastewater. 

By Natalia Kvitkova — Nov 5, 2021
The information contained in this article is provided for educational and informational purposes only, and should not be construed as health or nutritional advice.

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