7 Stage Reverse Osmosis

What Do I Need to Know Before Purchasing a Reverse Osmosis System?

What Do I Need to Know Before Purchasing a Reverse Osmosis System?

So, you've decided to get serious about researching Reverse Osmosis Systems before making a purchase. Perfect. Here are some more things to consider:

  1. Do I need to buy a tap? RO systems require a separate tap for the treated water to dispense. Did you know you can upgrade your RO faucet to match the colour, finish and style of your existing kitchen sink fixtures?
  2. Wondering how many stages of filtration an RO system should have? RO systems typically come in 5, 6 or 7 stages of filtration. At least 5 stages is typically recommended for most applications.   Our 6 stage system adds a re-mineraliser to which enriches water with elements such as calcium and magnesium.   Our 7 Stage system adds a further Ionizing cartridge to this process.
  3. If you're on well water or an area with high levels of sediment, you may want to consider a system that has extra pre-filtration (5 stages). Our Aquafilter RO systems will provide adequate filtration for most applications, but you might want to consider an additional pre-filtration system.
  4. What about water hardness? Does incoming water have a hardness level above 7 grains per gallon (gpg)? Keep in mind that an RO system is not a water softener and if your water is above 7 gpg hardness, water softener pretreatment will help preserve the life of an RO system and membrane, although not required.
  5. Does an RO System Waste Water? Similar to how we use water to wash our dishes, clothes or vehicles, RO technology uses water to clean the RO membranes as they process water. During the filtration process, RO systems typically use more water than the filtered water it produces. But because the system shuts down once the storage tank is full, water does not continue to run down the drain. Some systems are more water efficient than others. If this is a concern, check out the APURE SENNA nero Reverse Osmosis System.
  6. How much water can a system produce? Expect a GPD (gallons per day) production rate of 50% to 75% of system GPD rating. While it's true that no one really uses 50+ gallons of drinking water per day, the “50 GPD rating” is the speed that an RO system makes drinking water and actually produces a gallon of water per hour (with normal water pressure of about 60 psi). Thus, a 50 GPD-rated system will provide adequate production for the common household and will not cost much more than a lower GPD-rated system.
  7. Would you like RO water for your ice maker? Add a refrigerator icemaker adapter kit to easily get RO water from your icemaker. You'll no longer need to buy a separate refrigerator filter.

What's our most popular RO system? The most common system purchased by customers is the Aquafilter 7 Stage Reverse Osmosis System due to great value, made in the EU, simple installation, and quick release filters for easy filter changes.

Aquafilter 6 Stage Pumped Reverse Osmosis System

Aquafilter 6 Stage Reverse Osmosis System with Mineralizing Cartridge

Aquafilter 6 Stage Pumped Reverse Osmosis System

Aquafilter 6 Stage Reverse Osmosis System with Mineralizing Cartridge with pump

7 Stage Reverse Osmosis

Aquafilter 7 Stage Reverse Osmosis System with Mineralizing Cartridge

Smolt plant invests in sludge drying

Ranfjord Fiskeprodukter will invest about 20 million NOK in sludge treatment at its smolt plant in Mo i Rana. The environmental investment is made to meet public requirements. It is the sludge from the filtering of the effluent which will be dewatered and dried.

The process solution consists of thickening, dewatering and evaporation. In practice, zero effluent will be obtained from the sludge treatment itself. This is accomplished by purifying the rejection water from the sludge thickening by ultrafiltration.

“Using this sludge treatment, we achieve an overall lowering of our effluents, thus fulfilling public requirements,” says Bjørn Myklebust, managing director at Ranfjord Fiskeprodukter.

At the same time as the investment meets environmental concerns, the sludge will be dried to 90% dry matter.
“It is important for us to get a dried and stable end product. At the same time we use a drying process that is gentle on the nutrients in the sludge, so that it can become the most useful fertilizer product. The aim is to contribute to a circular solution, where waste from fish farming will play a part in agriculture,” says Myklebust.

The drying process utilizes heat pump technology. The process includes several stages where a special Norwegian-developed onion thickener gives a very effective thickening.

The complete sludge treatment plant will be delivered by Sterner and the design basis for the plant is 600 tonnes of fish feed per year.
“We chose the solution after seeing similar plants in operation,” says Myklebust.

The actual sludge treatment accounts for half of the total environmental investments. Sterner has so far delivered 12 sludge treatment plants to the aquaculture industry and besides also works with the production of biogas from corresponding sludge.

Ranfjord Fiskeprodukter AS is located at Mo Industripark, about 2 kilometers from Mo i Rana center. An annual 5.5 million smolt is produced, from 2 plants in the industrial park. The business is owned by fish farmers and has 10 employees.