Harn R/O Systems Blog

Water Recycling on the International Space Station

Posted by Julie Nemeth-Harn on Jun 1, 2020 9:00:00 AM

Going into space takes a lot of forethought. Astronauts may seem super human, but the fact of the matter is they need the same things everyday people need. That includes water. The International Space Station is a completely closed system that needs to be able to operate without outside interference. It would be very hard to deliver necessities to the station on a regular basis, especially things that are constantly used, like water.

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Topics: water treatment

How to Calculate Percent Recovery and What Affects it in a Membrane Treatment System?

Posted by Julie Nemeth-Harn on Mar 30, 2020 1:10:00 PM


Recovery is the amount of water permeated per unit time - usually in gallons per minute (gpm) and expressed as a percentage of the raw water feed flow rate. The design recovery is calculated as follows:

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Topics: membrane filtration, membrane treatment system, membrane treatment, water treatment, membrane plants, water quality, ro calculations

How Much Water on Earth is Drinkable?

Posted by Julie Nemeth-Harn on Mar 17, 2020 1:30:00 PM

Water is one of the most important commodities that supports life on earth but very few understand how hard it is to get clean, potable freshwater. Water, in all its forms, covers three quarters of the Earth's surface. The water levels on Earth remain relatively the same each year. Every day, water goes through a cycle that sees it flow from land, to the seas and then evaporates into the atmosphere through the processes of evaporation and precipitation.

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Topics: membrane filtration, membrane treatment system, reverse osmosis, membrane treatment, water treatment, clean drinking water, membrane plants, water recycling, water quality, water purification process, save water

5 Ways to Save Water and Save Money During Restricted Water Usage

Posted by Julie Nemeth-Harn on Feb 28, 2020 10:46:00 AM

With growing worries about water scarcity, the need for businesses and homeowners to conserve water is becoming more and more evident. Fortunately, many of the ways that you can save water on an individual basis are free or inexpensive. Furthermore, almost all of them are relatively easy to implement. Consider the following ways to save both money and water:

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Topics: membrane filtration, save water, save money

What is the Reverse Osmosis Equipment Manufacturer's (ROEM) Role in Membrane Water Treatment?

Posted by Julie Nemeth-Harn on Feb 14, 2020 11:00:00 AM

In conventional construction projects there are three main parties: the water treatment plant owner, the engineer, and the contractor. In specialized process projects a system supplier with particular expertise on the process is also usually involved. This party is also called an Original Equipment Manufacturer (OEM). For membrane treatment projects this entity is commonly called the Reverse Osmosis Equipment Manufacturer (ROEM) or the Membrane System Supplier (MSS). The ROEM or MSS may have a separate contract with the water treatment plant owner, or they may be a subcontractor to either the engineer or the main general contractor.

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Topics: membrane treatment system, reverse osmosis

How Global Warming and Climate Change Presents Major Water Treatment Challenges

Posted by Julie Nemeth-Harn on Jan 31, 2020 10:48:00 AM

The effects of global warming and climate change are continuously being felt on the earth. In fact, we are expected to experience a 2-5 degrees Celsius increase in global temperatures within the next 30 years. An effect of climate change that often gets overlooked is its impact felt on water treatment processes.

Climate change poses major challenges to the effective treatment of water. Some of these challenges include inundated water supplies that lead to higher levels of contaminants in the water, pressure on the operation of current water infrastructure, and the effect of inclement weather on water systems.

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Topics: membrane treatment, water treatment, global warming, climate change