Harn R/O Systems Blog

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 RATE

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

Use Variable Frequency Drives to Save Energy in Membrane Plants

Posted by Julie Nemeth-Harn on Jan 17, 2020 1:35:00 PM


Variable frequency drives (VFD) are becoming the popular choice for many industrial processes that need to make use of motors with changing speeds. In membrane plants, these motors are used to feed the pressure and flow of the water as it moves through the various areas of the treatment cycle.

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Topics: membrane filtration, membrane treatment system, membrane treatment, water treatment, membrane plants, vfd, water purification process, save money, water treatment plant

What is Membrane Water Treatment Technology and Why Do We Specialize In It?

Posted by Julie Nemeth-Harn on Sep 6, 2018 10:44:00 AM

Membrane water treatment is a process that removes unwanted constituents from water. A membrane is a barrier that allows certain substances to pass through while blocking others. Water treatment facilities use various types of membranes and processes to clean surface water, groundwater, and wastewater to produce water for industry and for drinking. It is a multi-billion dollar industry that is growing as a result of increasing concerns about contaminants in water and decline in safe, clean, easily accessible existing water sources.

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Topics: membrane filtration, membrane treatment system, reverse osmosis, desalination, clean drinking water

Everything You Need to Know About Membrane Cleaning

Posted by Julie Nemeth-Harn on Apr 18, 2018 11:10:00 AM

During normal operation of an R/O water treatment system, the membrane elements will often suffer a reduction in performance due to the accumulation of small particles, colloids, microorganisms, or precipitated salts collecting on the membrane surface. 

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Topics: membrane filtration, membrane treatment system, membrane treatment, water treatment, save water, save money