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 Oct 5, 2020 1:10:00 PM

Membrane systems operating at 82% recovery will convert 82% of the total raw water input into treated permeate, with the remaining 18% being sent to waste as concentrate (or reject). The recovery rate is monitored using flow meters installed in the permeate and concentrate piping.

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

The Power of Automation in a Membrane Water Treatment Plant

Posted by Julie Nemeth-Harn on Sep 21, 2020 10:15:00 AM


From IT computer server rooms to automotive factories, improved productivity is a reality thanks to modern automation technologies. Membrane water treatment plant operations can be supervised by the same intelligent controls, easy-to-use human interfaces, and industrial SCADA (Supervisory Control and Data Acquisition) systems that are used in other industries.

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Topics: water treatment, design-build

4 Reasons You Need to Replace Your Conventional Water Treatment

Posted by Julie Nemeth-Harn on Sep 8, 2020 11:15:00 AM


Water quality and purification processes have improved greatly over recent years alongside the demand for drinkable water which has also increased. Today’s membrane treatment plants can be tailored to fit specific needs and the membrane treatment methods used can reduce contaminants more than ever before. Where the desired outcome is stable, clean water with an appreciable return on the investment, upgrading to a membrane water treatment system is backed by cutting edge industry science.

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Topics: membrane treatment system, water treatment, water quality, water purification process

Everything You Need to Know About Membrane Cleaning

Posted by Julie Nemeth-Harn on Aug 17, 2020 9:45:00 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

8 Simple Steps for Performing a Successful Membrane Installation

Posted by Julie Nemeth-Harn on Jul 20, 2020 9:00:00 AM

Membranes are loaded from the feed end of the pressure vessel. To better understand the installation procedure, the following definitions are helpful:

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Topics: membrane treatment system, membrane treatment, water treatment, water quality

How to calculate Anti-Scalant Feed Dosage?

Posted by Julie Nemeth-Harn on Jul 6, 2020 10:15:00 AM

There exists a potential for calcium, barium, strontium, fluoride and silica compounds to precipitate in the concentrate or brine channels of the reverse osmosis membranes. Precipitation occurs when the solubility limits of these various salts and silica is exceeded. 

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Topics: membrane treatment system, membrane treatment, water treatment, scale inhibitor