Harn R/O Systems Blog

Pretreatment: The Last Line of Defense for Your R/O Membranes

Posted by Julie Nemeth-Harn on Apr 10, 2018 11:53:00 AM

Pretreatment Equipment - Theory of Operation

Some raw feed waters contain suspended particulate material. This material is commonly sand, iron oxides, clay or elemental sulfur.

Introduction of such materials into the membrane system can cause the development of excessive system differential pressure (dP), or even complete blockage of the brine channels with the resultant reduction of permeate flow. It can also cause physical damage to the membranes themselves. This usually results in a decrease of permeate quality and reduction of membrane life. Cartridge filtration is normally a simple and cost-effective way to reduce the amount of particulate matter reaching the membrane surface.

Interested in a Membrane Filtration Pilot Package?

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

Membrane Water Treatment: A Simpler and More Cost- Effective Process Than You May Think

Posted by Julie Nemeth-Harn on Mar 27, 2018 11:44:00 AM


Membrane filtration can be explained as a method of allowing certain materials to permeate a surface while blocking others. For water, this means allowing clean water to flow through the membrane while eliminating sediments and other materials or pathogens. Membrane filtration is a multiple-step process which is considered to be one of the most cost-effective water treatments available.

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Topics: membrane filtration, membrane treatment system, reverse osmosis, membrane treatment, water treatment, membrane plants, save money, water treatment plant

Improve Your Existing Water Treatment Process with a Membrane System

Posted by Julie Nemeth-Harn on Mar 6, 2018 10:02:00 AM

Membrane filtration systems are helping water treatment providers simplify and automate their processes while significantly improving water quality. Replacing or augmenting conventional treatment with membrane processes helps avoid heavy use of chemical processes and methods and can provide a superior finished water quality.

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Topics: membrane filtration, membrane treatment system, membrane treatment, water treatment, membrane plants, water quality, water purification process, water treatment plant

Introduction to a Harn R/O Systems Membrane Filtration Pilot Unit

Posted by Julie Nemeth-Harn on Nov 17, 2017 2:15:07 PM
In this RO pilot video, Jonathan Harn, project engineer with Harn R/O Systems, introduces one of our membrane filtration (MF) pilot units designed to operate standalone or as pre-treatment to our reverse osmosis (RO) pilot units. Membrane filtration is designed to remove suspended particles from water whereas reverse osmosis (RO) is designed to remove dissolved particles from water.
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Topics: membrane filtration, membrane treatment system, reverse osmosis, membrane treatment, reverse osmosis pilot

Control Narrative: How Do Water Treatment Plant SCADA & RO Membrane Treatment Systems Communicate?

Posted by Julie Nemeth-Harn on Aug 18, 2017 1:42:49 PM

The following is a brief narrative describing the intended control strategy between each a Reverse Osmosis (RO) train and the water treatment plant SCADA system. 

It describes the control system we will supply and outlines the basic operation of a Reverse Osmosis skid and the required handshaking with the water treatment plant SCADA system.  This narrative in no way encompasses all of the responsibilities of the water plant SCADA as we are not familiar with all of the requirements of the end user.

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Topics: membrane filtration, save water, save money