Truth & Myth About Chlorine

There are a number of misunderstandings with regards to chlorine and sanitation. The most common ones are:

Myth Chlorine is Harmful to plants, chickens and drinking water.

Truth Chlorine without proper control mechanisms and understanding can be harmful to plants, poultry and drinking water. Hanna’s technology allows the customer to safely and effectively use chlorine.

Myth You can volumetrically inject the same amounts of chlorine and it will address by sanitation needs

Truth This is not true. You must have a solution that adjusts for changes in biological loads. Ecoli, Bacteria and Algae activity is not constant, which is why you should have a system that adjusts to account for increases or decreases in pathogen activity.

Myth By monitoring only my chlorine will provide enough assurance that adequate sanitation is occurring.

Truth This is not true. The Hanna system allows for Chlorine control and incorporates an additional validation of sanitation effectiveness via ORP. ORP stands for Oxidation Reduction Potential. ORP is a measurement of the effectiveness of the sanitation by reading the very tiny voltage generated when an ORP Electrode is placed in water in the presence of oxidizing and reducing agents

Eliminating Bacteria

The following chart illustrates the increased effectiveness of eliminating unwanted bacteria at different ORP Values.

Summary of results from various lab simulation and commercial hydrocooler survey studies
Survival at ORP (mV)
Prepared by Trevor V. Suslow, Ph.D., Postharvest Quality and Safety from Seed to Shelf, University of California
Pathogen/Indicator E.coli 0157:H7 < 485
> 300 s
<550 x < 620
< 60 s
> 665
< 10 s
Salmonella spp. > 300 s > 300 s < 20 s
L.monocytogenes > 300 s > 300 s < 20 s
Thermotolerant coliform >48 h >48 h < 30 s