The De Nora blog: Water Made Easy

Operation and Maintenance Costs for Chlorination

Aug 6, 2020 5:15:00 PM / by De Nora posted in water treatment, drinking water, chlorination, gas feed

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Chlorine is commonly available in three different forms: gaseous chlorine, calcium hypochlorite, and sodium hypochlorite, which are all used in chlorination.

Gas chlorine is typically packaged in 150 lb cylinders and 1-ton containers. This is 100% elemental chlorine stored as a liquified gas under pressure. The chlorine is fed to the process using a pressure feed system which applies the chlorine gas directly to the process or a vacuum operated - solution feed system which uses a water operated ejector to create a chlorine solution which is applied to the process.

Calcium hypochlorite is typically packaged as a solid tablet containing 60% active chlorine. The chlorine is fed to the process using a simple tablet feeder that passes the process water through a tube of tablets, causing the tablets to dissolve into the water. More sophisticated tablet systems dissolve the tablets in water making a solution of controlled chlorine concentration, which is then fed to the process using a chemical dosing pump.

Sodium hypochlorite is a liquid containing 12-15% active chlorine when fresh. Sodium hypochlorite is typically delivered to plant storage tanks by truck and applied to the process using chemical dosing pumps. With this form of chlorine, the concentration decays over time.

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Chloramination Control in Drinking Water

Jul 16, 2020 12:45:00 PM / by De Nora posted in drinking water, CAPTROL Controller, gas feed

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What is chloramination?

Chloramination is a secondary disinfection process by which chlorine (Cl2) and ammonia (NH3) are combined to produce chloramines, a persistent disinfectant used to maintain a residual in a long distribution system . The residual chloramine aids in preventing post microbial growth in the distribution system.

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Choosing the Right Water Disinfection

Jun 11, 2020 4:30:00 PM / by De Nora posted in ozone, drinking water, sodium hypochlorite, on-site sodium hypochlorite generation, MIOX, clorate, chlorine dioxide, ultraviolet light, on-site chlorine generation, calcium hypochlorite, chloramines

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The Status of Chlorate Regulations & Impact on Water Treatment - MIOX

Jun 2, 2020 11:00:00 AM / by De Nora posted in drinking water, sodium hypochlorite, on-site sodium hypochlorite generation, MIOX, clorate

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Maintaining Your Capital Equipment

May 26, 2020 9:45:00 AM / by De Nora posted in wastewater treatment, drinking water, MIOX

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Investing in drinking water and wastewater systems is an essential step in protecting both public health and the environment. Yet, given the recent economic climate, making the decision to move forward on any capital project is one that involves a great deal of planning and consideration. Two key factors that should always be considered are cost and reliability.  

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Status of Chlorate Regulations & Impact on Water Treatment - ClorTec

May 14, 2020 3:00:00 PM / by De Nora posted in drinking water, Clortec, sodium hypochlorite, on-site sodium hypochlorite generation, clorate

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Maintaining Your Capital Equipment

Apr 28, 2020 7:15:00 AM / by De Nora posted in wastewater treatment, drinking water, Clortec, sodium hypochlorite

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Investing in drinking water and wastewater systems is an essential step in protecting both public health and the environment. Yet, given the recent economic climate, making the decision to move forward on any capital project is one that involves a great deal of planning and consideration. Two key factors that should always be considered are cost and reliability.  

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