The De Nora blog: Water Made Easy

ClorTec® for Municipal Water and Wastewater Facilities

Aug 10, 2021 4:15:33 PM / by Dave McWalters posted in water treatment, CloreTec, oil and gas, produced water treatment


Concerned About Future Bromate, Chlorate, and Perchlorate EPA Regulations? Feeling the Pressure to Reduce Operating Expenses? Take A Look at a New ClorTec Retrofit Program from De Nora. by Dave McWalters
It’s clear that water and wastewater companies want disinfection and oxidation equipment that’s robust, serviceable, able to get up and running quickly, and provides access to knowledgeable technicians in a timely manner. Over the years, De Nora has provided all of that—and the peace of mind that comes from a track record of product reliability and excellent service. We continue to provide a variety of services to our hypochlorite generators with quality, capable technicians. What we didn’t have until recently; however, was an upgrade program to retrofit our older equipment with newer technology. The EPA’s recommended bromate, chlorate, and perchlorate limits, while not a regulation currently, coupled with increasing operating expenses driven by the high cost of salt, have caused many of us in the industry to wake up and take a programmatic look at addressing this burgeoning need. That’s why we created a new retrofit program to upgrade De Nora systems. This program called ClorTec Gen III is specifically designed for those systems that handle volumes of 450lbs/day or more and are over five years old, basically a generation prior to the most current technology.

Consider our ClorTec Gen III program to see how it may apply to your facility. As with any service program, our technicians will first conduct an on-site survey to understand the condition, age, capacity, and any issues with your current equipment. Then we’ll recommend one of several upgrade kits to make your system compliant with the current Gen III technology. Our scope of work may include some combination of the following equipment: Gen III Hypo Generator Rack (with or without cells), replacement of acrylic cells with PVC/FRP cells, upgrading or replacing your control panel, replacing the rectifier (whether air or oil coiled), and/or adding a water chiller. In addition to a complete 20-point system service check, we will include a warranty (standard or extended) and a maintenance agreement to keep your new system up and running reliably.

Your ‘new’ ClorTec Sodium Hypochlorite Generator will provide a number of important benefits. Safety: with less than 1% chlorine concentration and the lowest disinfection by-product impact available today. Lower Operating Costs: with the most efficient OSHG available requiring the lowest amount of salt, as well as low maintenance and service costs. Reliability: with a simple system design, quality parts, and long electrolyzer life. Green Footprint: with the lowest carbon footprint impact and no plastic packaging of chemicals. All of this is backed by De Nora, a leader in OSHG with over 6000 installations, cutting-edge innovation and research, and worldwide R&D and support.

As an example, one of our customers, the second largest provider of potable water in Cobb County Georgia, relies on two water treatment facilities to prepare water for wholesale distribution to 11 retail water suppliers, as well as industry and institutional customers. The historic use of chlorine gas became a potential concern not only in Georgia, but across the entire county. Their first installation of a ClorTec system, supplying 1500lbs/day of sodium hypochlorite, eliminated the need for bulk chemical storage and lowered its disinfection byproducts. Today, with three generators, two operating at a time, the latest high-efficiency Gen III upgrades are well received, providing 7-9 hour run times and excellent production of potable water for its satisfied customers. In addition, the new instrumentation panel with analog signals enables them to have greater flow control, better diagnostics, and peace of mind.

Get ahead of upcoming EPA regulations, lower your operating expenses, and benefit from the safety features available through De Nora. Contact xxx to get more information about the new Gen III retrofit/upgrade program or any of our service and support options for ClorTec customers.

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ClorTec® Electrochlorination: The Water Treatment of Choice for Upstream and Midstream Applications - Interview with Andrew Boal, PhD

Jul 20, 2021 2:57:41 PM / by Andrew Boal, PhD posted in water treatment, CloreTec, oil and gas, produced water treatment


De Nora’s product and industry expert, Andrew Boal, has a PhD in organic chemistry, having spent the earlier part of his career at Sandia National Labs and NASA doing research in nanotechnology and looking for life on other planets before joining the water industry. So, you may be wondering why he’s uniquely qualified to advise our Oil & Gas customers on how to best treat oilfield water at various stages of the production process. Today, his scientific mind is being applied to developing novel approaches to Oil & Gas water treatment, particularly for midstream companies and produced water recycling opportunities. As Andrew would say, “Think of produced water as a valuable resource, not an operational waste product.”

De Nora’s focus for the Oil & Gas industry has always been on disinfecting freshwater used in hydraulic fracturing; however, there has recently been increasing demand for midstream water management, because of the scarcity—and value—of fresh water. Since this is one of the more complex areas of water treatment, De Nora relies on experts like Andrew to address these challenges. “The makeup of this water is very complicated—much more so than at a municipal water treatment plant or cooling tower.” He further explains, “With hydraulic fracturing, you get 9-10 barrels of produced water for every barrel of oil, and that produced water needs to be disposed of elsewhere.” It is estimated that in the U.S. onshore environment, up to 20 billion barrels of water are produced every year, along with hydrocarbons. This water is injected into either producing wells for enhanced oil recovery or into saltwater disposal wells. Pure volume is just one of the reasons that the demand for recycling has increased exponentially.

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SANILEC® and SEACLOR® Upgrade and Retrofit Programs for Offshore O&G Operators

Mar 29, 2021 3:25:01 PM / by Jose Lopez posted in oil and gas, Sanilec, SEACLOR, Retrofit Programs, Water Parts and Service


As a mechanical engineer and technology professional, who was also one of the original designers of SANILEC equipment in the early 2000s, Jose Lopez understands the piping and structural layouts of seawater electro-chlorination systems inside and out. Today, as the technology manager for both SANILEC and SEACLOR product lines, he is on a mission to make the maintenance and care of these critical systems readily accessible to offshore equipment owners everywhere.

For any near shore or offshore application—from power plant cooling to firewater circuits or any underwater equipment that has access to saltwater, De Nora is the electro-chlorination market leader. De Nora has been instrumental in making sure that essential Oil & Gas equipment stays clean and in optimum condition for almost 100 years—with performance, safety, and environmental concerns as top priorities.

De Nora Retrofit Programs
Extending the life of older equipment can help lower costs, and in many instances, keep your electro-chlorination system working as good as new. Many systems in the field, even those 20-25 years or older, have an excellent maintenance record. Form the retrofit perspective, for them maintenance is more about cell replacement every five to seven years. Other customers may be experiencing downsizing of their staff and need a remote monitoring capability—with the addition of automation, transmitters, and controls so the operator can monitor the health of a system from a single master control center. While remote monitoring has been in practice a very long time—primarily for status and alarms —De Nora can improve that automation by designing a box (seawater in/hypochlorite out), then sending the hypochlorite to ten or more different locations. Automating the process allows the operators to avoid isolating those valves—saving time, money, and unplanned outages.

Other older systems may be ready to change out their technology—either because they have outgrown their capacity and need more chlorination. These SANILEC customers may want to add an additional electrolyzer, or alternatively upgrade to the SEACLOR product line, which features a more compact design and the ability to produce higher capacities. Regardless, these are major decisions that take advanced planning and our field technicians are at the ready to review your specific requirements and make a recommendation.

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Marine Sewage Treatment for Offshore Oil & Gas: Risks of Counterfeit Components on Regulatory Compliant Equipment

Sep 8, 2020 3:50:00 PM / by Dana Casbeer posted in marine, Sewage treatment, oil and gas



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What are Mobile Treatment Units (MTU's) and how do they work?

Sep 1, 2020 9:30:00 AM / by De Nora posted in onshore, oil and gas


Mobile Treatment Units for disinfection of produced water in the Oil & Gas industry

Mobile Treatment Units (MTU's) are the safest and most effective oil field water treatment solution on the market today. A MTU is a self-contained system for the on-site generation of sodiium hypochlorite, an effective oxidizer that can be used to disinfect water used in hydraulic fracturing operations and do the heavy lifting in recycling produced water. MTU's are build in  standard C-containers, which are air-conditioned for a safer and more comfortable working environment, and the system comes with all of the equipment needed to generate and inject sodium hypochlorite as well as the testing equipment needed to monitor water treatment operations.

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5 Things You Need to Know About Solids in Marine Sewage Treatment

Aug 26, 2020 8:30:00 AM / by De Nora posted in De Nora, Sewage treatment, oil and gas


On offshore Oil & Gas production and extraction facilities, the sewage treatment system often manages an enormous amount of raw wastewater, i.e., …human sewage. The untreatable or separated wastes from these systems are commonly referred to as “screened or filtered raw biomass”, or, “wet waste sludge.”

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Bacteria in Oilfield Waters and Why They Should Be Controlled

Aug 11, 2020 10:15:00 AM / by De Nora posted in oil and gas, oilfield, disinfection, produced water treatment, produced water recycling


Oilfield bacteria are present everywhere water can be found in the hydrocarbon production process. Unchecked bacteria populations can result in operational issues through the upstream and midstream production environment. Starting at the producing formation itself, bacteria introduced into the formation during drilling, completion, or flooding can result in the plugging of the formation as well as the wellbore. 

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Application Spotlight: Injection Wells

Jul 15, 2020 6:17:42 PM / by De Nora posted in water treatment, oil and gas, oilfield, produced water


Injection wells and drilling can be a quite confusing subject for those who are unfamiliar with oilfield operations. This short application spotlight is intended to provide readers with a brief overview of the terminology and processes associated with this subject.

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