Harness the Power of THIOGUARD for OPTIMAL Treatment and Maximum Resource Recovery

By Thioguard

Resource Recovery is currently a primary focus in the water treatment industry across the U.S. – a key objective for plant operators, executives and municipalities. Mg-Water, Premier Magnesia’s Water Utility Group, is an innovator in helping the nation’s water industry evolve and adapt. As America’s largest supplier of magnesia products,
Premier is also the water industry’s most trusted knowledge resource for magnesia and its central role in the evolving Resource Recovery Revolution.

THIOGUARD OX – A Thioguard Innovation

By Thioguard

All the Benefits of THIOGUARD®, Now Available in Powdered Form

THIOGUARD OX is a proven, premium quality, technical-grade magnesium oxide, manufactured through a proprietary process for application in municipal water and wastewater treatment. THIOGUARD OX is mined and processed exclusively by Premier Magnesia, LLC in the USA.

Your existing storage and feed system can be used to deliver THIOGUARD OX without costly modifications. You can begin reaping the benefits of THIOGUARD OX without up-front costs.

THIOGUARD OX is manufactured to an exacting particle size and specific surface area to provide the highest reactivity, and superior handling. This provides consistent performance, LESS CAKING AND “CLUMPING”, and better dispersion, which is critical to treatment plant operations, while reducing sludge generation.

THIOGUARD OX has the highest available surface area and reactivity as a result of Premier’s proprietary manufacturing process. Wastewater treatment is performed in a sensitive biological environment wherein operation is performed at near-neutral or slightly alkaline conditions, requiring the highest reactive grade magnesium oxide available. Less reactive grades are incapable of sufficiently neutralizing acid generated in these environments, and will pass through the system unused or accumulate as sludge. THIOGUARD OX results in improved plant performance and reduced operating costs.

THIOGUARD OX is available at distribution terminals throughout the USA, and delivers Total System Treatment with multiple additional benefits. When compared to Quicklime, there is no “slaking” required. THIOGUARD OX is the practical choice that provides a safer, more cost-effective alternative.

Lime produces calcium carbonate in wastewater which acts as a coagulant for hardness and particulate matter. Lime may potentially increase the volume of waste sludge up to 50 percent.


THIOGUARD OX, hydrated lime, quicklime, and soda ash each have different physical and chemical properties that affect how each reacts with the systems to which they are added.

HIDDEN COSTS: Iron use Steals Alkalinity/pH and Actually Increases Hydrogen Sulfide and Corrosion

By Thioguard

The usual discussion of sulfide removal emphasizes iron chemistry and fails to mention other reaction products resulting from the chloride and sulfate being released when the iron combines with the sulfur to form iron sulfide, a black precipitate. Additionally, iron strips alkalinity when used inside the plant. If there is also a chronic phosphorus deficiency, the result is needless organism death and higher plant biosolids disposal costs. The focus in this write-up is on odor control complications with iron sulfate.


1. The first step in the reaction produces iron sulfide as a precipitate and sulfuric acid. If this were all that happens in wastewater, iron would be fed at a stoichiometric rate of 4.5 lbs. of ferrous sulfate to remove 1 pound of H2S. This turns out not be the case and 2 to 3 times that amount is necessary for sulfide reduction. Why? There are competing reactions in wastewater that will consume iron. Phosphorus, chlorides, sulfates, hydroxide, carbonate, oxygen and other common compounds compete for the available iron.

2. Now let us examine what may happen to the H2SO4 that is produced as a reaction product. First, it is corrosive and works to lower the pH in the wastewater. Second, sulfuric acid rapidly dissociates and will allow SO4-2 to be used as an oxygen source by the sulfate reducing bacteria producing more H2S.

3. Theoretically, iron sulfate could produce as much sulfide as it removes stoichiometrically, which then must be removed with additional iron. Lowered wastewater pH will also allow more H2S to be released as gas.


In contrast, Thioguard does nothing to lower the pH of the wastewater, produces no reaction products that can lead to additional sulfide production, and produces no sludge to settle out in the system or to be dewatered at the WWTP. The reaction is as follows:

The Magnesium binds the sulfide in a similar manner to iron and it will not be released unless the pH drops to 5.5 which is not normal in wastewater. More importantly, Thioguard is preventative and controls the formation of sulfide by increasing the pH and retarding the Sulfate Reducing Bacteria activity.


If you use 2,000 Gallons of Caustic Daily, Switching to Thioguard will Save You at Least $689K a Year

By Thioguard

Use our web calculator to determine YOUR savings in chemical costs.
And, this is just a FRACTION of your total savings!
Thioguard will help to:

  • reduced energy costs due to carrying excess biomass
  • reduced polymer use for biosolids processing and dewatering
  • reduced biosolids disposal and hauling cost
  • reduced insurance and liability costs, improved workplace safety

THIOGUARD Takes the Cake… and Makes it Better.

By Thioguard, Uncategorized

For a nearly one million gallon a day plant in Lambertville, NJ the good news just kept on coming. First, they started using Thioguard  to condition their primary sludge to reduce odors from the plant. This worked so well, they began to ask, “Where else can Thioguard be applied?”

As the winds whipped in early Spring, it was discovered that a significant amount of odor was coming from the nearly quarter million gallon sludge holding tank at their site. Since Thioguard worked to reduce the primary sludge odors, they wondered if it would work for stored sludge waiting to be pressed.

After establishing a stable pH range of 7.5-8.0 s.u., with just a couple of gallons a day, odors were reduced to satisfactory levels… and then something very interesting happened. Not only were odors in the press building reduced, but the press cake was drier. On average nearly 20-40% drier.

Why? Thioguard is technical grade magnesium hydroxide: a buffered source of alkalinity that is used to increase pH. Elevated pH promotes better polymer performance. Not only that, but due to divalent cation bridging, the press supernatant quality can be clearer as well. Any remaining alkalinity is then returned in the supernatant to the headworks of the plant.

The Lambertville results were recently verified on a much larger scale through bench testing at a treatment plant in Newark, Ohio. The chart below illustrates expected typical annual cost savings in hauling and tipping after the addition of Thioguard at a 100 MGD plant. The bottom line? For every 1% improvement in cake solids, the plant would save approximately $214K in hauling and tipping costs. In multiple tests, the use of Thioguard consistently resulted in 5% to 13% improvement in cake solids with greatly reduced water weight. Drier cake solids means less to haul, and fewer loads translates directly into operational savings.

Enhance Your Anaerobic Digestion Process to Save Money & Improve Performance

By Thioguard

Historically, iron compounds have been added to anaerobic digesters for odor control. However, Iron is responsible for a multitude of unintended consequences in digesters. Premier Magnesia and Thioguard have been using magnesium hydroxide to improve operation of anaerobic digesters for over 30 years. Magnesium hydroxide is an alternative to iron that will actually improve the operation of the digester. The table below clearly illustrates the benefits and COST SAVINGS when magnesium hydroxide is substituted for iron in anaerobic digesters.

If the owner or operator is concerned with struvite formation, THIOGUARD has a model to predict struvite formation potential and has a proven solution that will prevent struvite formation, if predicted by the model. THIOGUARD ΩMEGA-S actually prevents struvite formation. Do not let unwarranted concerns over possible struvite formation prevent your utility from reaping the benefits of magnesium hydroxide in your anaerobic digesters.

Enhance Phosphate Treatment with THIOGUARD

By Thioguard

In plants currently using metal salts, the addition of
THIOGUARD® technical grade magnesium hydroxide can

Increased regulation of total phosphorus limits are a fact of life, and another challenge for WWT plant operators and engineers. In most treatment plants, metal salts (ferrous/ferric or aluminum) are added for the treatment of phosphates.

Adding THIOGUARD technical grade magnesium hydroxide will:

  • Minimize or eliminate the addition of metal salts
  • Enhance biological phosphorus uptake in bioreactors
  • Reduce the amount of metal-laden sludge
  • Increase agricultural phosphate recovery
  • Reduce dewatering, handling and transportation costs
  • Eliminate the need for expensive plant upgrades

THIOGUARD is specifically formulated for maximum alkalinity and magnesium utilization in biological processes, enhancing the performance of metal salts in removing phosphates chemically – while simultaneously improving biological uptake in bioreactors.

THIOGUARD improves plant performance
Improved plant performance = Significant Savings

Thioguard is engineered to provide maximum magnesium hydroxide and sustained alkaline utilization, enhancing the formation of metal hydroxide precipitate and increasing the adsorption of soluble phosphorus.

The benefits of adding THIOGUARD to your treatment processes are not limited to enhanced phosphorus treatment and management. In addition, THIOGUARD is the ONLY commonly used product that has a direct mechanism to prevent corrosion through sustainable and balanced pH levels. You will also benefit from a reduction in the formation of metal-laden sludge – significantly reducing your handling and transportation costs. The benefits are numerous and system-wide, making THIOGUARD the practical choice for your entire system.

Don’t Be Blindsided by Lime’s Hidden Consequences

By Thioguard

It’s easy enough to do theoretical calculations and provide exact alkaline equivalents between Lime and Technical Grade Magnesium Hydroxide. However, field and trial experience tells us a more complete story. The amount of high-grade Thioguard – technical grade magnesium hydroxide required to achieve equivalent buffering / performance benefits in the biological reactors tends to be much lower than the calculations would suggest.

Often overlooked are the hidden consequences of lime use, such as softening and pH spikes, and confusion about what standard total alkalinity tests are telling us. An easy way to find out the extent of softening that is taking place in your facility is to filter your sample with a 0.45 micron filter before titration. This will remove the insoluble CaCO3 – calcium carbonate particles that are not “biologically available.” Another significant, yet overlooked impact is the EPA documented sludge production associated with Lime.

Compared to Lime, Thioguard is capable of supplying significantly more alkalinity in a bio-available form to a microbial waste-water system without adversely affecting pH.

When you add Lime to your basins, it’s likely you are creating detrimental “Hot Zones” which have the triple negative effect of:

  1. converting soluble alkalinity into an unusable form of alkalinity,
  2. creating an environment hostile to healthy bacteria, killing them off entirely or significantly reducing their ability to function efficiently
  3. converted soluble alkalinity takes up capacity in reactors and increases the inert, inorganic fraction of the operational MLSSLIME SOFTENING = ALKALINITY REMOVAL
    Lime is commonly used in potable water to “soften,”or remove hardness minerals, such as calcium and magnesium from drinking water, in an effort to minimize the effects of potential scaling in the water distribution system. However, in the softening process, calcium and magnesium are removed from water in the form of calcium carbonate (CaCO3) and magnesium carbonate (MgCO3) which are also forms of alkalinity. Removing hardness from water also removes alkalinity. In wastewater, Lime is often considered as an alkalinity supplement. However, the effects of Lime softening can have undesirable consequences to the biological system, e.g., removal of alkalinity, creation of CaCO3 – calcium carbonate sludge, and the potential for bio-upsetting pH spikes.TRANSPORT SAVINGS
    The use of Lime generates significant amounts of sludge in wastewater collections and treatment. On a chemical basis, one ton of Lime can generate as much as 11.5 to 15.5 tons of 20% sludge cake to remove or dispose. In contrast, Thioguard reactions in wastewater produce only water and water soluble products as TDS with NO added sludge. In fact, customers using Thioguard have reported reductions of 15% – 25% in total solids/sludge produced, due to a combination of improved biological performance and reduced inorganic solids loading.The use of Lime generates significant amounts of sludge in wastewater collection systems and treatment plants. On a chemical basis, one ton of Lime can generate as much as 5 tons of 20% sludge cake to remove or dispose. In contrast, Thioguard reactions in wastewater produce only water and water-soluble products as TDS with NO added sludge. In fact, customers using Thioguard have reported reductions of 15%-25% in total solids/sludge produced, due to a combination of improved biological performance, divalent cation bridging of floc matrix, and reduced inorganic solids loading.Most wastewater treatment plant operators understand that their wastewater treatment plants function best at some ideal pH and that a minimum amount of alkalinity is required to keep microorganisms happy. But too often, the values of pH and alkalinity are incorrectly used interchangeably, and a thorough understanding of each parameter’s true relationship to biological stability and optimal performance – gets lost in the translation.Most often this error in terminology stems from the use of common alkaline pH modifiers and alkalinity supplements, such as hydrated Lime. It’s use may successfully meet pH targets, but will likely fall short in supplying adequate alkalinity requirements without adversely elevating pH beyond biologically healthy limits. And often, maintaining pH stability and uniformity across entire treatment basins remains a virtual impossibility.Unfiltered testing, may cause plant operators to errantly believe there is sufficient soluble alkalinity, or true pH buffering capacity, in the aqueous system. In filtered alkalinity tests, you are removing most, if not all of the insoluble alkalinity, resulting in a much more accurate representation of pH buffering capacity. Better information leads to better decisions. Better decisions lead to improved plant performance.
    Resource Recovery is currently a primary focus in the water treatment industry across the U.S. – a key objective for plant operators, executives and municipalities. Mg-Water, Premier Magnesia’s Water Utility Group, is an innovator in helping the nation’s water industry evolve and adapt. As America’s largest supplier of magnesia products, Premier is also the water industry’s most trusted knowledge resource for magnesia and its central role in the evolving Resource Recovery Revolution.

Thioguard vs. Nitrates

By Thioguard

Thioguard vs. Nitrates Do Nitrates Do More Harm Than Good?

Calcium Nitrate products are commonly used in many of the nation’s wastewater collection systems, and they supposedly do one thing – prevent H2S odors. Unfortunately, there are multiple costly and problematic unintended consequences of the use of nitrate products. In addition, while nitrate use may temporarily address H2S odor problems, nitrate products are of little or no use in combating corrosion, which is a tremendous problem both in-plant and throughout every segment of wastewater treatment infrastructure.

where you don’t want them to occur.
Think denitrification…which consumes organics, and produces nitrogen gas N2 and carbon dioxide CO2, all seemingly innocuous by-products of Calcium Nitrate’s intended use as an odor control technology…but let’s take a closer look…

1. Nitrates contribute to the formation of F.O.G.
The addition of nitrates contributes to the accumulation of an odorous film, often referred to as a F.O.G. (Fats, Oils and Grease) mat in pumping stations and at your plant. Blockages associated with F.O.G. have been shown to be the greatest contributors to O&M costs including energy consumption, maintenance costs, and Sanitary Sewer Overflows (SSOs).

2. Nitrates contribute to Gas Binding in the Collection System
The transfer of wastewater can result in the release of gases such as O2 – Oxygen, CO2 – Carbon Dioxide, N2 – Nitrogen Gas, H2S – Hydrogen Sulfide, CH4 – Methane, VOCs – Volatile Organic Compounds, and VOSCs – Volatile Organic Sulfur Compounds, among others. Some of these gases are drawn into the system through pumping and ventilation, while others are generated within the system either chemically or biologically. These gases can result in the development of gas binding in the system, and are dramatically exacerbated with the utilization of calcium nitrate.

3. Nitrates upset the Bio-P process at your plant
The use of nitrates in the collection system alter the chemical and biological conditions of the collection system, which would otherwise facilitate the formation and transport of VFAs to the treatment plant, where they can be used by PAOs in Bio-P processes.

As VFAs (Volatile Fatty Acids) are eliminated with calcium nitrate addition, VFAs are therefore not available for PAOs (phosphorus accumulating organisms) for phosphate removal at the wastewater treatment plant.

4. Nitrates negatively impact Primary and Secondary Clarification
The addition of nitrates is not an exact science, and unfortunately, every step along the way there are costly unintended consequences. Add too little, and you’re facing odor problems. Add too much, and you’re faced with the formation of unwanted bubble-forming gases (N2 and CO2 from denitrification) in your settling tank, exactly where you DON’T WANT IT, continuing the formation of F.O.G. mat, (as well as creating an environment unfavorable to your biological processes). This often results in increased metal salts usage or increased polymer usage and associated increases in costs.

Calcium Nitrate has a short half-life in sewers, and therefore many addition locations are required to achieve adequate system-wide control. This requires several addition locations, and corresponding higher costs and operational oversight. In contrast, a single THIOGUARD Feed Unit can often replace several nitrate feed stations, and maintain a relatively constant pH level throughout.

Maintaining a constant surface pH of 6-8 can reduce the rate of corrosion by as much as 100X. The cost of simply ignoring this problem is monumental and THIOGUARD is the only commonly used product that has a direct mechanism to increase surface pH and prevent corrosion.


  • Decrease maintenance costs
  • Decrease operating power costs
  • Decrease F.O.G. related SSOs and ARV malfunction
  • Improve efficiency due to reduced discharge pressure in manifolded force mains
  • Improve Biosolids
  • Save money and improve plant performance ACROSS THE BOARD!