Monthly Archives

September 2020

Enhance Phosphate Treatment with THIOGUARD

By Thioguard

In plants currently using metal salts, the addition of
THIOGUARD® technical grade magnesium hydroxide can
REDUCE METAL SALT USAGE BY UP TO 50%

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

DON’T GET YOURSELF IN DEEP SLUDGE
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.

POUND FOR POUND, AND IN EVERY STEP OF YOUR PROCESS, THIOGUARD IS SUPERIOR
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.

AVOID A “TRIPLE” NEGATIVE CONSEQUENCE
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.
  4. HARNESS THE POWER OF THIOGUARD FOR OPTIMAL TREATMENT AND MAXIMUM RESOURCE RECOVERY
    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.

NITRATE USE ENCOURAGES UNWANTED BIOCHEMICAL REACTIONS…
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.

NITRATE ADDITION REQUIRES MULTIPLE FEED LOCATIONS,
THIOGUARD ONLY REQUIRES ONE
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.

THIOGUARD HELPS PREVENT CORROSION
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.

CHOOSING THIOGUARD OVER CALCIUM NITRATE WILL: 

  • 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!