Nitrate Treatment

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Nitrate Treatment
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Nitrates can be present in groundwater and surface water for many reasons. The most common sources of nitrate contamination in surface and groundwater can be as a result of blasting operations at mines, from storage of flue gas waste water, spills and accidental releases on industrial sites as well as from the biological degradation of nitrogen based organic compounds.

Membrane Bioreactor

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Nitrates can be broken down in to nitrogen gas with denitrifying bacteria in an anoxic environment. newterra’s MBR process is ideal for biological breakdown of nitrates while our ultrafiltration membrane ensures pristine effluent quality when discharging to sensitive water bodies. Our MBR process, when applied to nitrates includes a combination of anoxic and aerobic reaction tanks followed by our ultrafiltration membrane.

SBRegen Treatment System

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newterra SBRegen™ Treatment System is specifically developed as a cost effective method of nitrate treatment for low concentration, high flow, cold water applications. This technology utilizes a proprietary nitrate removal media housed in a set of parallel vessels to process the main wastewater stream. Vessels are cycled off line, conditioned, regenerated, backwashed and brought back on line. The regeneration is completed with our biological regeneration recycle process where denitrifying bacteria converts nitrates released from the media into nitrogen gas.

BRAT Treatment System

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newterra’s BRAT™ Treatment System utilizes a proprietary nitrate selective media in a constantly regenerating moving bed bio-filter. This technology has been developed to achieve biological treatment of high concentration nitrates between 100 mg/L to 3000 mg/L. Solids are constantly drawn off the filter that can be sent to a sludge dewatering process as required.

Reverse Osmosis (RO)

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RO membranes can be applied for nitrate rejection in selected applications where there are efficient solutions for disposal of the concentrate wastewater. Special membranes are often required to reduce ion leakage through the membrane and multiple passes may be implemented to achieve designed effluent conditions. RO technology can also be applied as the first stage in concentrating nitrates upstream of other technologies such as evaporators.

Ion Exchange

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Ion exchange is also an effective method of removing nitrates in the water. Nitrate anions are typically exchanged on the resin with chloride anions. Strong base anion resins work to remove nitrates but will prefer sulfates making them less effective in water bearing high sulfates. newterra also offers a nitrate specific resin in the chloride form with a preference for nitrates over sulfates. This product will often be a better choice for treatment of nitrates in ground streams as nitrates are not prone to dumping off the resin as higher sulfate concentrations take preferential places on the resin.