Remotely Measure Levels of Total Ammonia Nitrogen in Water
Monitoring Water for Total Ammonia Nitrogen With KETOS SHIELD
If you’re a water operator, you need an intelligent solution that can offer lab-accurate automated monitoring across a wide variety of water testing parameters – including total ammonia nitrogen.
Why is wastewater effluent ammonia rising?
Effluent ammonia usually rises because nitrification has slowed, or because the ammonia load has grown faster than the plant can convert it. Nitrifying bacteria grow slowly and are sensitive, so the common causes are:
- Low dissolved oxygen in aeration. Nitrifiers need more oxygen than the bacteria that remove BOD, so a blower problem or a load spike starves them first.
- Cold water. Nitrification slows sharply as temperature drops, which is why many plants see effluent ammonia climb in winter.
- Low alkalinity or pH. Nitrification uses about 7.1 mg/L of alkalinity (as CaCO3) for each mg/L of ammonia-nitrogen converted. When alkalinity runs short, pH falls and nitrification stalls.
- Sludge age too short. Wasting too much sludge, or losing solids in a high flow, removes nitrifiers faster than they regrow.
- A higher ammonia load. Septage, landfill leachate, industrial discharges and return streams from sludge dewatering can add ammonia faster than the plant converts it.
- Inhibitory discharges. Some metals, solvents and other industrial chemicals slow nitrifiers even at low concentrations.
What to check first: trend dissolved oxygen, temperature, alkalinity and pH in the aeration basin against effluent ammonia; compare influent ammonia with the load the plant normally handles; then review recent sludge wasting and any new industrial or hauled waste.
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Order a Water Test →Online ammonia analyzer, ISE probe or grab samples: which should a wastewater plant use?
Most plants use more than one. Ion-selective (ISE) probes sit in the basin and read continuously, which suits aeration control, but they drift and need frequent checks. Online analyzers measure a filtered sample and are more stable, with reagents and upkeep. Grab samples analyzed by a certified lab are the reference for permit reporting.
| Option | Where it measures | How often | Accuracy and upkeep | Best use |
|---|---|---|---|---|
| ISE probe | In the basin | Continuous | Drifts; potassium can interfere; regular cleaning, calibration and checks against lab results | Ammonia-based aeration control |
| Online wet-chemistry analyzer | A filtered sample stream | Every few minutes, by measurement cycle | More stable than ISE; reagents, sample filtration and calibration | Trending ammonia at one key point |
| KETOS SHIELD | Samples drawn on site; ammonia measured alongside nitrate, nitrite, orthophosphate and metals | About hourly for ammonia; pH and conductivity about every minute | Within ±10% of certified lab results; self-calibrating, consumables included | Influent, effluent and reuse points that need several parameters with little operator time |
| Grab samples + certified lab | Wherever sampled | Per permit schedule | Reference method; staff time and lab fees | Permit reporting |
KETOS SHIELD measures total ammonia nitrogen on site together with nitrate, nitrite, orthophosphate and metals, within ±10% of certified lab results, without adding sampling time. Operators get the data and alerts and decide what to adjust. The Metropolitan Sewer District of Greater Cincinnati runs SHIELD on the raw influent and treated effluent at its Little Miami facility to track chlorine, pH, orthophosphate and nitrogen species on both sides of treatment.
Accurately Measure Levels of Ammonia Nitrogen in Water
Download our KETOS SHIELD overview to reveal how:
- We deliver lab-precision accuracy (ppb) with an extensive operating range
- KETOS plugs into existing infrastructure and interoperates with existing systems (including SCADA) to improve water quality visibility without disrupting operations
- Users eliminate static water testing, constant cleaning, or manual calibration to save time and money
- Real-time monitoring allows for real-time decision-making, protecting equipment, and preventing downtime
Learn To Automate Total Ammonia Nitrogen Testing In Water With Lab-Accurate Results in Real-Time
Testing for Total Ammonia Nitrogen in Water
KETOS SHIELD marries self-calibrating hardware with cloud-enabled software to deliver a solution that allows water operators to monitor for total ammonia nitrogen (and other variables) in real-time, all while lowering the traditional up-front costs associated with testing water parameters.
Introducing KETOS SHIELD, a multi-award-winning intelligent water management solution. Organizations can leverage real-time automated monitoring for total ammonia nitrogen and 30+ other water testing parameters (such as inorganic materials, heavy metals, and other environmental factors). Water operators can connect to their data via an internet-aware modular system that makes decision-making more accessible than ever – on-site, in the office, or on the move.
Why Monitor Water for Total Ammonia Nitrogen with KETOS
Ammonia is naturally occurring in water. It’s produced by organic matter decay and can enter water supplies via human activity, including petrochemical, plastic, and pharmaceutical production, as well as via fertilizers. When present in water at relatively low concentrations, ammonia poses no threat to humans, however, it can be an irritant to eyes/nose and can affect the taste and odor of water. In drinking water, monitoring for ammonia is essential as it can react with chlorine and decrease disinfection efficiency. For this reason, drinking water should not contain more than 0.2 mg/L. In wastewater, ammonia needs constant monitoring to prevent effluent from damaging local aquatic ecosystems. It can become toxic to marine life when present in larger quantities (0.5 mg/L and above).What are the Issues with Total Ammonia Nitrogen in Water?
KETOS offers advanced solutions to monitor total nitrogen in wastewater, ensuring compliance with environmental regulations and promoting sustainable water management practices.- Toxicity to Aquatic Life: High concentrations of TAN can be toxic to aquatic organisms, particularly fish and invertebrates. Ammonia is highly toxic to fish, causing gill damage, respiratory distress, and impaired osmoregulation. Ammonium ions can also interfere with physiological processes in aquatic organisms, leading to reduced growth, reproductive impairment, and increased susceptibility to diseases.
- Eutrophication: TAN serves as a nutrient for algae and aquatic plants, contributing to eutrophication when present in excess. Elevated TAN levels can stimulate algal growth and bloom formation in water bodies, leading to oxygen depletion, fish kills, and habitat degradation. Eutrophication can disrupt aquatic ecosystems, reduce water quality, and impair recreational activities and ecosystem services.
- Sources of Contamination: TAN pollution in water can stem from various sources, including agricultural runoff, wastewater discharges, aquaculture operations, and industrial activities. Runoff from agricultural lands treated with nitrogen-based fertilizers can carry excess TAN into surface water bodies, while wastewater effluents containing organic matter can release ammonia during decomposition. Aquaculture facilities may also contribute to TAN pollution through feed inputs and waste discharge.
- Regulatory Compliance: Governments and regulatory agencies establish guidelines and standards for TAN levels in water to protect aquatic ecosystems and designated uses of water bodies. Compliance with these regulations requires industries, municipalities, and other stakeholders to monitor TAN concentrations regularly, implement mitigation measures to minimize TAN inputs, and adhere to TAN-related restrictions and guidelines.
- Treatment Challenges: Removing TAN from water sources can be challenging due to its chemical properties and solubility. Conventional water treatment methods such as coagulation, sedimentation, and filtration may be ineffective for TAN removal. Advanced treatment technologies such as biological denitrification, ion exchange, and membrane filtration may be required to reduce TAN concentrations to acceptable levels.
- Environmental Impact: TAN pollution can have adverse effects on freshwater and marine ecosystems, including altered species composition, reduced biodiversity, and ecosystem imbalances. High TAN levels can lead to shifts in community structure, favoring ammonia-tolerant species over sensitive ones. Managing TAN inputs and controlling nutrient pollution are essential strategies for preventing eutrophication and preserving water quality and ecosystem health.
Causes of Total Ammonia Nitrogen in Water
Total Ammonia Nitrogen (TAN) in water originates from a combination of natural processes and human activities. Natural sources include the decomposition of organic matter such as plants, animal waste, and aquatic organisms, which release ammonia into water as a byproduct. Additionally, atmospheric deposition and runoff from agricultural lands contribute ammonia to water bodies. Human activities like wastewater discharge from sewage treatment plants, industrial effluents, and agricultural runoff containing fertilizers also introduce significant amounts of ammonia into water systems. Excessive levels of TAN can lead to eutrophication, harmful algal blooms, and degraded water quality, posing risks to aquatic life and human health. Therefore, managing sources of TAN through proper wastewater treatment, agricultural practices, and pollution control measures is essential for preserving water quality and ecosystem health.Acceptable Levels of Total Ammonia Nitrogen in Water by Industry
Total Ammonia Nitrogen (TAN) levels in water are regulated by various industries to mitigate environmental pollution and ensure water quality. Acceptable levels vary depending on the specific industry and the purpose of water use. In aquaculture, for instance, TAN levels typically range from 0.5 to 2.0 mg/L to maintain optimal conditions for aquatic organisms. Similarly, in wastewater treatment plants, permissible TAN concentrations may be higher, ranging from 5 to 20 mg/L, to facilitate effective treatment processes. Conversely, in drinking water treatment, strict standards are enforced, with TAN levels usually kept below 0.02 mg/L to ensure safe consumption. The table below outlines acceptable TAN levels in water by industry, providing a comprehensive reference for regulatory compliance and environmental stewardship.| Industry | Acceptable TAN Levels (mg/L) |
|---|---|
| Aquaculture | 0.5 – 2.0 |
| Wastewater Treatment | 5 – 20 |
| Drinking Water Treatment | Below 0.02 |
How to Easily Monitor Water for Total Ammonia Nitrogen
Monitor for total ammonia nitrogen and 30+ other water testing parameters with KETOS. Instead of measuring total ammonia nitrogen with a meter that only measures a handful of conditions; the KETOS SHIELD is capable of mentoring dozens of water related issues — in real-time. Monitor total ammonia nitrogen and over 30 other crucial water testing parameters with KETOS. From pH levels to dissolved solids, our platform provides comprehensive insights for effective water quality management. Empower your organization with thorough analysis and proactive measures to safeguard water resources efficiently. If you need to detect Total Hardness in drinking water, sulfates in river water, or Total Dissolved Solids in the mining industry, KETOS’ automated water monitoring will save time and reduce regulatory issues.What Water Quality Parameter Do You Test Most Often?
The KETOS SHIELD remotely monitors dozens of water quality parameters. Which one do your water operators test most often?
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About KETOS
KETOS is a fully integrated platform that combines hardware, software, connectivity, automated reporting, predictive analytics, and maintenance to automate water monitoring and testing. KETOS enables water operators to identify and solve mission-critical water efficiency and quality challenges in real-time, or before they happen through predictive algorithms, to ensure that water meets specific quality and safety standards.
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