Friday, November 21, 2025

No human was involved in producing this blog...

 

It has been a long time since I blogged and the current "hot topic" that fascinates me is the potential for AI to be applied to wastewater treatment. So, I gave Copilot this simple prompt and let it rip. What do you think of the output? The graphic is special, for sure, and there are certainly plenty of buzzwords!

The Prompt:
Write me a blog post discussing the impact that AI and ML might have on wastewater treatment facilities. Include positives and negatives. Include opportunities and hurdles. Add in a few case studies too.

The Output: 

How AI and Machine Learning Are Transforming Wastewater Treatment Facilities


Wastewater treatment is one of the unsung heroes of modern civilization. It protects public health, safeguards ecosystems, and ensures clean water for communities. Yet, as urbanization accelerates and environmental regulations tighten, treatment plants face mounting challenges: rising operational costs, aging infrastructure, and the need for sustainability. Enter Artificial Intelligence (AI) and Machine Learning (ML)—technologies that promise to reshape the way we manage wastewater.

In this post, we’ll explore the positives and negatives, opportunities and hurdles, and highlight real-world case studies that show how AI and ML are already making an impact.


Why AI and ML Matter in Wastewater Treatment

Traditional wastewater treatment relies heavily on manual monitoring and operator experience. While effective, this approach can be reactive rather than proactive. AI and ML introduce a paradigm shift by enabling data-driven decision-making, predictive insights, and real-time optimization.

These technologies can process vast amounts of operational data—from flow rates and chemical dosing to energy consumption and effluent quality—far beyond what human operators can handle. The result? Smarter, faster, and more efficient treatment processes.


The Positives: Opportunities for Transformation

1. Predictive Maintenance

Equipment failures—such as pump breakdowns or aerator malfunctions—can disrupt operations and lead to costly emergency repairs. AI-powered predictive maintenance uses historical and real-time data to forecast failures before they occur. This allows facilities to schedule repairs proactively, reducing downtime and extending equipment lifespan.

Impact: Lower maintenance costs, fewer unplanned outages, and improved reliability.


2. Process Optimization

Wastewater treatment involves complex biological and chemical processes. ML algorithms can analyze thousands of variables to optimize aeration rates, chemical dosing, and sludge handling. This leads to:

  • Energy savings (aeration is the most energy-intensive process)
  • Reduced chemical usage
  • Consistent compliance with discharge standards

3. Enhanced Monitoring and Anomaly Detection

AI can integrate data from sensors, SCADA systems, and IoT devices to detect anomalies in water quality or flow patterns. Real-time alerts enable operators to respond quickly to potential compliance issues, preventing environmental harm and regulatory penalties.


4. Resource Recovery

Advanced analytics can identify opportunities to recover valuable resources—such as nutrients, biogas, and reclaimed water—supporting circular economy goals and reducing waste.


The Negatives: Challenges and Risks

1. High Initial Costs

Implementing AI systems requires investment in sensors, data infrastructure, and skilled personnel. Smaller municipalities may struggle to justify these costs without clear ROI.


2. Data Quality Issues

AI models are only as good as the data they receive. Poor sensor calibration, missing data, or inconsistent reporting can lead to flawed predictions and unreliable recommendations.


3. Cybersecurity Concerns

Increased connectivity introduces vulnerabilities. A cyberattack could disrupt operations or compromise public safety, making robust cybersecurity measures essential.


4. Workforce Skill Gaps

Operators need training to interpret AI outputs and integrate them into decision-making. Resistance to change and lack of technical expertise can slow adoption.


Key Opportunities Ahead

  • Regulatory Compliance Automation: AI can continuously adjust processes to meet stringent discharge standards.
  • Energy Efficiency: ML can optimize aeration and pumping schedules, cutting costs and carbon footprints.
  • Digital Twins: Virtual models of treatment plants allow scenario testing without risking real-world operations.

Hurdles to Overcome

  • Integration with Legacy Systems: Many plants run on decades-old infrastructure, making integration complex.
  • Standardization: Lack of industry-wide standards for AI deployment creates uncertainty.
  • Transparency and Trust: Operators and regulators need confidence in AI decisions—black-box models can be problematic.

Case Studies: AI in Action

Singapore’s PUB (Public Utilities Board)

Singapore has implemented AI for real-time monitoring and predictive analytics across its NEWater plants. The result? Improved reliability, reduced operational costs, and enhanced water reuse capabilities.


Veolia Water Technologies

Veolia uses ML algorithms to optimize chemical dosing and aeration in European facilities. The outcome: up to 15% energy savings and improved effluent quality.


US Municipal Pilot Projects

Several U.S. cities have tested AI-based predictive maintenance for pumps and blowers. These pilots have shown significant reductions in emergency repairs and extended equipment lifespan.


The Bottom Line

AI and ML offer wastewater treatment facilities a pathway to smarter, greener, and more resilient operations. While challenges remain—cost, data integrity, and workforce readiness—the potential benefits are too significant to ignore. The future of wastewater management will likely be a hybrid of human expertise and machine intelligence, working together to protect our most vital resource: water.


What’s Next?

As AI becomes more accessible and affordable, expect to see broader adoption across the industry. Facilities that embrace these technologies early will gain a competitive edge in efficiency, sustainability, and compliance.

Tuesday, January 7, 2025

More Inconvenient Truths

In 2006, Al Gore made the headlines with the documentary An Inconvenient Truth. Now I have to confess I’ve never seen it, but having seen Mr. Gore in other settings, I’m not a big fan of him and probably never will.  That said, plenty of folks in the environmental world thought it was a timely film that was a clarion call to action to reduce greenhouse gas emissions to turn the tide on global warming before it's too late.  The fervor of the movement to reduce carbon emissions has ramped up in recent years, gaining political and popular momentum, some even calling it the "Biggest Threat Modern Humans Have Ever Faced" and other such hyperbole. Personally, I think it's a good idea to reduce our dependence on non-renewable energy sources (and other non-renewable materials for that matter), and to reduce particulate pollution from vehicles, but I'm not convinced that global warming is the biggest threat to our existence on Earth. My views on this have shifted over the years. The last book I read on the topic was quite compelling and worth a read: Lukewarming: The New Climate Science that Changes Everything: Michaels, Patrick J., Knappenberger, Paul C.: 9781944424039: Amazon.com: Books.

Photo by <a href="https://unsplash.com/@lazyomar?utm_source=unsplash&utm_medium=referral&utm_content=creditCopyText">Omar Ram</a> on <a href="https://unsplash.com/wallpapers/nature/sky?utm_source=unsplash&utm_medium=referral&utm_content=creditCopyText">Unsplash</a>


OK, so global warming may or may not be an inconvenient truth, depending on your viewpoint. What is evident to me as an environmental engineer is that there are several other truths that are even more inconvenient with respect to humanity's impact on the Earth. A few years ago I read a very interesting book called "The Human Quest" by Johan Rockström and Mattias Klum that presented the idea of planetary boundaries. The figure below summarizes their opinions nicely.  



Things shown in red are higher risk of causing problems beyond what the natural environment can handle, green are within the ability of the environment to deal with them, and the yellows are in-between with some uncertainty on their risk.  What's interesting to me, with all the press around climate change is that it's in the yellow zone for these guys, whereas biochemical flows for phosphorus and nitrogen are firmly in the red, along with genetic diversity.

As a wastewater guy, I'm not surprised by this as eutrophication caused by nutrient emissions have been a hot topic for as long as I've been a poop engineer, grey hair and all (I actually started my career doing research into biological nutrient removal).  What's a little frustrating is all the energy and media focus going into climate change when we have bigger problems and higher environmental risks posed by nitrogen and phosphorus and yet the media and the politicians doggedly focus on carbon.  Even within the wastewater world folks are spending their time and effort looking at "decarbonization" when the impact is probably less than 1% of all human emissions of CO2e - I even helped to write a chapter in a book on the whole topic! Shame on me, I guess.

I would love for there to be a bigger focus on phosphorus and nitrogen. Maybe with all the buzz about the "circular economy" thanks to the furor over climate change we'll take a closer look at how phosphorus and nitrogen are moved around the Earth, and the human impact on them. I dunno, I have a feeling the water industry will get sidetracked on plastics or PFAS or some other minor pollutant whilst we do very little to restore the nutrient cycle.

So what do you think?