AI water treatment: how predictive control transforms energy efficiency for WWTPs in Korea

Published: 2026/01/08

Energy costs devour up to 30% of operational budgets at South Korean wastewater treatment plants. As electricity prices surge and environmental regulations tighten, plant directors face a critical question.

How can we maintain compliance, cut costs, and meet carbon neutrality targets simultaneously? 

The answer lies in AI-powered predictive control, already transforming operations at facilities like Kleannara Water.

Today, a new generation of smart water management is emerging, powered by artificial intelligence (AI), machine learning, and predictive control. These technologies are already reshaping operations for hundreds of plants in Europe and are now being implemented in South Korea, including at the wastewater treatment facilities at Kleannara. 

The promise: to optimize every process, from aeration to pumping, in real time, slashing energy use, reducing costs, and ensuring environmental compliance.

Quick Facts: 

  • 40% of OPEX
  • 12-18 months ROI
  • Up to 40% GHG reduction
  • Zero system replacement needed

How AI-driven predictive control is reshaping water treatment in South Korea

  • Energy costs in water treatment can be cut by 20-36% through AI-powered optimization of aeration, pumping, and chemical dosing.
  • Predictive control enables real-time adaptation to changing conditions, reducing GHG emissions by up to 40% and ensuring regulatory compliance.
  • Digital twins and machine learning provide granular insights, anomaly detection, and predictive maintenance, improving reliability and reducing downtime.
  • Flexible deployment models and robust cybersecurity make these solutions suitable for both municipal and industrial plants.
  • Real-world deployments show ROI achieved in 12-18 months, with some plants recovering investment costs through energy savings alone within the first year.

AI and predictive control are not just technological upgrades, they are strategic levers for operational excellence and sustainability in the water sector.

AI 기반 예측 제어기술

The energy and compliance challenge: what keeps water sector leaders awake at night

Directors and managers of WWTPs and DWTPs in South Korea are under pressure from multiple fronts. Rising electricity prices threaten operational budgets, while stringent discharge regulations demand ever-tighter process control. At the same time, the sector is expected to contribute to national carbon neutrality goals, with GHG emissions from water treatment, especially nitrous oxide (N₂O) and CO₂, under the microscope.

Traditional automation systems, while reliable, often lack the agility to respond to real-time fluctuations in influent quality, weather, or energy tariffs.

This can lead to 4 critical pain points driving the need for intelligent automation:

  • Inefficient aeration: Aeration is the single largest energy consumer in most WWTPs. Without dynamic control, blowers may run longer or harder than necessary, wasting energy and increasing costs.

  • Overflow and compliance risks: Pumping stations and networks can be caught off guard by sudden rain events, leading to overflows and environmental incidents.

  • Excessive chemical use: Manual or static dosing of chemicals for phosphate removal or disinfection can result in overuse, higher costs, and increased sludge production.
  • Unplanned downtime: Without predictive maintenance, equipment failures can disrupt operations, increase OPEX, and threaten compliance.

These challenges are compounded by the need for granular, actionable data, not just for compliance reporting, but for continuous improvement and strategic decision-making.

AI-powered solutions: from digital twins to real-time optimization

The latest generation of water treatment AI solutions is built on two unique layers: real-time control and self-learning algorithms. Here’s how they work:

1. Data integration and digital twin creation

AI platforms collect and analyze data from every corner of the plant PLCs, sensors, SCADA systems, and even external sources like weather forecasts and energy prices. This data feeds into a digital twin: a virtual model that mirrors the plant’s behavior, simulating how changes in process parameters will impact performance, energy use, and compliance. The platform integrates seamlessly with existing infrastructure, no need to replace PLCs or SCADA systems. Installation typically takes 2-3 months with minimal operational disruption.

2. Predictive analytics and process control

Machine learning models continuously analyze historical and real-time data to predict future trends, such as influent load, ammonia concentrations, or energy demand. The system then runs simulations to identify the most efficient control strategies, automatically adjusting setpoints for blowers, pumps, and chemical dosing in real time.

  • Aeration system optimization: By anticipating oxygen demand and adjusting blower speeds dynamically, plants can reduce aerator operating time by up to 25%, cutting energy use and costs.
  • Pumping and storage management: AI schedules pumping cycles to avoid peak energy tariffs and maximize off-peak usage, ensuring storage levels meet predicted demand.
  • Chemical dosing: Real-time monitoring and simulation enable precise chemical dosing, reducing consumption by up to 50% while maintaining discharge compliance.

3. Continuous learning and anomaly detection

The system’s self-learning capabilities mean it gets smarter over time, refining its models as new data comes in. It also detects anomalies, such as leaks, clogs, or abnormal energy consumption, alerting operators before issues escalate.

Quantified results: real-world case study

Case study: Kleanara (South Korea)

Kleannara, a Pulp & Paper industry customer in Cheongju, Veolia provides water treatment and wastewater treatment services.

Solution: Through the introduction of AI water treatment solutions into wastewater treatment processes, we intend to reduce power consumption by stably managing TOC in the process and improving energy efficiency.

Benefit

  • Stabilize operations: Strengthen water quality stability through TOC management
  • Optimization with Energy Saving: Energy Optimization to reduce power costs (approximately 7%)
  • Ensure customer operational reliability and improvement efforts
  • Reduction in GHG emission 

Veolia provides a strategic solution to achieve our customers' carbon neutrality target by reducing energy resources and optimizing operational services through most efficient operational strategies with advanced AI technology.

깨끗한나라 수처리현장

Funding, incentives, and regulatory context

South Korea’s water sector is supported by a range of government initiatives and incentives aimed at digital transformation and sustainability:

  • K-water Smart Water City Program: Supports the adoption of IIoT and AI for water management.
  • Green New Deal: Offers funding for projects that reduce GHG emissions and improve energy efficiency in municipal infrastructure.
  • Regulatory compliance: Stricter discharge and GHG reporting requirements are driving demand for advanced process control and real-time monitoring.

Additional incentives may be available for projects that demonstrate significant energy savings or contribute to national carbon neutrality targets.

Plants implementing AI solutions may qualify for accelerated depreciation under Korea's Green Technology Investment Tax Credit, potentially recovering 10-20% of implementation costs.

Implementation roadmap: from pilot to full-scale deployment

Adopting AI water treatment solutions is a structured process, designed to minimize disruption and maximize value:

  1. Initial assessment: Define objectives, review existing infrastructure, and identify key pain points.
  2. Pilot project: Deploy the platform on a single process or site, integrating with existing SCADA and sensors.
  3. Data collection and model training: Gather operational data, create the digital twin, and calibrate predictive models.
  4. Optimization and control launch: Activate real-time control, monitor performance, and refine algorithms.
  5. Scale-up: Expand deployment to additional processes or sites, leveraging centralized or distributed architecture as needed.
  6. Continuous improvement: Ongoing support, updates, and performance reviews ensure sustained benefits.

Typical pilots can deliver measurable results within 2-3 months, with full ROI often achieved in under 18 months.

Frequently Asked Questions (FAQ)

A: No. The platform integrates with your current PLCs and SCADA infrastructure.

A: Pilot projects deliver results in 2-3 months; full deployment typically within 6 months.

A: The system features certified data centers, intrusion prevention, and local control verification.

A: The solution scales from small municipal plants to large industrial facilities, with customizable control strategies.

A new era for water sector leaders in South Korea

The convergence of AI, predictive analytics, and digital transformation is opening a new chapter for water and wastewater treatment in South Korea. By embracing these technologies, directors, managers, and technical leaders can:

  • Cut energy costs and reduce carbon footprint, meeting both financial and environmental targets.
  • Enhance operational reliability, with predictive maintenance and real-time anomaly detection.
  • Ensure compliance and future-proof operations, adapting to evolving regulations and stakeholder expectations.
  • Unlock new value from existing assets, without the need for major capital investment.

The journey to smart water management is underway. Early adopters are already reaping the rewards, and the path is clear for others to follow. The time to act is now, transform your plant’s performance, sustainability, and resilience with AI-powered predictive control.

With proven results at Kleannara and strong government support, South Korean WWTPs have a unique window of opportunity. Early adopters will not only capture immediate energy savings but position themselves as sector leaders in the transition to smart, sustainable water management.