Avancerad PFAS-rening av lakvatten

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Advanced PFAS Treatment for Complex Wastewater Streams, Including Landfill Leachate

Mellifiq develops and delivers advanced treatment solutions for complex industrial and municipal applications.

illustration Avancerad PFAS-rening av lakvatten 1

One of the most challenging water types for treatment processes is landfill leachate, as it is characterized by significant variations in contaminants (such as PFAS), flow dynamics, and organic content. The incoming water exhibited substantial fluctuations in contaminant concentrations over time, influenced by rainfall, seasonal changes, microbiological processes, and operational strategies.

By combining data-driven analysis, engineering expertise, and advanced process technology, Mellifiq developed a complete, modular, and containerized PFAS treatment plant. The solution was designed to ensure stable performance, high removal efficiency, and robust operation regardless of water quality or hydraulic load.

The Challenge

A Complex PFAS Profile in a Dynamic Environment

The PFAS challenge in landfill leachate environments is often multifaceted. Concentrations can be high, but more importantly, they can fluctuate rapidly. Certain sub-streams repeatedly exhibited peak concentrations of short-chain PFAS compounds, while others contained higher levels of long-chain PFAS substances, which are traditionally more difficult to treat.

In addition, water flows from landfill sites are affected by peak rainfall events, variations in biological activity, and storage ponds that are periodically emptied, creating significant hydraulic fluctuations. This required a solution capable not only of achieving a high removal rate, but also of handling rapid changes in flow, suspended solids content, and chemical composition.

The result was a treatment system that combines flexibility, performance, and precision, ensuring reliable PFAS removal under highly variable operating conditions.

Mellifiq’s technical solution

A Fully Integrated, Modular PFAS Treatment Process

To meet these requirements, Mellifiq developed an advanced PFAS treatment process based on three core stages.

1. Electrocoagulation

A high-performance treatment stage based on our proprietary technology, designed to destabilize both long-chain and short-chain PFAS compounds while reducing organic matter, metals, and colloidal contaminants. Through electrocoagulation, Mellifiq enables a flexible and robust treatment process that is particularly well suited for landfill leachate with highly variable characteristics. The system rapidly adapts to changes in water chemistry, ensuring stable and reliable treatment performance even under fluctuating operating conditions.

2. Flotation

An optimized separation technology that efficiently removes PFAS-bearing flocs and particles. The technology is robust even during flow peaks and at high particle loads, making it ideal for water from waste facilities.

3. Polishing

A specially designed polishing stage based on a CoraLuxe membrane filtration system, where several advanced separation mechanisms work together to ensure the removal of fine particulate matter as well as remaining PFAS-associated complexes. This stage is critical for achieving a stable, reproducible, and consistently high reduction rate of PFAS in treated water streams.

The three stages described above were integrated into three compact, modular, containerized units, enabling rapid deployment, easy maintenance, and a minimal site footprint. At the same time, the solution features full automation, advanced control logic, continuous monitoring sensors, and a traceable process history, all designed to ensure high operational reliability and consistent, reproducible treatment quality.

Engineering Methodology

From Analysis to a Reliable Operational Plant

The project was carried out using Mellifiq’s structured methodology, with each step based on a quality-assured engineering process and documented procedures.

Data Collection and Analysis	We analyzed several years of historical water sampling data, flow rate variations, peak concentration events, and operational patterns.
Process and Mechanical Design	Development of PFDs, P&IDs, automation logic, and plant layout.
Manufacturing and Factory Assembly	Internal installations are always completed and inspected prior to transport.
Installation and Site Assembly	Lifting operations, piping connections, power supply integration, and safety procedures were implemented.
Commissioning and Verification	FAT, SAT, and process optimization were carried out, along with training for operations and maintenance personnel.
Operation and Optimization	Continuous monitoring of PFAS reduction performance, process trends, and measurement data.

Potential Reuse as Technical Water

Mellifiq is uniquely positioned to offer complementary treatment technologies such as Ozonetech systems, which can be adapted to hygienize and disinfect treated landfill leachate through advanced oxidation. This enables, among other applications, the reuse of the treated water as technical water, with water quality tailored to specific requirements.

Mellifiq also provides advanced desalination solutions for the production of high-quality technical water and process water. In combination with our ozone systems and CoraLuxe membrane filtration, dissolved salts and other contaminants can be effectively removed, ensuring reliable water quality even for demanding industrial applications.

Results

A Market-Leading PFAS Treatment Solution

The completed treatment plant combines technical excellence, operational stability, and flexibility. The process ensures high PFAS removal efficiency even under challenging influent concentrations and fluctuating flow conditions. Mellifiq’s solution represents modern engineering in practice: a combination of reaction chemistry, hydrodynamics, automation, materials engineering, and quality management. For waste management operators seeking a future-proof PFAS treatment solution, Mellifiq offers a technologically superior, operationally optimized, and sustainable path forward.