International humanitarian and peacekeeping missions often require fully functional infrastructure to be established within a very short timeframe. Accommodation facilities, kitchens, sanitation systems, workshops, and support services all generate significant volumes of wastewater from day one.
A large international camp already operated a ClearFox® containerized wastewater treatment plant that reliably treated the wastewater generated on site. As the camp expanded, however, the number of occupants increased substantially. Consequently, the daily wastewater volume rose far beyond the original design capacity of the existing treatment system.
The operator therefore required a solution that would preserve the existing infrastructure while accommodating the significantly higher treatment demand. Beyond treatment capacity alone, practical implementation played a critical role. The camp is located in a region with limited infrastructure, where lengthy construction projects, extensive civil works, and conventional concrete treatment plants would have created major logistical challenges.
Environmental protection and public health also stood at the forefront of the project. Large camp facilities generate considerable quantities of domestic wastewater containing organic pollutants, suspended solids, nutrients, and pathogens. Without effective treatment, these contaminants enter surrounding soils and water bodies, creating environmental damage and serious health risks for both camp residents and local communities.
The project therefore required a wastewater treatment solution capable of handling high hydraulic loads, balancing fluctuating inflow conditions, and consistently delivering high effluent quality. At the same time, the system needed to maintain the flexibility and mobility that characterize modern camp infrastructure. Compact dimensions, rapid deployment, and future scalability formed key requirements from the outset.
As the camp population grew, wastewater generation increased dramatically. Although the existing treatment plant continued to operate reliably and met all performance requirements, its original capacity no longer aligned with the future demands of the site.
Constructing an entirely new treatment facility would have required significant capital investment. Such an approach would also have consumed valuable space, increased construction complexity, and rendered an already functioning infrastructure obsolete. Replacing a proven treatment system simply to achieve a higher capacity represented neither an efficient nor a sustainable solution.
The site conditions further complicated conventional approaches. Remote camp locations present substantial logistical challenges. Every shipment requires careful planning, construction resources are limited, and large-scale civil engineering projects increase both project duration and operational complexity.
In addition to the increased wastewater volume, the treatment system had to manage highly variable loading conditions. Daily camp operations generate pronounced hydraulic peaks, particularly during morning and evening hours. Biological loading fluctuates as well, placing additional demands on the treatment process. The wastewater treatment plant needed to absorb these variations while maintaining stable treatment performance and reliable compliance with discharge requirements.
The clarification stage presented another important challenge. Biological treatment processes generate biomass that must be efficiently separated from the treated effluent. Conventional sedimentation basins require large footprints to achieve effective solids removal. Camp environments rarely offer such space. The project therefore required a compact clarification technology capable of delivering high performance within a minimal footprint.
Long-term operational efficiency also remained a key consideration. The operator required a system with low energy consumption, minimal maintenance requirements, and dependable process stability. Complex treatment technologies and intensive operational demands would have increased both costs and operational risk.
The challenge extended far beyond simply increasing treatment capacity. The project required a wastewater treatment solution that preserved existing infrastructure, managed substantially higher wastewater volumes, minimized space requirements, and retained the flexibility and mobility of a containerized treatment plant.
PPU Umwelttechnik GmbH expanded the existing wastewater treatment plant by integrating additional standardized process containers into the current installation. The original system remained fully operational and became part of the expanded treatment concept. This approach eliminated the need for demolition, major reconstruction, or lengthy interruptions to plant operation.
The entire system follows the modular ClearFox® design philosophy. Each treatment stage is housed within a standardized ISO shipping container. This concept simplifies transportation, installation, and future expansion while significantly reducing the overall footprint. It also enables rapid deployment in remote locations where conventional construction methods often prove impractical.
Wastewater first passes through a mechanical screening stage. A ClearFox® screw screen removes coarse solids and protects downstream equipment from unnecessary wear and blockages. The wastewater then enters twelve aerated buffer containers providing a combined storage volume of approximately 300 cubic meters. These tanks equalize hydraulic peaks and homogenize incoming wastewater, ensuring stable operating conditions throughout the biological treatment process.
A hydraulic distribution system subsequently divides the flow evenly across the biological treatment stage. The core of the plant consists of twelve ClearFox® Fixed-Bed Biological Reactors (FBBR), which form the heart of the wastewater treatment process.
Microorganisms grow on specially engineered carrier media that provide extensive surface area for biofilm development. The wastewater passes through multiple cascaded reactor chambers, each supporting microbial communities optimized for specific treatment tasks. Fine-bubble aeration continuously supplies oxygen to the biofilm, enabling efficient biological degradation of organic pollutants.
The ClearFox® FBBR technology delivers exceptional process stability. The biofilm naturally adapts to changing operating conditions and fluctuating pollutant loads. As a result, the system reliably handles hydraulic peaks and varying wastewater characteristics while maintaining consistently high treatment performance. At the same time, the process requires only minimal operator intervention and offers low lifecycle operating costs.
Following biological treatment, the water enters two ClearFox® lamella clarifiers. The inclined lamella plates dramatically increase the effective settling area, allowing biomass and suspended solids to separate efficiently within a very compact footprint. Compared with conventional sedimentation systems, the required installation area is significantly smaller. This compact design perfectly complements the overall containerized treatment concept.
The treated water then passes through a dedicated disinfection stage combining UV treatment and chlorine dosing. This process reliably reduces pathogens and supports compliance with stringent health and environmental standards.
The plant also incorporates on-site sludge treatment. A sludge screw press dewaters excess sludge and significantly reduces its volume. This minimizes transportation requirements, lowers disposal costs, and simplifies sludge management in remote locations.
The completed expansion created a high-capacity wastewater treatment solution for a large international camp while preserving the existing treatment infrastructure. This project highlights one of the most significant advantages of the ClearFox® concept: true modular scalability. Instead of replacing functional assets, operators expand capacity simply by adding standardized treatment modules. The result combines municipal-scale treatment performance with the flexibility, mobility, and future-proof adaptability of a modern containerized wastewater treatment plant.
Yes. The modular ClearFox® concept is suitable for almost any project that lacks access to a municipal wastewater treatment network. Typical applications include camps, construction sites, mining operations, industrial facilities, refugee accommodations, military bases, resorts, and other decentralized infrastructures. Every plant is individually designed based on the wastewater volume and effluent requirements of the specific project.
Treatment capacities range from small systems processing only a few cubic meters per day to large-scale installations treating several thousand cubic meters daily. Thanks to the modular containerized design, capacity increases easily by adding additional process containers. This allows the treatment plant to grow alongside the requirements of the project.
The systems leave our production facility largely pre-assembled and factory-tested. Once delivered, only the hydraulic, electrical, and control connections between the containers require installation. Compared to conventional concrete treatment plants, this approach reduces installation time to just a few days.
The ClearFox® Fixed-Bed Biological Reactor (FBBR) utilizes a stable biofilm that grows on permanently installed carrier media. This technology offers exceptional resilience against fluctuating loads and changing wastewater characteristics. At the same time, it minimizes maintenance requirements and ensures consistently reliable treatment performance over the long term.
Yes. Large camps, industrial facilities, and temporary sites often generate significant hydraulic peak loads. Aerated buffer tanks equalize these fluctuations and provide a steady, controlled flow to the biological treatment stage. As a result, the entire treatment process operates reliably and maintains stable performance even under varying operating conditions.
Yes. All major process components are integrated into standardized ISO shipping containers. This allows the entire system to be transported by truck, rail, or vessel and recommissioned at a new location. This mobility provides a significant advantage for temporary projects and rapidly changing infrastructure requirements.
