Wastewater treatment in extreme climate fields

An additional effect: heat is generated during microbial degradation – the so-called exothermic reaction. This typically contributes to a temperature increase of 1-1.5 °C per litre of wastewater. In hot regions, however, this effect can become critical if it adds to an already high ambient temperature. 

Proven measures: 

• Thermal insulation and reflective external surfaces to minimise solar heat radiation 

• Shading through solar panels or constructive roofing 

• Passive or active cooling (e.g. evaporative coolers, heat exchangers) 

• Use of temperature-tolerant microorganisms where possible 

Challenges in cold regions 

In regions where there is a risk of frost, heat preservation poses the greatest challenge. If the reactor temperature falls below approx. 10 °C, biological degradation slows down considerably. At temperatures close to freezing point, the process is barely functional. 

Effective countermeasures: 

• Complete container insulation 

• Electrical heating or utilisation of waste heat sources 

• Temperature-controlled process control for energy-efficient operation 

Our approach: Expertise meets system integration 

PPU Umwelttechnik is an expert in modular wastewater solutions. We develop site-specific systems that are optimised both thermally and biologically. Whether under extreme heat conditions or at sub-zero temperatures – we ensure that your containerised wastewater treatment plant works efficiently, stably and for a long time. 

During the project, engineers faced several major challenges. The freezing temperatures, dropping as low as -35 °C, required specially designed materials and components, as standard wastewater treatment systems cannot operate in such harsh conditions. Logistics also proved difficult. With very few shipping options available, the entire plant had to be sent on the only container ship traveling from England to Antarctica in October 2024. The sea voyage took about four to five weeks, so delivering everything on time was critical to make the most of the longer daylight hours in the Antarctic summer for installation and setup.

As experts in mobile, containerized wastewater treatment, we delivered a custom solution for the British research station, designed to withstand extreme conditions. Features included reinforced insulation, heat-tracing systems, and temperature-monitoring sensors. We also provided spare parts for on-site maintenance and a multi-day training course in Bayreuth to familiarize the team with the system’s design and controls.

Wastewater was treated using the tried-and-tested ClearFox® FBBR process. The entire wastewater treatment plant was installed in two 20-foot ISO sea containers. The first container contains an aerated buffer tank and a fixed-bed biological reactor for cleaning to effluent class C. The second container contains another fixed-bed biological reactor for further cleaning to effluent class N, a lamella clarifier, a sludge collection tank, a UV disinfection system and the central control unit.

The system was installed and fully tested, ensuring it was ready for operation. Researchers then completed hands-on training at our Bayreuth facility, preparing them to operate and maintain the system independently. With careful planning and coordination, the plant was delivered on time, providing reliable and sustainable wastewater treatment in one of the world’s most remote locations.

Treating wastewater in the Sahara requires systems that can handle extreme heat, sandstorms, and limited water availability. These remote sites also demand quick installation, low maintenance, and systems that operate without specialist staff or chemical inputs.

Waste water treatment with ClearFox® modular container system

Located around 600 km south of Benghazi, Messla is one of the most remote oil field sites in the region. With the existing sewage system in Messla no longer functional, the need for a reliable, modern solution was clear. The worker camps therefore approached PPU Umwelttechnik GmbH with a request for a mobile wastewater treatment plant to ensure more efficient and reliable operation in this demanding environment.

The installation started with preparing the foundation, placing the containers, and connecting all electrical and piping systems. The solid waste removal system was designed to handle strong desert winds and sandstorms, making sure the system runs smoothly even in tough conditions. The wastewater treatment system comes ready to use in 20-foot ISO containers, making it easy to move and set up anywhere.

ClearFox® mobile wastewater treatment system was designed for quick setup and dependable operation in remote or off-grid locations. Fully automated and chemical-free, it easily adapts to changing wastewater volumes and requires no specialized skills. The treated water meets European standards and is safe for reuse, including irrigation.

The system’s modular design makes it easy to expand or relocate as needs evolve. Fully equipped with key components—screening, aerated buffer, FBBR, UV disinfection, and chlorination—it’s ready for immediate operation, providing a smart, sustainable solution for efficient water reuse.