Smarter Mixing for More Efficient Biogas Operations

CHIOR HMTV and CHIOR SE support stable digestion, optimised biomass management and lower operating costs in modern biogas plants

In modern biogas plants, mixing is far more than a secondary process. It directly influences digestion efficiency, gas yield, process stability and overall plant reliability. Achieving homogeneous biomass conditions inside digesters and storage tanks is essential to prevent sedimentation, floating layers and crust formation, all of which can negatively affect anaerobic digestion and increase operational costs.

As substrates become increasingly complex due to higher solids content, changing feedstock compositions and demanding process conditions, operators require mixing technologies capable of combining reliability, efficiency and adaptability. This is where SAVECO’s CHIOR HMTV and CHIOR SE agitators deliver measurable value to biogas operators and plant designers.

Developed specifically for demanding applications in bioenergy and livestock farming, the two solutions address different installation requirements while sharing the same objective: improving mixing performance to support more stable and efficient biogas production.

The CHIOR SE Submersible Agitator is engineered for the mixing of livestock effluents, digestate and fermentation residues in open tanks and anaerobic digesters. Its specially designed stainless-steel propeller ensures high mixing efficiency even in media with elevated solids content, supporting continuous biomass movement and reducing the risk of dead zones inside the tank.

Thanks to its modular design, CHIOR SE can be configured with different propeller geometries and dimensions, allowing operators to optimise the balance between mixing intensity and energy consumption according to process requirements.
Installation is simplified by an adjustable stainless-steel guide bracket that enables fast positioning on a vertical pipe system.

In practical biogas applications, this flexibility is particularly valuable. Feedstock composition and viscosity can vary significantly depending on the substrate mix and digestion phase. CHIOR SE is designed to adapt to these variations, supporting applications ranging from primary mixing of large volumes to targeted agitation and surface crust disruption.

Efficient mixing inside digesters and storage tanks is essential to maintain homogeneous substrate conditions and improve pumping and downstream handling operations. Poor agitation can lead to inconsistent digestion behaviour, reduced gas production efficiency and increased maintenance interventions. With its engineered three-blade propeller, wide power range and service-friendly design, CHIOR SE helps operators maintain reliable process performance while optimising energy efficiency. The availability of ATEX-certified versions for the 11–22 kW range further extends its suitability for demanding biogas environments.

Complementing the submerged solution, CHIOR HMTV Agitators with External Electric Motor are designed for side-entry installation on anaerobic digesters, pre-tanks and digestate storage tanks. Their robust configuration makes them particularly suitable for applications requiring high flow rates, strong circulation and intensive mixing performance.

The HMTV series combines a large dynamically balanced stainless-steel propeller with a heavy-duty transmission system and externally mounted motor arrangement. This configuration ensures effective mixing even in challenging substrates with high dry matter content while offering a significant operational advantage: easier maintenance access.

By keeping the drive components outside the tank, maintenance activities can be carried out more quickly and safely, reducing downtime and simplifying servicing operations. For plant operators, this translates into improved operational continuity and lower lifecycle costs.

Another important benefit is the possibility to adjust the agitator inclination through a manual hydraulic cylinder, enabling more precise adaptation to changing process conditions and tank geometries. Dedicated installation configurations for both existing and newly built tanks further simplify integration into different plant layouts.

What makes CHIOR HMTV and CHIOR SE particularly effective for the biogas sector is their complementary approach to mixing. CHIOR SE provides a versatile submerged solution for efficient in-tank agitation and installation simplicity, while CHIOR HMTV delivers the accessibility and heavy-duty circulation capacity required in larger and more demanding applications.

Together, they allow biogas plant designers and operators to select the most suitable mixing technology according to substrate characteristics, tank configuration, maintenance strategy and process objectives.

As the biogas industry continues to focus on higher efficiency, process stability and long-term sustainability, reliable agitation systems play an increasingly strategic role. Effective mixing not only supports biomass movement, but also contributes directly to digestion quality, energy efficiency and operational reliability throughout the entire biogas production cycle.

With CHIOR HMTV and CHIOR SE, SAVECO offers robust and engineered solutions designed to meet the evolving demands of modern biogas plants, combining reliable performance, energy-conscious operation and long-term serviceability.

To discover more about SAVECO solutions for the biogas sector, visit SAVECO and explore the complete range of technologies dedicated to biomass treatment and anaerobic digestion.