Why the Biomix Pump system improves performance in biogas digesters

February 25, 2026

In modern anaerobic digestion plants, performance is not only defined by gas yield, but by operational stability, controlled feeding, and reduced downtime. The biomix pump system plays a critical role in achieving these objectives.

At Kronoa, the Biomix pump has been specifically engineered to combine robust mixing and progressive cavity pumping in a single, integrated unit. The result is improved substrate homogenisation, better flow control, and enhanced process reliability in biogas digesters.

How the Biomix pump improves substrate preparation

One of the key factors affecting digester performance is substrate consistency. Variations in dry matter, poor homogenisation, or the presence of heavy solids can create feeding instability and reduce microbial efficiency.

The biomix pump addresses this by:

Mixing substrates before pumping into the anaerobic digestion process
Reducing the proportion of dry matter in the main substrate to be pumped
Improving overall homogeneity prior to digestion

By ensuring a more uniform substrate composition, the biomix pump helps stabilise the hydrolysis stage, often the rate-limiting step in biogas production, leading to more consistent gas output and improved biological performance.

Biomix pump design features that enhance stability

Robust progressive cavity mixing system

The Kronoa Biomix Premium Series is a robust mixing progressive cavity pump designed for demanding industrial environments. Its heavy-duty mechanical construction and increased blade thickness allow it to handle:

Abrasive liquids
High-viscosity media
Substrates with high dryness
Dewatered sludge
Industrial residues such as pulp and pastes

This mechanical strength ensures that the biomix pump operates reliably even under variable and complex feeding conditions typical of biogas plants.

Integrated decanting system for heavy solids removal

In biogas facilities, improper medium arrival is common. Heavy particles and unwanted solids can enter the system, increasing wear and destabilising flow.

All units in the Biomix mixer series incorporate an integrated decanting system in the tunnel area, specifically designed to remove the heaviest solids before they interfere with pumping performance.

This feature directly contributes to:

Reduced mechanical stress
Lower risk of clogging
Improved operational continuity

By protecting internal components, the biomix pump supports long-term plant stability and lower maintenance frequency.

Why the Biomix pump system increases biogas plant performance

1. Improved feeding stability

Consistent substrate preparation reduces fluctuations in digester loading. Stable feeding means:

More predictable microbial activity
Reduced risk of acidification
Improved overall gas yield stability

The Biomix pump ensures that mixing and pumping occur as a controlled, integrated process rather than as two separate operations.

2. Lower mechanical downtime

Thanks to its modular design and quick disassembly system with a fully standardised IEC drive, maintenance tasks are simplified. Faster servicing directly translates into:

Reduced downtime
Lower operational costs
Greater plant availability

In high-throughput biogas installations, this operational efficiency is critical.

3. Better adaptation to complex industrial applications

Beyond biogas digesters, the Biomix pump is suitable for other industrial processes requiring mixing and pumping of abrasive or high-viscosity fluids.

Its modular construction allows for easier integration into existing systems, supporting long-term adaptability as plant conditions evolve.

Why the Biomix pump is more than a mixer

The Kronoa Biomix pump is not simply a mixing device. It is a performance-enhancing system designed to:

Optimise substrate consistency
Protect internal components
Improve digestion stability
Increase plant uptime

In biogas operations, where feeding inconsistency can directly impact methane production, the Biomix pump system becomes a key contributor to process reliability and long-term profitability.

A strategic component for stable biogas production

When evaluating equipment for anaerobic digestion plants, the focus should not only be on pumping capacity but on how the system influences biological stability and mechanical reliability.

The Kronoa Biomix pump combines robust engineering, integrated solids management, and modular maintenance-friendly design to directly improve digester performance.

For operators seeking higher efficiency, reduced downtime, and stable gas production, the Biomix pump system is not an accessory, it is a strategic asset.

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