The “Nénufar” Gasometer: Smart Gas for Stronger Biogas Performance

By Methalac

As biogas developers seek to maximize efficiency and profitability, one technology is emerging as a quiet but powerful driver of performance —“Nénufar” Gasometer.

Designed to optimize gas process stability, and energy recovery, this innovation helps anaerobic digestion (AD) units achieve higher output with lower operational costs.

Inspired by Nature: The Water Lily Principle

Like its namesake — nénufar, the French word for “water lily” — the gasometer embodies balance, adaptability, and harmony with its environment.

Just as a water lily floats effortlessly on the surface while staying anchored beneath, the Nénufar Gasometer maintains perfect equilibrium between gas and liquid inside the digester.

Its floating structure follows variations smoothly, reducing membrane strain and ensuring steady performance. This natural balance underpins Methalac’s approach to efficient, reliable biogas.

Precision Feeding for Consistent Performance

Every high-performing biogas plant starts with balanced feeding. Acting like a water lily shielding the pond’s surface, the Nénufar Gasometer forms a hermetic seal over the digester to prevent gas leaks and maintain optimal conditions.

By improving the precision of feedstock handling, it minimizes biogas losses and supports consistent methane yields — a crucial factor for maximizing profitability.

Maintaining Biological Balance

Temperature fluctuations can disrupt microbial activity inside the digester. The Nénufar Gasometer promotes thermal stability, supporting optimal anaerobic degradation and preventing imbalances such as acidosis or alkalosis.

The result is a healthy, active microbial community and stable biogas production — key to long-term efficiency.

Adaptable to Any Feedstock Mix

Modern biogas facilities often process diverse inputs, from agricultural residues to municipal bio-waste. Methalac’s modular design adapts easily to liquid, solid, or mixed materials, allowing operators to respond to seasonal or regional variations while maintaining consistent gas output.

Optimizing Every Cubic Meter

By enabling precise unit sizing, the Nénufar Gasometer helps operators fine-tune residence time, loading rate, and digester capacity. This ensures stable production, maximum gas recovery, and lower maintenance costs — translating directly into improved ROI.

Sustainability and Social Acceptance

Beyond performance, the system contributes to environmental and community benefits. Its air-tight cover captures residual gases, reduces odour emissions, and prevents fugitive methane losses.

A built-in rainwater harvesting system further aligns with sustainable resource management goals.

Much like a water lily purifying the pond it inhabits, the Nénufar Gasometer enhances both its operational ecosystem and the surrounding environment.

Facilities such as MW Bioénergie demonstrate the system’s real-world impact — efficiently co-digesting agricultural and urban bio-waste streams while enhancing overall gas recovery.

From optimizing digestion conditions to boosting biogas recovery and community acceptance, Methalac’s Nénufar Gasometer stands out as a complete solution for efficient, profitable, and sustainable biogas production.

The Nénufar– proving that smarter storage, like nature’s own designs, means stronger performance.

For more information, read our Efficiency Magazine.