To remember
- Maximize energy recovery
- Reduce sludge volume and costs
- Flexible, proven configurations
High performance anaerobic digestion for wastewater biosolids
Digelis is our anaerobic digestion technologies family, mesophilic, thermophilic, TH - turbo (with thermal hydrolysis), and modular digesters, designed to stabilize sludge, reduce volumes, and recover biogas for energy. Digelis systems achieve 20–40% sludge volume reduction compared to treatment lines without anaerobic digestion, with conventional mesophilic digestion typically delivering ~33% volume reduction. Digelis systems adapt to mixed sludges and diverse loading scenarios to improve sustainability and cut disposal costs.
Digelis digesters convert organic sludge into stabilized biosolids while capturing biogas for heat and power. Configurations range from classic mesophilic reactors to Digelis TH enhanced digestion combining thermal hydrolysis and boosted biodegradability for increased biogas yield, reduced sludge mass, and improved dewaterability. Our engineers match reactor size, mixing strategy, and pretreatment to plant hydraulics and biosolids targets, delivering turnkey design, installation, and commissioning for municipal and industrial plants.
The Digelis product line delivers a comprehensive suite of anaerobic digestion (AD) solutions tailored to the needs of wastewater treatment plants and industrial facilities. Each Digelis system is designed to optimize sludge stabilization, reduce volume, and maximize biogas production, — while supporting energy recovery and sustainability goals.
Digelis
uses mesophilic AD for reliable, energy‑efficient sludge treatment
Digelis Fast
applies thermophilic AD to accelerate digestion and boost biogas output
Digelis TH
combines thermal hydrolysis with AD to enhance biodegradability and reduce residuals
Digelis BH
integrates biological hydrolysis with AD for improved organic breakdown and digestion kinetics
Together, Digelis TH and Digelis BH represent advanced AD technologies, incorporating hydrolysis to unlock higher performance and greater energy recovery. Whether upgrading existing infrastructure or designing new treatment lines, Digelis systems offer proven, flexible solutions for modern sludge management.
Increase biogas production and energy recovery
Digelis maximizes methane recovery through optimized biological conversion and, where applicable, thermal hydrolysis pretreatment, turning waste sludge into a reliable renewable energy stream that can offset plant power and heat needs
Enhanced configurations such as Digelis TH use thermal hydrolysis to break cell walls and solubilize organic matter, markedly increasing volatile solids destruction and biogas yield. Digelis BH (Biological Hydrolysis) increases net biogas production by up to 25% compared to conventional AD, while Digelis TH (Thermal Hydrolysis) delivers up to 54% higher net biogas production versus conventional mesophilic digestion. Recovered biogas can be used in combined heat and power (CHP) units, boilers, or upgrading systems for grid injection or vehicle fuel, supporting energy self-sufficiency and lowering net plant greenhouse gas emissions.
Reduce sludge volume and improve dewaterability
Digelis technologies reduce sludge mass by converting organics to biogas and improving dewatering performance, often achieving substantial dry matter gains and smaller biosolids volumes for transport or further processing.
By promoting enhanced volatile solids reduction, Digelis lowers the volume of material requiring disposal. Advanced Digelis configurations can double the digestion capacity of existing installations while producing Class A biosolids suitable for beneficial reuse. Thermal hydrolysis pretreatment increases the fraction of readily digestible matter, delivering drier biosolids after dewatering and reducing haulage costs and landfill dependency. 2-phased Digelis BH will promote biological hydrolysis, while optimizing retention times. Operators benefit from fewer waste handling steps and improved solids management economics.
Flexible designs for varied feedstocks and scales
Digelis systems are adaptable to primary, secondary, mixed or industrial sludges and sized from compact modular units to large continuous digesters, making them suitable for new builds, upgrades, and retrofits across utility footprints.
We configure Digelis reactors to local loadings, temperature regimes (mesophilic or thermophilic where required), and site constraints. Digelis Fast (thermophilic digestion at 55°C) reduces digester size by 40% compared to conventional mesophilic digestion, with two-fold faster digestion reaction kinetics and heat savings of 35–50% when equipped with spiral heat exchangers. Full scale concrete or metal digesters serve high-capacity facilities. The modular Digelis Simplex design enables 6-week erection times for metal digesters up to 7,000 m³, reducing construction schedules and site disruption. Integration with existing tanks, heat recovery, and control systems simplifies retrofit projects and phased capacity increases.
Improve biosolids stability and odor control
Digelis stabilizes organic matter to reduce biological activity, pathogen risk, and odor potential in biosolids, producing a more manageable end product for disposal, land application, or further processing.
Through controlled anaerobic digestion, Digelis lowers volatile solids and stabilizes sludge constituents, reducing odor and minimizing posttreatment pathogen regrowth. Stabilized biosolids meet quality expectations for beneficial reuse pathways or safe disposal, and we support operators with monitoring protocols and process controls to sustain consistent biosolids quality.
Environmental benefits and sustainability outcomes
Deploying Digelis reduces landfill disposal, recovers renewable biogas, lowers fossil energy use, and cuts greenhouse gas emissions, aligning sludge management with utilities’ circular economy and climate goals.
By valorizing sludge as an energy resource and shrinking biosolids volumes, Digelis helps utilities transition from waste centric operations to resource recovery hubs. Reduced transport, lower chemical demand, and renewable energy generation contribute to lifecycle emissions reductions and improved municipal sustainability metrics, supporting regulatory compliance and community environmental commitments.
Frequently Asked Questions
Digelis optimizes temperature, mixing, and retention time, and with Digelis TH adds thermal hydrolysis pretreatment and Digelis BH adds biological hydrolysis, to boost volatile solids destruction and methane yield.
Digelis handles primary, secondary, mixed municipal sludges and many industrial sludges with tailored reactor sizing and pretreatment options.
Yes. Digelis offers modular and full-scale designs that can be integrated or retrofitted into existing digestion trains to increase capacity or add thermal pretreatment.
Digelis recovers biogas for onsite CHP, boilers, or upgrading—reducing plant fossil energy use and helping achieve energy self-sufficiency targets.