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Sludge & energy

METHANATOR™

Anaerobic digestion and biogas upgrading through to bioCNG.

Anaerobic digestion that turns organic load into methane-rich biogas: available as CSTR, UASB or AnMBR depending on the stream.

The METHANATOR technology is an advanced anaerobic digestion system that efficiently converts organic waste into methane-rich biogas through optimized microbial processes. Employing reactor configurations such as Continuous Stirred-Tank Reactors (CSTR), Anaerobic Membrane Bioreactors (AnMBR), and Upflow Anaerobic Sludge Blankets (UASB), it enhances the breakdown of organic matter under controlled, oxygen-free conditions. The result: higher methane yields, stabilized digestate, and significant energy recovery, ideal for sustainable waste management, renewable energy generation, and lower greenhouse-gas emissions.

METHANATOR anaerobic digesters reflected in a clarifier at the Zalaegerszeg wastewater treatment plant, Hungary

How it works

The process

The METHANATOR converts organic waste into biogas by anaerobic digestion, carried out by microorganisms in the absence of oxygen. The organic material breaks down in stages, hydrolysis, acidogenesis, acetogenesis and methanogenesis, producing biogas that is mostly methane and can be used as a renewable fuel. The process also yields liquid digestate and digested sludge, which can be repurposed or treated further. Reactor choice follows the stream: CSTR for high solids, UASB where TSS is low and COD high, AnMBR for ultra-high concentrations.

Specifications

Reactor configurationsCSTR, UASB, AnMBR
Mesophilic operation37–41 °C
Thermophilic operation52–55 °C
Breakdown stagesHydrolysis, acidogenesis, acetogenesis, methanogenesis
ProductsMethane-rich biogas, liquid digestate, digested sludge

Key advantages

  • Efficiently treats both wastewater and organic waste
  • Suitable for sewage sludge, biomass and industrial wastes
  • Mesophilic and thermophilic options
  • CSTR, UASB and AnMBR configurations available
  • Recovers energy instead of paying to aerate the load
  • Produces a stabilised digestate
METHANATOR anaerobic reactor at the Kall Ingredients plant, Tiszapüspöki, Hungary

Gallery

METHANATOR digesters and gas equipment tower at the Zalaegerszeg wastewater treatment plant, Hungary
Zalaegerszeg: digesters and gasholder
METHANATOR anaerobic reactor at the Kall Ingredients plant, Tiszapüspöki, Hungary
Kall Ingredients (Tisza-TK): anaerobic reactor
Twin METHANATOR digester towers at the Zalaegerszeg wastewater treatment plant, Hungary
Zalaegerszeg: digester towers

Where it is applied

CSTR: high solids
  • Food industry
  • Agriculture
AnMBR: ultra-high concentrations
  • Breweries
  • Distilleries
UASB: low TSS, high COD
  • Chemical
  • Pharmaceutical
  • General industrial
21
Plants delivered
6
Countries
86,854
m³/day capacity
1988
First plant

Reference plants

The largest 5 of 21 plants delivered with METHANATOR, 1988–2017.

PlantLocationCapacityYearProcess
NagykanizsaNagykanizsa, Hungary21,250 m³/day2012ACTIVATOR · METHANATOR
BékéscsabaBékéscsaba, Hungary20,000 m³/day2012ACTIVATOR · METHANATOR
EgerEger, Hungary19,700 m³/day2017METHANATOR
ZalaegerszegZalaegerszeg, Hungary17,000 m³/day2010ACTIVATOR · METHANATOR
Kall Ingredients (Tisza-TK)Tiszapüspöki, Hungary5,500 m³/day2015BIODEC S 200 ×4
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