Advanced Anaerobic Digestion (AAD)

Biogas plant with high-efficiency mixing technology

Achieving Full Mixing - No Dead Space

Improve digestion efficiency with a mixer capable of moving up and down / left and right (10° ~ 350°).

Suppression of upper scum and prevention of lower sediment sedimentation by preventing the occurrence of dead space in the digester
Mixing efficiency verified by computational fluid dynamics (CFD) analysis
Determination of mixer specifications / no. of units considering inlet solid concentration and digester capacity / shape
Easy to attach and detach during installation and maintenance, enabling easy and efficient maintenance

What is Anaerobic Digestion(AD)?

- An established technology to decompose organic matter into methane and carbon dioxide through different steps of hydrolysis, acid fermentation, and methane fermentation in oxygen-free environment

C₆H₁₂O₆ → 3CH₄ + 3CO₂

- Energy input is low because there is no oxygen supply, and sludge generation is low because anaerobic microorganisms with a slow growth rate are used

- AD is implemented for organic waste volume reduction and renewable energy production facilities

Additional Value from Organic Wastes

•Renewable energy(biogas) production by AD / various application of the biogas

•Producing high value materials from the organic wastes

•Contribution to carbon neutrality by utilizing biogas

Applications

Solubilization of Sludge

For increased production of biogas: more than 120% increase in biogas production (compared to non-solubilization) / 30% reduction in residence time in anaerobic digester

Organic Waste to Energy

Simultaneous solubilization and reduction achieved. Biogas production increase of 140% or more (compared to non-solubilization) / sludge reduction rate of 90% achieved.

Energy Production Process

For energy self-sufficiency in sewage treatment plant.

Miryang City Livestock Excrement Public Treatment Facility

Electricity Cost 122M KRW/y SAVED

CO2 Emission 6,200t/y Reduced

Facility capacity: Total 100 tons/day (livestock manure 80 tons/day, food 20 tons/day)

Methane production rate: 0.40 Nm³ CH₄/kgVS (design)
Organic matter removal rate: 70.0% (design)

The AAD Advantage

Consistent Efficiency

Sediment deposition is sent through an agitator capable of up and down/left and right flow.

Stable Biogas Production

Even when the inflow TS is 8% or more our technology can output consistent levels of biogas.

Convenient Operation

Equipped with an automatic control system linked with digester and measurement equipment.

Reduce OPEX

With maximized efficiency, less energy usage and less maintanance

Featured AAD References

Miryang City Livestock Excrement Public Treatment Facility

- Facility capacity: Total 100 tons/day (livestock manure 80 tons/day, food 20 tons/day)

- Methane production rate: 0.40 Nm³ CH₄/kgVS (design)

- Organic matter removal rate: 70.0% (design)

Daegu City Organic waste resources integrated energy facility

- Facility capacity: Total 20 tons/day (food 18 tons/day sewage sludge 2 tons/day)

- Methane production rate: 0.51 Nm³ CH₄/kgVS (130% compared to design)

- Organic matter removal rate: 86.8%

Daejeon Sewage Treatment Plant Modernization Project (under design)

- Facility capacity: Total 727 tons/day (sewage sludge 727 tons/day)

- Methane production rate: 0.25 Nm³ CH₄/kgVS (design)

- Organic matter removal rate: 55.0% (design)

Hongcheon Green Energy Town

- Facility capacity: Total 100 tons/day (livestock manure 80 tons/day, food waste 20 tons/day)

AAD References

      Year
      Name
      Location
      Capacity
      Comments
    

  
      2015
      Hongcheon Green Energy Town
      Hongcheon, Korea
      100 tons/day
(Livestock Manure 80 + Food Waste 20)
      Operating AAD (Mesophilic 2 Digesters)
    

      2021-2022
      Organic Waste Resource Integrated Energy Demonstration Facility
      Daegu City, Korea
      20 ㎥/day
(Food Waste 18 + Sewage Sludge 2)
      National Research Program Completed AAD + AMX
    

      2022
      Miryang Public Livestock Manure Treatment Plant
      Miryang City, Korea
      100 ㎥/day
(Livestock Manure 80 + Food Waste 20)
      Operating AAD (Mesophilic 2 Digesters)
    

      2023
      Livestock Manure Public Treatment Facility
      Gimhae City, Korea
      200 ㎥/day
(Livestock Manure 150 + Food Waste 50)
      Currently Seeding + Startup
AAD (Mesophilic 3 Digesters)
    

      2026 (Expected)
      Hwacheon Public Livestock Manure Treatment Plant
      Hwacheon-gun,
Gangwon-do, Korea
      90 ㎥/day
(Livestock Manure 73 + Food Waste 17)
      Under Construction
AAD (Mesophilic 2 Digesters)
    

      2026 (Expected)
      Muan Public Food Waste Treatment Plant
      Muan-gun, Korea
      40 ㎥/day
(Food Waste) 
      In Design
AAD + AMX
    

      2027 (Expected)
      Seongju Integrated Bio-energy Plant
      Seongu-gun,
Gyeongsangbuk-do, Korea
      150 ㎥/day
(Livestock Manure 116 + Food Waste 12 + Dewatered Sewage Sludge 7 + Agricultural Residues 15
      In Design
AAD (Mesophilic 2 Digesters)
    

  
      2028 (Expected)
      Daejeon Sewage Treatment Plant Modernization Project
      Daejeon City, Korea
      840 ㎥/day
(Municipal WWTP Sludge)
      Under Construction
Draco THP + AAD + AMX
    