[Natalia Bourenane]

@ebara_serge it depends to what technology you are comparing anaerobic digestion. Can you provide more details?

[Tejas]

Hi Serge,

The efficiency mostly depends upon the technology and type of feedstock.

E.g. easy feedstock with less lignin and other impurities will give high efficiency. Let us not talk about efficiency but high VS destruction rate which is more technical and widely used to compare.

E.g. Technology/process like Plug Flow is much superior than traditional CSTR which gives at least 20% higher biogas yield compare to CSTR.

[Natalia Bourenane]

@Tejas have you heard of High Performance Digesters? One of our members is offering this solution and I wonder if you ever included this in your research?

[Tejas]

Hi Natalia,

Yes, we, Arciplug are providing high efficient Dry Plug Flow reactors. I would like to know the other offerings.

[Natalia Bourenane]

HPD is high performance digester that is sold by Fournier Industries in the North America. You can check their quick presentation by @Scott.McKay at https://youtu.be/JNV2PzJ_iGk

[Dave]

Lots of good reasons for plug-flow, lots of good reasons for CSTRs too; same goes for high-rate, low-rate, temperature-phased, pH-phased, and the many other configurations available. In more than 30 years experience with AD systems of most sizes, shapes, and configurations, never seen a blanket declaration of ‘superior’ to be universally true for all projects, locations, feedstocks, operations, and business objectives.

[Vanita]

Anaerobic digester efficiency depends mainly on how much of the feedstock’s theoretical methane potential (BMP) can actually be converted into methane, which in practice is usually 70–85% for well-designed plants . The largest efficiency losses occur during hydrolysis of complex biomass (especially lignocellulosic materials like straw), followed by biological imbalance, digester design limitations, and minor losses in gas leakage and upgrading. Reactor type also influences performance: two-stage digesters typically achieve the highest methane recovery (80–90% of BMP), while CSTR and plug-flow systems usually achieve around 70–85%. In real plants, realistic expectations should consider these losses to avoid overestimating gas production in project planning.

[Hatem]

Agree.

The BMP test provides the ground truth on the actual methane potential and biodegradability of the feedstock. Using our analysis tool, the BMP curve is fitted to appropriate kinetic models to determine the key degradation parameters, particularly the substrate conversion and methane production rates. These calibrated kinetic parameters are then used as inputs in our plug-flow reactor (PF) simulations, allowing our clients to predict the expected biogas production profile and evaluate whether a plug-flow configuration is suitable for their specific feedstock.

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hatem.yazidi@gazeol.com - Plug Flow Reactor

hatem.yazidi@gazeol.com - Plug Flow Reactor