Engineering & integration
The plant has to work as one system
Saimona evaluates and integrates digestion, gas cleaning, upgrading, compression and digestate systems through partners. Selection depends on feedstock, gas quality, capacity, offtake specification and project economics.
Integration, not a catalogue
What gets coordinated
Digestion, cleaning, upgrading, compression and digestate have to belong to one train. The pages below explain the industry options Saimona evaluates with partners — they are not a list of machines Saimona manufactures.
CSTR · Plug flow · Dry systems
Anaerobic digestion
Microbial conversion of organics to raw biogas. Reactor choice follows solids content, mixing and inhibition risk — not a brand preference.
This is the biological heart of the plant. Wet CSTR, plug-flow and dry systems each tolerate a different solids range and a different mixing story. Saimona evaluates those options with digestion partners against the feedstock you actually have, not against a preferred catalogue drawing.
H₂S and related contaminants
Gas cleaning
Hydrogen sulphide and other impurities are removed to protect upgrading equipment, compression systems and the fuel specification.
Raw biogas is a mixture, not a fuel. Sulphur, moisture and traces have to be taken out before upgrading and compression, or those machines spend their life in repair. Biological, chemical and scavenger routes exist; the right one is a project decision after the gas is characterised.
PSA · Water scrubbing · Membranes
Biogas upgrading
Carbon dioxide is separated so methane meets the offtake specification. Each route has different energy, water and pretreatment demands.
Upgrading is how biogas becomes biomethane. PSA, water scrubbing and membranes can all reach a specification; they do not all cost the same in water, power or methane slip. Pretreatment quality often decides which route can hold recovery in real operation.
Cascades · Dispensing · Injection
Compression & storage
Biomethane is compressed, stored and dispatched as CBG — by cascade, dispenser or, where permitted, network injection.
Once the gas meets a biomethane specification it still has to move. Cascade delivery to retail outlets, on-site dispensing, industrial pipe or — where the network allows — injection are different plants from a logistics point of view. Compression and storage follow the offtake, not the other way around.
Slurry · FOM · Soil return
Digestate
The residue is a second offtake problem, not a footnote. Nutrient quality and a buyer matter as much as gas.
What remains after digestion is wet, nutrient-bearing and regulated. It can be slurry, separated fibre, or a fermented organic manure if quality and a buyer exist. A CBG project that has no digestate plan has an unsolved waste problem sitting next to the compressor.
Project enquiry
Have a CBG project in mind?
Share feedstock, location and stage. We will discuss technology, feasibility and a practical project pathway.