Technology & Process
Secure the molecule before designing the plant.
Feedstock is the commercial foundation. Plant capacity and guarantees are frozen only after the recoverable feed envelope is understood.
Feedstock Strategy
Matching technology to the feed, not the other way around.
High-Solids / Crop Residues
Dry digestion / Plug Flow + robust pretreatment
Wet / Slurry Feeds
CSTR / multi-stage wet digestion + stable feed conditioning
Variable Mixed Feeds
Feed-specific hybrid architecture + blend control
Rule: first define the contractual feed envelope; then define the guaranteed plant output.
Availability
Source mapping, seasonality, competing use and contractual control.
Quality
TS, VS, moisture, ash, C:N, sulphur, contaminants and BMP.
Logistics
Collection radius, bale / slurry handling, storage loss and delivered cost.
Guarantee Basis
Blend window, exclusions, feed quantity and quality envelope for PGTR.
Multi-feed does not mean one digester fits every feed.
Map Sources
Annual availability, seasonality and competing use
Test Quality
TS / VS, moisture, ash, BMP and contaminants
Model Logistics
Collection radius, storage loss and delivered cost
Freeze Blends
Operating windows, exclusions and recipes
Guarantee Output
CBG, recovery, utilities and availability against feed envelope
The hidden risk: theoretical biomass is not bankable feedstock. Practical recovery, logistics and competing uses determine whether a plant can perform every day.
1000-Acre Screening · Top Five Indicative CBG Outputs
| Crop / Scenario | Usable Feed (TPD) | CBG (TPD) |
|---|---|---|
| Hybrid Napier | 365.19 | 6.395 |
| Sugarcane incl. mill residues | 27.56 | 2.594 |
| Oil Palm | 11.80 | 0.906 |
| Coffee Pruning | 11.31 | 0.838 |
| Tapioca / Cassava | 11.23 | 0.604 |
Indicative screening only — detailed project sizing requires local yield, recoverable fraction, delivered-cost, storage, BMP and competing-use validation.
Land & Feedstock Productivity
1000-acre benchmark. Screen first. Size later.
Land Productivity
Napier dominates on a whole-green-biomass basis.
Integrated Residues
Sugarcane becomes stronger where mill residues are genuinely available.
Dry Residues
Collection, pretreatment and competing use often matter more than theoretical methane potential.
Project Discipline
Use district / farm data before DPR or performance guarantees.
Pretreatment & Digestion
Prepare the feed. Protect the biology.
Receive & Qualify
Weigh, sample, inspect and reject outside the feed envelope.
Prepare
Size reduction, contaminant removal, homogenisation and blend control.
Stabilise Biology
Feed ramp, HRT / OLR, mixing, temperature, pH and VFA control.
Design for Upset
Redundancy, bypass, buffer volume and safe recovery strategy.
Why it matters: poor upstream preparation becomes downstream foaming, scum, unstable OLR, equipment wear, lower methane yield and unplanned downtime.
Pretreatment & Feed Preparation
Uniform particle size, contaminant removal, slurry consistency, temperature and maintainability.
Digester Design
HRT, OLR, temperature, mixing, pH / alkalinity, inhibition control and biological buffer.
Gas Upgrading, Reliability & Digital
Recover the molecule. Protect uptime.
PSA / VPSA
High-purity separation with recovery and cycle optimisation.
Membrane
Compact modular upgrading with staged recovery and slip control.
Water Scrubbing
Robust absorption route where water and utilities support the case.
H₂S + Drying
Protect downstream upgrading, analyser and compression systems.
Compression
Final pressure, cooling, custody metering and delivery integration.
Digital Controls
PLC / SCADA, historian, alarms, event logs, dashboards and remote diagnostics.
In-House Technology Base: selected CBG purification / upgrading systems can be supported through in-house manufacturing capability.
Gas Upgrading
H₂S and moisture conditioning, methane recovery, low slip, power and product quality.
Mechanical Reliability
Maintainability, critical redundancy, condition monitoring and lifecycle asset performance.
Circularity & Performance Assurance
Close the loop. Contract the outcome.
Mechanical completion is not plant success. Acceptance demonstrates stable biology, saleable CBG, agreed recovery, product quality, utility consumption and availability through a transparent PGTR methodology.
Clean Gas Stream
Circular Stream
Saleable CBG
kg/day at agreed feed envelope
Product Quality
CH₄ and contaminant limits
Methane Recovery
Recovery % and slip limit
Specific Power
kWh/kg or Nm³ CBG
Plant Availability
Sustained uptime commitment
Digestate
Compliant, manageable output
Digestate Management
Mass balance, dewatering, FOM / LFOM compliance, logistics and realistic revenue.
EPC Performance Guarantee
Guarantees tied to defined feedstock, measured output, recovery, utilities and sustained availability.
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