Feedstock is where bankability is won.

Every anaerobic digestion plant stands on what actually arrives at the gate. Redrock designs the feedstock basket, proves its yield, and contracts it into committed, bankable supply, with the contamination, categorisation and traceability discipline that keeps a plant compliant and a project financeable.

What we do

From basket to committed supply.

Basket design

Blending source-segregated food waste, commercial and industrial organics, agricultural residues and by-products into a stable, high-yield basket that accounts for seasonality, competition and contamination.

BMP & characterisation

Biochemical methane potential testing to VDI 4630 at a sound inoculum-to-substrate ratio, turning a feedstock claim into a design yield taken at P90, not the headline number.

Gate-fee & offtake contracts

Long-form supply agreements, gate fees, minimum and maximum volumes, contamination deductions, acceptance criteria and force majeure, structured to hold up over the plant’s life.

ABP & compliance

Animal by-product categorisation and the rules that follow, plus the resource-recovery and quality frameworks that let digestate leave the waste regime as a product.

Traceability

Chain-of-custody and mass-balance traceability from gate to product, the evidence base for both regulatory compliance and certificate or carbon claims.

Committed-basket lock

Converting letters of intent into contracted, committed tonnage before FID, because a lender underwrites signed feedstock, not a pipeline.

The design yield

P90, not the headline number.

Optimistic yield assumptions are the most common way a bioenergy business case fails quietly. We run biochemical methane potential testing to VDI 4630, at an inoculum-to-substrate ratio that gives a defensible result, and design to the P90 figure rather than the mean. The plant is then sized against what the biology will reliably deliver, not its best day.

That single discipline, a proven design yield tied to real characterisation data, is what connects the feedstock basket to a financial model a lender will accept.

VDI 4630 (BMP) Inoculum-to-substrate ratio P90 design yield Reg 1069/2009 (ABP) Category 1, 2 & 3 ABP Resource recovery / quality protocols Chain-of-custody traceability

Building or defending a feedstock basket?

From basket design and BMP to gate-fee contracting, let's talk about securing your supply.

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