The options, and how they were narrowed

The option set was generated rather than inherited. An isolated agent worked outward from Salerno's capabilities and from the physical inputs, without sight of the client's own framing, and produced 122 candidates covering 112 distinct positions, listed in full in the working papers. Fifteen were carried into this case. The choice reduces to four questions.

What form the product takes. Compressed biomethane can enter a pipeline or move by tube trailer. Liquefied biomethane can move by ship, by tank container or by road, and reaches the bunker market, but costs about $4.00/MMBtu to make.

Which route it takes. Pipeline through the Malaysian transmission system; ship from Songkhla, which has regular feeder services to Singapore and Tanjung Pelepas (UNIS); tank container on those same feeder services, which needs no jetty; road through Sadao or Padang Besar to Johor; or tolling liquefaction in Malaysia and shipping from there.

What configuration produces it. Upgrading at each mill and trucking compressed gas to a hub, which is what both operating regional precedents do, or trucking raw biogas to a central upgrading plant, which is what the client's concept describes and which moves roughly twice the volume for the same energy.

Where Salerno stands. Owning the chain from mill gate to Singapore meter; acting as agent for the mills for a fee per unit; owning only the logistics fleet and charging for custody; or building and operating the plant for others.

Rejected, with the reason: building a biomethane-fired power station in Thailand, which is the most capability-native option available and converts a molecule carrying an export premium into electricity at about 4.55 THB/kWh; compressed gas as a vehicle fuel, against a declining Thai natural-gas vehicle fleet; buying equity in the mills, which buys a cyclical crop business to secure a waste stream a contract secures for nothing; a dedicated pipeline to the coast, whose capital and right-of-way are out of proportion to corridor volumes; and reforming the gas to hydrogen, ammonia or methanol, each of which destroys value against the delivered gas price at every price found.

Three constraints were tested rather than assumed, and two of them cost something.

Selling the environmental attribute into Europe or Japan may be worth more per unit than physical delivery to Singapore and carries no shipping, which makes the Singapore-only constraint expensive. This memo does not price it, because the brief puts other destinations out of scope.

Co-digesting empty fruit bunch would raise gas yield per mill, which is the variable this case is most sensitive to, and the POME-only constraint forecloses it.

The third, that production must sit in the Surat Thani to Songkhla corridor, was tested by pricing liquefaction tolling in Malaysia and costs nothing: that option is the most expensive of the five routes, so the constraint forecloses nothing the case would have wanted.

Four candidates from that list are carried and not evaluated here, and a reader should know which. Bio-LNG into the Singapore bunker market is treated below. Buying a methane-avoidance credit stream under the Thailand-Singapore Article 6.2 agreement is treated below. Combining Thai, Malaysian and Indonesian supply into one delivered offer is the position this memo identifies as the winning one and then declines to evaluate, because it breaches both the feedstock and the corridor constraints; it is the strongest reason to ask whether those constraints should hold. And Kestrel already holds a truck-based Malaysia-to-Singapore bio-LNG supply contract, which the brief records and this memo does not use: it is the only proven channel to a Singapore buyer anywhere in the case, and whether Thai molecules can ride it is a question worth a phone call before it is worth a study.

Three more were never generated, and two of them could move the answer.

The brief describes Kestrel as a technology-neutral system integrator, and this analysis models pressure-swing adsorption at both ends of a nineteen-point capital range without asking whether it is the right technology. Membrane separation competes directly in the 500 to 2,000 Nm3/h duty band a cluster needs, and the upgrading capital is the single largest uncertainty in the case. A technology comparison belongs in the same three-quotation exercise as the vendor pricing, and it costs nothing extra to ask for both.

Book-and-claim or mass-balance delivery would dissolve the two risks the verdict turns on at once. If the attribute can travel on paper while the molecule goes to the nearest buyer, the cross-border injection precedent stops being a gating condition and the route cost stops being a cost. Gas Malaysia's Kluang station is certified under a scheme built on mass balance, so the machinery exists in the region. Whether Singapore's pilot accepts it is the question, and it is the same phone call as the offtake term sheet.

Project debt is the third. Every return in this memo is unlevered, because that is what the brief's hurdle asks for and what the client's own broken financing block leaves. But the Salerno-level criterion is missed by 47%, and one of the project's own intended shareholders is a joint venture with a large Thai bank. Debt does not improve the project, and it does change what a 27.5% equity stake is worth. It is not modeled here and it should be, at the point the structure is settled.

A fifth was never generated at all, and it should have been. About 40% of Southern mills have no digester, which is what caps the resource well before the 70-mill count does: the 200 tonne-per-day target needs 32 mills against 42 that already capture their gas. Building, owning and operating digesters at the mills that lack one is the option that lifts that cap, and it is the one the Article 6.2 route above could part-fund. It is absent from the candidate list and from the alternatives above, and it is the gap in the option set most likely to matter, because every other option here competes for a fixed pool of gas while this one enlarges it.