Supply of a CO₂ purification and liquefaction system for the Oisu biogas plant

A bidder will be excluded for tax arrears or overdue social security contributions under the laws applicable in the bidder’s country of establishment. A bidder will also be excluded if awarding the contract would violate an international sanction. A bidder established outside Estonia must submit a certificate from the competent authority in its country of establishment confirming the absence of tax debts. The bidder must also provide a free-form confirmation that neither the bidder nor any member of its administrative, management or supervisory body is subject to an international sanction. Participation is open to bidders established in Estonia, an EU Member State, an EEA contracting state or a country that has joined the WTO Government Procurement Agreement; this must be evidenced by a commercial register extract, an authority certificate or another relevant document.

The bidder’s average annual net turnover for the last three completed financial years must be at least EUR 6,800,000. If the bidder has operated for a shorter period, the completed financial years available will be considered. Turnover must be submitted using Form No. 1. For a joint tender, the requirement is met if at least one joint tenderer satisfies it. During the 60 months preceding the tender deadline, the bidder must have successfully completed at least three contracts for CO₂ recovery and liquefaction plants. Each reference must concern a plant recovering CO₂ from biogas or from an off-gas stream generated by upgrading biogas to biomethane, with a net liquid CO₂ production capacity of at least 500 kg/h. At least one reference must concern the production of food-grade CO₂. A contract is considered completed when the plant has been commissioned and accepted by the customer or has entered commercial operation. References must be submitted using Form No. 2. The contracting authority may verify the information through public registers and may request additional explanations, data or documents within five working days for information that cannot be readily verified. The bidder must nominate a project manager with at least five years of relevant project management experience and experience as a project manager or equivalent on at least one CO₂ recovery or liquefaction plant project. The named key personnel must collectively cover CO₂ purification and liquefaction process design; feed-gas qualification and food-grade CO₂ product quality; PED, ATEX, conformity assessment and electrical safety; and PLC/SCADA integration. One person may cover several areas if they have the required competence and sufficient capacity. The information must be submitted using Form No. 3. The tender must include the completed price schedule and payment schedule and completed Annex No. 3 on guaranteed performance and contractual penalties. A technical proposal must also be submitted, containing at least the process concept, a preliminary mass and energy balance, a process flow diagram, a main equipment list, a preliminary layout, the principal technical and physical interfaces, and the proposed feed-gas treatment concept. For each material technical requirement, the proposal must identify the offered solution, value or method and refer to the relevant section or supporting document. For a joint tender, the bidders must appoint an authorized representative and submit a valid power of attorney. The bidder must confirm compliance with the tender documents and, where applicable, explain equivalence and provide supporting evidence.