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

A bidder will be excluded for tax arrears or overdue social security contributions under the legislation of the bidder’s country of establishment. A contract will not be awarded where doing so would violate an international sanction; the bidder must provide a free-form confirmation that neither the bidder nor a member of its administrative, management or supervisory body is subject to such a 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. A bidder established outside Estonia must submit a tax clearance certificate and an extract from the commercial register, an official certificate or another relevant document proving its country of establishment.

The bidder’s average annual net turnover during the last three completed financial years must be at least EUR 6,800,000. If the bidder has operated for a shorter period, the available completed financial years will be taken into account. Turnover must be reported using Form No. 1; for a joint tender, it is sufficient for at least one joint tenderer to meet the requirement. 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 when upgrading biogas to biomethane, with a net liquid CO₂ production capacity of at least 500 kg per hour. At least one reference must concern the production of food-grade CO₂. The plant must have been commissioned and accepted by the customer or 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 or evidence within five working days. The bidder must nominate a project manager with at least five years of relevant project-management experience and experience as project manager or in an equivalent role on at least one CO₂ recovery or liquefaction plant project. The 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 a completed price and payment schedule (Annex No. 4), a technical proposal, and the completed guaranteed performance and contractual penalties annex (Annex No. 3). The technical proposal must include 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. It must also contain a concise requirement-by-requirement compliance statement identifying the offered solution, value or method and referring to the relevant tender section or supporting document. Joint tenderers must appoint an authorised 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.