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Procurement Bidding Announcement for Biochar Projects by Macao International Carbon Emission Exchange
Release time：2026-08-25
Entrusted by the purchaser (buyer), Macao International Carbon Emission Exchange (MEX) is scheduled to hold an open bidding event for biochar-type projects on August 28, 2026. This event adopts the "lowest price wins" bidding rule, where sellers holding biochar carbon credit projects bid publicly, and the buyer selects the best procurement option based on the lowest valid bid. The specific plan is as follows:
I. Bidding Subject
The procurement requirements for this public bidding are as follows:
Procurement Element | Details |
Project Type | Biochar (Biomass) category, including carbon removal/reduction projects such as Biochar, Biochar Energy, Composting, and Organic Waste Treatment |
Registry | Mainstream international registries recognized by MEX, such as Verra, Gold Standard, Puro.earth, etc. |
Total Procurement Volume | 80 tonnes |
Starting Price (Price Cap) | HKD 1,000 / tonne |
Bidding Direction | Reverse bidding from high to low; the lowest price wins |
Partial Volume Bidding Allowed | Allowed. Bidders may declare a quantity lower than 80 tonnes, and the buyer will procure according to the actual valid declared quantity |
Project Location | No restriction |
Detailed Project Information | A link to the detailed project information on the official website of the registry must be provided upon registration for buyer review |
II. Bidding Time
August 28, 2026, 10:00–10:30 (Beijing Time)
III. Bidding Platform
Macao International Carbon Emission Exchange Trading System
https://trading.maceex.com/tradesite#/login
IV. Bidder Eligibility
Bidders must be institutional trading members of MEX. Bidders need to log in to the MEX trading system before 16:00 on August 27, 2026 (Beijing Time) to complete the registration application for this bidding, and submit the Project Information Registration Form for Biochar Bidding (see Annex) to MEX, ensuring that the biochar project intended for sale has completed issuance and registration with the registry.
V. Bid Declaration Volume
Bidders may submit multiple declarations, with the quantity for each declaration determined independently by the bidder. Partial volume declaration is permitted. The quantity and price of the latest declaration shall be deemed the valid declaration. The quantity of a single declaration must be a whole number in tonnes and shall not exceed the available biochar carbon credit balance under the bidder's name.
VI. Bidding Results
This bidding adopts the "lowest price wins" rule, with transactions executed based on the principles of price priority, quantity priority, and time priority. The specific execution conditions are as follows:
● After the bidding period ends, the trading system automatically ranks the valid declarations from lowest to highest based on the declared price. If declared prices are identical, they are ranked by quantity priority; if both declared prices and quantities are identical, they are ranked by submission time priority.
● When the total valid declared volume is greater than or equal to the total bidding volume, transactions are executed in sequence according to the price ranking from lowest to highest until the cumulative total bidding volume is reached; the execution price for each transaction is the declared price of that specific declaration.
● When the total valid declared volume is less than the total bidding volume, all valid declarations are executed, and the buyer procures based on the actual total declared volume; the execution price for each transaction is the declared price of that specific declaration.
VII. Bidding Process
● Account Opening and Registration Submission: Bidders log in to the MEX trading system to complete member and trading account registration and open trading permissions. Once becoming a member, the bidder logs in to the trading system to complete the registration for this bidding event, and simultaneously submits the project information form to participate in the bidding via email (please send the project information form to service@maceex.com).
● Performance Guarantee Deposit Payment: Bidders must transfer the performance guarantee deposit into the specified fund account of the trading system in advance, and complete the deposit freezing operation under "Bidding Market — Events I Joined" in the trading system. The deposit for this event is HKD 8,000 (Floor Price * Purchase Quantity * 10%). Bidders are requested to transfer the required bidding deposit into the trading system in advance. Domestic clients should transfer to MEX's Hengqin account in the amount of RMB 6,900. After the successful deposit transfer, please go to Trading System - Bidding Market - Event Management - Events I Joined to freeze the funds for this bidding event.
○ Clients may transfer the deposit directly to the MEX trading platform account with the following details:
■ Account Name: Macao International Carbon Emission Exchange Limited
■ Bank: Bank of China Macau Branch
■ Account No.: 183800000182730
■ Beneficiary Add: 1701, AIA Tower, 251A-301, Avenida Comercial de Macau, Macau
■ Bank Add: Avenida Doutor Mario Soares,Bank of China Building, Macau
■ Swift Code:BKCHMOMX
■ Address: Bank of China Building, No. 323 Avenida Doutor Mário Soares, Macao
● Online Bidding: Bidders log in to the MEX trading system during the bidding period to participate in bidding, submitting selling prices (not higher than the starting price) and quantities. The system prioritizes the lowest price in real time.
● Transaction Notice: After a successful project bid, MEX will send a transaction notice through the trading system, and publish a bidding result announcement on the MEX official website and trading system.
● Delivery and Settlement: The winning bidder shall transfer the corresponding carbon credits to the buyer's designated account within 5 trading days after receiving the transaction notice. The buyer will complete financial settlement after confirming that the carbon credits have been correctly received.
VIII. Bidding Service Fee
A service fee will be charged to the seller for this bidding event. The bidding service fee is 5% of the transaction funds, directly deducted from the transaction funds; any other fees that may arise from interbank or cross-border transfers shall be borne by the participants themselves.
IX. Default Handling
After the bidding ends, if the transaction cannot be completed on schedule due to unilateral reasons of the winning bidder (e.g., failure to transfer carbon credits on time, false declared information, etc.), MEX will not refund its performance guarantee deposit, will suspend its bidding trading eligibility, and will organize a separate bidding event upon the buyer's request.
X. Contact Information
Inquiry Phone: (+853) 28956009
Registration Email: service@maceex.com
Macao International Carbon Emission Exchange
August 25, 2026
Annex:MEX Biochar Project Bidding Information Registration Form
