Halilbeyli Biogas Plant

Audit Analysis

The Halilbeyli Biogas Plant is a Gold Standard biogas-to-electricity project in Turkey with a VVB-verified combined additionality test and no reported reversal events, but it carries notable gaps: no buffer pool is documented, FPIC was not conducted, the baseline is project-specific and modeled, and seven material findings triggered five corrective actions. The project delivered roughly 110% of its pro-rata ex-ante expectation for the 2024 monitoring period, which is reassuring, yet several key parameters (FNRB, usage rates, CORSIA/CCP status) remain unstated in the available record.

Project Description

Red Flags

• ⚠Free, Prior and Informed Consent (FPIC) was not conducted, despite the project involving local communities and manure/waste feedstock.
• ⚠Seven material findings were raised in the verification report, including the fourth gas engine not yet being commissioned, outdated TEIAS emission-factor links, and initially missing stakeholder consultation and grievance-mechanism evidence.
• ⚠The crediting period is stated differently in the verification report (2020-10-25 to 2025-10-24) versus the monitoring report (2022-05-09 to 2024-04-30), creating ambiguity about the true project duration and the basis for pro-rata calculations.

Credit Vintages