Bangna Starch Wastewater Treatment and Biogas Utilization Project (300084)

Audit Analysis

A Gold Standard biogas-to-electricity project in Thailand with VVB-verified additionality and a measured baseline, but undermined by ten corrective actions, a 0% leakage deduction with no justification in the most recent verification, a grid emission factor from 2006, and a verified ERR figure roughly 79 times the pro-rata expectation for the elapsed monitoring period. The combination of measurement non-conformities, an unregistered new boiler, and an FPIC contradiction across documents raises material concerns about the reliability of the claimed emissions reductions.

Project Description

Red Flags

• ⚠Ten corrective actions and three compliance log items raised in the 2022 verification report, including measurement procedures not aligned with the registered monitoring plan and flare efficiency assumed as zero due to incomplete logging
• ⚠Verified ERR of 105,417 tCO2e for a two-month monitoring period versus a lifetime claimed estimate of 56,059 tCO2e over seven years — a pro-rata ratio of approximately 79×, indicating either an extremely conservative baseline or significant measurement uncertainty
• ⚠New boiler installed in May 2020 for biogas utilization was not included in the project boundary; post-registration change not completed until expected March 2025
• ⚠Leakage deduction of 0% with justification recorded as 'not addressed' in the 2022 verification report, superseding the earlier 'deemed negligible' statement from 2018
• ⚠Grid emission factor of 0.5637 tCO2/MWh is from 2006, more than 17 years before the monitoring period, raising questions about baseline currency

Credit Vintages