Biogas recovery and CHP production in modules 5 & 6 of Tehran South Wastewater Treatment Plant

Audit Analysis

A CDM biogas-recovery and CHP project at Tehran South WWTP with VVB-confirmed additionality via an investment test, but the validation report raised eight corrective action requests covering baseline justification, investment-analysis gaps, and emission-factor inconsistencies. Leakage is set at 0% on a 'negligible' basis that is contradicted by an appendix suggesting quantification, and several key monitoring and FNRB parameters are absent from the extracted record. The project is functional but carries moderate documentation and baseline-robustness concerns typical of early CDM AMS registrations.

Project Description

Red Flags

• ⚠Eight corrective action requests (CARs) were raised during validation, including missing baseline-scenario justification, incomplete investment-analysis sources, and inconsistencies in flaring-system location and grid-generation figures
• ⚠Leakage deduction is 0% justified as 'deemed negligible' in the validation report, yet an appendix dated 2017-01-12 describes the treatment as 'quantified' — an unresolved contradiction
• ⚠The PDD was submitted on an outdated form version (v5) and required updating to v8, indicating a documentation-quality gap at the time of validation
• ⚠No monitoring-period data, FNRB method, or usage-monitoring method is present in the extracted record, limiting the ability to verify ongoing performance

Credit Vintages

No issuances recorded on the registry.