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AMS-III.I — Avoidance of methane production in wastewater treatment through replacement of anaerobic systems by aerobic systems

About this methodology

Projects replace anaerobic wastewater treatment with aerobic biological treatment. The method measures methane emissions avoided through the change in treatment conditions.

Issued by
CDM (UNFCCC) · issuer's site
Version
8.0 · source ·
Status
Active at CDM / UNFCCC · source ·
Climate outcome
Emission reductions
Activity
Wastewater
Official page
cdm.unfccc.int ·
Also used by projects of

How methodology v3 reads projects of this type

What CarbonMeld reads

  • shown

    Grid emission factor: the methodology sets rules for it in some cases. CarbonMeld reads it in the project's documents. CM-F-AMS-III-I-GRID-EF

    Link

  • A confirmed investment analysis A-INVEST

    The documents show a project-level additionality test, the validation confirmed it, and it is an investment analysis (a numeric test of the project's finances with and without carbon revenue).

Figures set against the methodology's own values

  • Integrity comparison

    The small-scale limit is 60 kt CO2e per year (p. 1). CarbonMeld compares the project's annual estimate with it. CM-F-AMS-III-I-SMALL-SCALE-LIMIT

    small-scale limit: 60 kt CO2e per year

    Link

Deductions that can apply

  • A methane activity the law requires A-LEGAL

    The rule applies to projects that capture or avoid methane. These are landfill gas, manure, wastewater, composting and coal-mine methane. They also include orphan wells, oil and gas leaks, rice, enteric methane and household biogas. The documents state that the law requires the activity. Or the documents state that a law requires the capture of the gas. An activity that the law already requires is not additional. If the documents show that the baseline already deducts the amount that the law requires, CarbonMeld takes no point.

Set by the methodology or the programme, not assessed by our current method

  • not assessed

    Leakage: the methodology sets rules for it in some cases (AMS-III.I v08 Leakage para 19, p. 9). Our current method does not assess it. CM-F-AMS-III-I-LEAKAGE

    Link
  • not assessed

    Social safeguards and consent of communities (FPIC): any such rules come from the programme, not the methodology. Our current method does not assess it. CM-F-AMS-III-I-SAFEGUARDS-FPIC

    Link

Not applicable to this type — never a gap in our current method

The criterion does not apply to this methodology. Our current method never counts it as a gap.

The general rules apply as well. Read the general rules.

The rules of methodology v2.2, as they were: the archived v2.2 page.

History and transitions

All 8 versions

  • v08adopted 17 Jul 2009source

    To include additional guidance on the determination of baseline methane generation potential based on Biochemical Oxygen Demand (BOD5,20) with a view to maintain consistency between AMS-III.I and AMS-III.H. Additional guidelines on …

  • v07adopted 26 Sept 2008source

    Include additional guidance on baseline determination and project emission calculations; The methodology restructured, provisions related to methane correction factor and related uncertainties have been revised.

  • v06adopted 27 Jul 2007source

    Additional leakage guidance to allow for application under a programme of activities (PoA).

  • v05adopted 4 May 2007source

    Clarifies how the number of months with average lagoon temperature above 15°C in AMS III.I is to be determined. Scope 15 excluded.

  • v04adopted 15 Dec 2006source

    Revised AMS III.I, analogous to AMS III.H, based on 2006 IPCC Guidelines for National Greenhouse Gas Inventories. Expand applicability to activities in geographic locations where lagoon temperature is above 15°C for only a part of the year.

  • v03adopted 21 Jul 2006source

    Clarify the applicability condition relating to residence time of wastewater being treated.

  • v02adopted 10 May 2006source

    Report The Board at its twenty-fourth meeting noted that type III project activities might be able to achieve significant emission reductions, without exceeding the direct emissions limits i.e.,15 kilo tonnes CO2e applicable at the time. …

  • v01adopted 24 Feb 2006source

    Initial adoption.

Projects using AMS-III.I

Browse 14 published projects using AMS-III.I, listed alphabetically. There is no ranking for this methodology yet: it appears here automatically once 5 of its projects not in the pipeline or under validation are rated. Open a project to view its registry details and the analysis available for that project.

Which registries list projects under AMS-III.I?

In CarbonMeld's data, AMS-III.I projects are on 2 registries: CDM (10) and Verra (4). Being listed on a registry is not the same as being registered: the «Registered» column counts the projects each registry shows as registered, and credits are issued only after each verification.

RegistryProjectsRegisteredProjects list
CDM (UNFCCC)106See the list
Verra (VCS)40See the list

Counts of project records in CarbonMeld's data, with or without a CarbonMeld analysis. «Registered» counts the records whose current registry status is «registered», as last read (15 November 2026); projects in a later status, such as awaiting verification approval, late to verify or completed, are not in that column.

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