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CDM Methodology: A CDM methodology is a procedure for baseline scenario identification, determination of additionality, calculation of emission reductions and monitoring of the relevant parameters. The correct use of an approved CDM methodology must be validated by designated operational entities (DOEs), which are accredited by the Executive Board, before they can submit the request for registration of the CDM project to the Executive Board. DOEs must also verify and certify emission reductions from CDM project activities, before they can request their issuance by the Executive Board. Classification of CDM methodologies This section gives an overview of different types of CDM methodologies according to the criteria; sectoral scope, greenhouse gases and type of greenhouse gas abatement activity. The section is intended to provide assistance in navigating the basic concepts and tools of approved CDM methodologies. For more information on all approved methodologies please go to the following url: http://cdm.unfccc.int/methodologies/PAmethodologies/approved.html Sectoral scope: This criterion is used by the CDM Executive Board to categorize methodologies. The predefined categories are:
(i) energy industries (renewable-/non-renewable sources),
(ii) energy distribution,
(iii) energy demand,
(iv) manufacturing industries,
(v) chemical industries,
(vi) construction,
(vii) transport,
(viii) mining/mineral production,
(ix) metal production,
(x) fugitive emissions from fuels (solid, oil and gas),
(xi) fugitive emissions from production and consumption of halocarbons and sulphur hexafluoride,
(xii) solvent use,
(xiii) waste handling and disposal,
(xiv) afforestation and reforestation; and
(xv) agriculture. 
Of the 201 methodologies submitted 79 have been approved, 93 rejected, and 29 are being assessed.
In average it has taken 301 days for a methodology to be approved from the deadline of submission. (A round is the methodologies treated at a meeting of the Methodology Panel) Type of greenhouse gas abatement activity: In the following overview approved CDM methodologies are classified according to the nature of the greenhouse gas abatement activities of CDM projects. The following categories are used (note: they are not part of the official UNFCCC CDM terminology): power generation/saving (section 3.2), end-of-pipe activities (section 3.3), energy efficiency (section 3.4), fuel switch (section 3.5), reduction of process related emissions (section 3.6), reductions of fugitive emissions through repair and maintenance measures (section 3.7) and sequestration through afforestation/reforestation (section 3.9).
| Methodology
Mumber |
Sectors
covered |
Number
of projects |
|
| Zero emission renewables | | ACM2 (ver 6) | Grid-connected electricity generation for renewable sources (no biomass) | 400 | | | AM26 (ver 2) | Zero-emissions grid-connected electricity generation from renewable sources in Chile or in countries with merit order based dispatch grid | 0 | | | AM5 | Small grid-connected zero-emission renewable electricity generation | 6 | Replaced by ACM2 3. March 2006 | | AM19 (ver 2) | Ren. Energy project replacing the electricity of one single fossil plant (excl. biomass) | 0 | | | AM3 (ver 4) | Simplified financial analysis for landfill gas capture projects (no CERs from electricity) (ex-ante correction) | 5 | WASTE (not Animal Waste) | | AR-AM7 | Afforestation and Reforestation of Land Currently Under Agricultural or Pastoral Use
| 0 | Afforestation & Reforestation |
| | Biomass:(not applicable for non-renewable biomass, EB21) | | AM15 | Bagasse-based cogeneration connected to an electricity grid | 30 | Replaced by ACM6 28/11 2005 | | AM7 | Switch from coal/lignite to seasonal agro-biomass power | 0 | | | AM4 (ver 2) | Grid-connected biomass power generation that avoids uncontrolled burning of biomass | 2 | Replaced by ACM6 28/11 2005 | | ACM6 (ver 4) | Grid-connected electricity from biomass residues (includes AM4 & AM15) | 113 | | | AM27 (ver 2) | Substitution of CO2 from fossil or mineral origin by CO2 from renewable resources in production of inorganic compounds | 1 | | | AM36 | Fuel switch from fossil fuels to biomass residues in boilers for heat generation | 5 | | | AM42 | Grid-connected electricity generation using biomass from newly developed dedicated plantations | 0 | |
| | Animal waste | | ACM1 (ver 5) | Landfill gas project activities | 95 | WASTE (not Animal Waste) | | AM2 (ver 3) | Landfill gas capture & flaring with public concession contract (ex-post baseline correction) | 1 | WASTE(not Animal Waste) | | AM10 | Landfill gas electricity (CERs from electricity) | 2 | WASTE(not Animal Waste) | | AM11 (ver 3) | Landfill gas recovery with electricity generation (no CERs from electricity) | 7 | WASTE(not Animal Waste) | | AM12 | Biodigester power from municipal waste (only India) | 1 | WASTE (not Animal Waste)
Included in AM25 at EB26 | | AM22 (ver 4) | Avoided wastewater and on-site energy use emissions in the industrial sector | 11 | WASTE (not Animal Waste) | | AM25 (ver 5) | Avoided emissions from organic waste through composting | 12 | WASTE(not Animal Waste) | | AM39 | Methane emissions reduction from organic waste water and bioorganic solid waste using co-composting | 0 | WASTE (not Animal Waste) | | AM6 | GHG emission reduction from manure management systems (on hold) | 14 | Replaced by ACM10 at EB26 | | AM13 (ver 4) | Biogas power from open anaerobic lagoon waste water treatment systems | 9 | | | ACM10 (ver 2) | GHG emission reductions from manure management systems | 4 | | | AM16 (ver 3) | Change of animal waste management systems (on hold) | 40 | Replaced by ACM10 at EB26 |
| | Fossil fuel switch | | AM8 | Fuel switch from coal/oil to natural gas | 14 | Replaced by ACM9 at EB24 | | ACM9 (ver 3) | Industrial fuel switching from coal or petroleum fuels to natural gas | 11 | | | AM29 | Grid connected electricity generation plants using natural gas | 20 | | | AM9 (ver 2) | Recovering associated gas in stead of flaring | 14 | Fugitive emission from fuels | | AM37 | Flare reduction and gas utilization at oil and gas processing facilities | 3 | Fugitive emission from fuels | | ACM8 (ver 3) | Coal bed methane and coal mine methane capture and use for power (electrical or motive) and heat/or destruction by flaring | 28 | Fuel switch from coal/oil to natural gas | | AM41 | Mitigation of Methane Emissions in the Wood Carbonization Activity for Charcoal Production | 1 | |
| | Energy distribution | | AM23 | Leak reduction from natural gas pipeline compressor or gate stations | 0 | | | AM43 | Leak reduction from a natural gas distribution grid by replacing old cast iron pipes with polyethylene pipes | 0 | | | AM45 | Grid connection of isolated electricity systems | 1 | | | AM1 (ver 5) | Incineration of HFC23 waste streams from HCFC22 production | 18 | HFCs, PFCs & SF6 | | AM30 | PFC emission reduction from anode effect mitigation at primary aluminium smelting facilities | 1 | HFCs, PFCs & SF6 | | AM35 | SF6 Emission Reductions in Electrical Grids | 0 | HFCs, PFCs & SF6 | | ACM5 (ver 3) | Increasing the blend in cement production | 31 | Cement | | AM33 | Use of non-carbonated calcium sources in the raw mix for cement processing | 1 | Cement | | AM40 | Use of alternative raw materials that contain carbonates in clinker manufacturing in cement kilns | 0 | Cement |
| | N2O | | AM28 (ver 4) | Catalytic N2O destruction in the tail gas of nitric acid or caprolactam production plants | 10 | | | AM34 (ver2) | Catalytic reduction of N2O inside the ammonia burner of nitric acid plants | 16 | Old versions must resubmit if not req. <8d | | AM21 | Decomposition of N2O from existing adipic acid production plants | 4 | Old versions must resubmit if not req. <8d |
| | Energy efficiency, Supply side | | ACM7 | Conversion from single cycle to combined cycle power generation | 4 | | | AM14 (ver 2) | Natural gas-based package cogenereation | 40 | | | AM17 (ver 2) | Steam system efficiency improvement by replacing steam traps and returning condensate | 0 | Energy efficiency, Industry | | AM18 | Baseline methodology for steam optimization systems | 13 | Energy efficiency, Industry | | ACM3 (ver 4) | Emission reduction through partial substitution of fossil fuels with alternative fuels in cement manufacture | 10 | Energy efficiency, Industry | | ACM4 (ver 2) | Waste gas and/or heat for power generation | 123 | Energy efficiency, Industry.
Old versions must resubmit if not req. <8d | | AM32 | Waste gas or waste heat based cogeneration system | 1 | Energy efficiency, Industry | | AM24 | Waste gas recovery and utilization for power generation at cement plant | 3 | Energy efficiency, Industry | | AM38 | Improved electrical energy efficiency of an existing submerged electric arc
furnace used for the production of SiMn
| 1 | Energy efficiency, Industry | | AM44 | Energy efficiency improvement projects: boiler rehabilitation or replacement in industrial and district heating sectors | 0 | Energy efficiency, Industry |
| | Energy efficiency, Service | | AM20 | Water pumping efficiency improvement | 0 | |
| | Transport | | AM31 | Baseline Methodology for Bus Rapid Transit Project | 1 | | | AR-AM1 (ver 2) | Reforestation of degraded land | 3 | Afforestation & Reforestation | | AR-AM2 | Restoration of degraded lands through afforestation/reforestation | 1 | Afforestation & Reforestation | | AR-AM3 (ver 2) | Afforestation and reforestation of degraded land through tree planting, assisted natural regeneration and control of animal grazing | 0 | Afforestation & Reforestation | | AR-AM4 | Reforestation or afforestation of land currently under agricultural use | 0 | Afforestation & Reforestation | | AR-AM5 | Afforestation and reforestation project activities implemented for industrial and/or commercial uses | 0 | Afforestation & Reforestation | | AR-AM6 | Afforestation/Reforestation with Trees Supported by Shrubs on Degraded Land
| 0 | Afforestation & Reforestation |
| |
| Small-scale
CDM project activity categories |
Number
of projects |
| Type I:Renewable energy projects < 15 MW | | 1. A.Electricity generation by the user | 14 | | 2. B Mechanical energy for the user | 4 | | 3. C. Thermal energy for the user | 86 | | 4. D. Renewable electricity generation for a grid | 558 |
| | Type II:Energy efficiency improvement projects < 60 GWh savings | | 1. A. Supply side energy efficiency improvements - transmission and distribution | 0 | | 2. B. Supply side energy efficiency improvements - generation | 13 | | 3. C. Demand-side energy efficiency programmes for specific technologies | 9 | | 4. D. Energy efficiency and fuel switching measures for industrial facilities | 68 | | 5. E. Energy efficiency and fuel switching measures for buildings | 15 | | 6. F. Energy efficiency and fuel switching measures for agricultural facilities and activities | 1 |
| | Type III:EB27: < 60 ktCO2 reduction | | 1. Agriculture (no methodologies available) | 0 | | 2. B. Switching fossil fuels | 24 | | 3. C. Emission reductions by low-greenhouse emission vehicles | 3 | | 4. D. Methane recovery | 168 | | 5. E. Avoidance of methane production from biomass decay through controlled combustion | 47 | | 6. F. Avoidance of methane production from biomass decay through composting | 9 | | 7. G. Landfill methane recovery | 1 | | 8. H. Methane recovery in wastewater treatment | 20 | | 9. I. Avoidance of methane production in wastewater treatment through replacement of anaerobic lagoons by aerobic systems | 1 | | 10. J. Avoidance of fossil fuel combustion for carbon dioxide production to be used as raw material for industrial processes | 0 | | 11. K. Avoidance of methane release from charcoal production by shifting from pit method to mechanized charcoaling process | 1 |
| |
| Approved
method |
Number
of projects (overall) |
| AM3 | 5 | | AM4 | 2 | | AM5 | 6 | | AM6 | 14 | | AM8 | 14 | | AM9 | 14 | | AM10 | 2 | | AM11 | 7 | | AM12 | 1 | | AM13 | 9 | | AM14 | 4 | | AM15 | 30 | | AM16 | 40 | | AM17 | 0 | | AM18 | 13 | | AM19 | 0 | | AM20 | 0 | | AM21 | 4 | | AM22 | 11 | | AM23 | 0 | | AM24 | 3 | | AM25 | 12 | | AM26 | 0 | | AM27 | 1 | | AM28 | 10 | | AM29 | 20 | | AM30 | 1 | | AM31 | 1 | | AM32 | 1 | | AM33 | 1 | | AM34 | 16 | | AM35 | 0 | | AM36 | 5 | | AM37 | 3 | | AM38 | 1 | | AM39 | 0 | | AM40 | 0 | | AM41 | 1 | | AM42 | 0 | | AM43 | 0 | | AM44 | 0 | | AM45 | 1 | | ACM1 | 95 | | ACM2 | 400 | | ACM3 | 10 | | ACM4 | 123 | | ACM5 | 31 | | ACM6 | 122 | | ACM7 | 4 | | ACM8 | 28 | | ACM9 | 11 | | ACM10 | 4 | | AR-AM1 | 3 | | AR-AM2 | 1 | | AR-AM3 | 0 | | AR-AM4 | 1 | | AR-AM5 | 0 | | AR-AMS1 | 2 | | AMS-I.A. | 14 | | AMS-I.B. | 4 | | AMS-I.C. | 86 | | AMS-I.D. | 558 | | AMS-II.A. | 0 | | AMS-II.B. | 13 | | AMS-II.C. | 9 | | AMS-II.D. | 68 | | AMS-II.E. | 15 | | AMS-II.F. | 1 | | AMS-III.A. | 0 | | AMS-III.B. | 24 | | AMS-III.C. | 3 | | AMS-III.D. | 168 | | AMS-III.E. | 47 | | AMS-III.F. | 9 | | AMS-III.G. | 1 | | AMS-III.H. | 20 | | AMS-III.I. | 3 | | AMS-III.J. | 0 | | AMS-III.K. | 1 | | AM1 | 18 | | AM2 | 1 | | AM46 | 0 | | AM47 | 0 | | AM48 | 0 | |
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