Methodologies

applicability

AM0013（Avoided methane emissions from organic waste-water treatment ）

The methodology is applicable to methane avoidance project activities involving organic wastewater treatment plants with the following applicability conditions:

l  The existing waste water treatment system is an open lagoon system with an 'active' anaerobic condition, which is characterized as follows:

        -The depth of the open lagoon system is at least 1 m;

     -The temperature of the anaerobic lagoons is higher than 10°C. If monthly average temperature in a particular month is less than 10 oC, this month is not included in the estimations, as it is assumed that no anaerobic activity occurs below such temperature.

     -The residence time of the organic matter should be at least 30 days.

l  Sludge produced during project activity is not be stored onsite before land application to avoid any possible methane emissions from anaerobic degradation.

AM0022 （Avoided Wastewater and On-site Energy Use Emissions in the Industrial Sector）

This methodology is applicable to projects that introduce anaerobic treatment systems in existing industrial lagoon-based water treatment facilities under the following conditions:

l  Project is implemented in existing lagoon-based industrial waste water treatment facilities for wastewater with high organic loading;

l  The organic wastewater contains simple organic compounds (mono-saccharides). If the methodology is used for waste water containing materials not akin to simple sugars a CH₄ emissions factor different from 0.21 kgCH₄/kgCOD has to be estimated and applied;

l  The methodology is applicable only to the improvement of existing wastewater treatment facilities. It is not applicable for new facilities to be built or new build to extend current site capacity;

l  It can be shown that the baseline is the continuation of a current lagoon system for managing waste water. In particular, the current lagoon based system is in full compliance with existing rules and regulations;

l  The depth of the anaerobic lagoons should be at least 1m;

l  The temperature of the wastewater in the anaerobic lagoons is always at least 15 °C;

l  In the project, the biogas recovered from the anaerobic treatment system is flared and/or used on-site for heat and/or power generation, surplus biogas is flared;

l  Heat and electricity needs per unit input of the water treatment facility remain largely unchanged before and after the project;

l  Data requirements as laid out in the related Monitoring Methodology are fulfilled. In particular, organic materials flow into and out of the considered lagoon based treatment system and the contribution of different removal processes can be quantified (measured or estimated).

AM0039（Methane emissions reduction from organic waste water and bioorganic solid waste using co-composting）

The methodology is applicable under the following conditions:

l  Organic wastewater and bioorganic solid waste can be generated at separate locations;

l  The bioorganic solid waste can be of a single type or multiple types mixed in different proportions. The proportions and characteristics of different types of bioorganic waste processed in the project activity can be determined, in order to apply a multiphase landfill gas generation model to estimate the quantity of landfill gas that would have been generated in the absence of the project activity;

l  Project activities shall employ co-composting process for treatment of the organic wastewater and the bioorganic waste;

l  The anaerobic lagoons or storage tanks utilized for the treatment of the organic wastewater, which is processed in the project co-composting activity, in the baseline shall meet the following conditions:

- The monthly average ambient temperatures are greater than 10 ºC ;( the methodology is applicable even if some of the months during year have monthly average ambient temperature less than 10 ºC, but in such cases only months where monthly average ambient temperature are greater than 10 ºC shall be included in estimation of methane emissions)

- Depth of the wastewater anaerobic lagoon or storage tank is greater than 1 m;

- Residence time of the organic matter should be at least 30 days.

AMS.III.H

l  This project category comprises measures that recover methane from biogenic organic matter in wastewaters by means of one of the following options:

l  Substitution of aerobic wastewater or sludge treatment systems with anaerobic systems with methane recovery and combustion.

l  Introduction of anaerobic sludge treatment system with methane recovery and combustion to an existing wastewater treatment plant without sludge treatment.

l  Introduction of methane recovery and combustion to an existing sludge treatment system.

l  Introduction of methane recovery and combustion to an existing anaerobic wastewater treatment system such as anaerobic reactor, lagoon, septic tank or an on site industrial plant.

l  Introduction of anaerobic wastewater treatment with methane recovery and combustion, with or without anaerobic sludge treatment, to an untreated wastewater stream.

l  Introduction of a sequential stage of wastewater treatment with methane recovery and combustion, with or without sludge treatment, to an existing wastewater treatment system without methane recovery (e.g. introduction of treatment in an anaerobic reactor with methane recovery as a sequential treatment step for the wastewater that is presently being treated in an anaerobic lagoon without methane recovery).

l  Measures are limited to those that result in emission reductions of less than or equal to 60 kt CO₂ equivalent annually.