Air and Noise Quality Management
Supporting the SDGs Goals
Goal 3:
Good Health and Well-being
Goal 7:
Affordable and Clean Energy
Goal 11:
Sustainable Cities and Communities
Goal 12:
Responsible Consumption and Production
Goal and Performance Highlights
Ratch Pathana Energy Power Plant
Goal
Reduce nitrogen oxide emissions by more than 280 metric tons from standard requirements, equivalent to 10%
Performance
Reduced by 419.38 metric tons, equivalent to
Goal
Reduce sulfur oxide emissions by more than 65 metric tons from standard requirements, equivalent to 10%
Performance
Reduced by 144.05 metric tons, equivalent to
Goal
Reduce total particulate matter by more than 95 metric tons from standard requirements, equivalent to 10%
Performance
Reduced by 98.06 metric tons, equivalent to
Sahacogen Green Power Plant
Goal
Reduce nitrogen oxide emissions by 54.3 metric tons, equivalent to 10% from standard requirements
Performance
Reduced nitrogen oxide emissions by 236.25 metric tons, equivalent to
Goal
Reduce sulfur oxide emissions by 22.7 metric tons, equivalent to 10% from standard requirements
Performance
Sulfur oxide emissions reduced by 221.11 metric tons, equivalent to
Goal
Reduce total particulate matter by 17.3 metric tons, equivalent to 10% from standard requirements
Performance
Total particulate matter reduced by 165.41 metric tons, equivalent to
Sahagreen Forest Power Plant
Goal
Reduce nitrogen oxide emissions by 21.4 metric tons, equivalent to 10% from standard requirements
Performance
Reduced nitrogen oxide emissions by 173.33 metric tons, equivalent to
Goal
Reduce sulfur oxide emissions by 9.0 metric tons, equivalent to 10% from standard requirements
Performance
Sulfur oxide emissions reduced by 88.12 metric tons, equivalent to
Goal
Reduce total particulate matter by 6.8 metric tons, equivalent to 10% from standard requirements
Performance
Total particulate matter reduced by 64.82 metric tons, equivalent to
Challenges and Opportunities
The operation of power plants inevitably involves the release of exhaust gases resulting from the combustion of various fuels. Recognizing the potential environmental impact, the Company places a high priority on the strict control and management of air quality—both within the plant premises and in surrounding areas that may be affected by power generation activities.
Emissions released from the power plants are rigorously monitored and managed to comply with applicable national and international environmental standards and regulations. This is to minimize any adverse effects on the environment and nearby communities. In addition, noise generated from the operation of power generation equipment can significantly affect workers, local residents, and surrounding ecosystems. The Company has therefore implemented targeted measures to mitigate these impacts and uphold its commitment to sustainable and responsible energy production.
Management Approach and Value Creation
Air Quality Management
The company strictly adheres to legal requirements for air quality management as follows:
Air Quality Management
- Air quality measurement equipment is installed at the stack venting point to monitor the levels of pollutants released into the air. These pollutants include total suspended particulates (TSP), sulfur dioxide (SOx as SO2), and nitrogen dioxide (NOx as NO2). The measured pollutant levels for all three types are within the limits set by legal standards.
- Air quality measurement equipment is also installed in the surrounding community areas around the plant. The company monitors air quality regularly and prepares environmental monitoring reports to be presented to the community and relevant authorities every 6 months. This is done to ensure continuous monitoring and control of air quality impacts, keeping them within the legal standards.
- The company has installed an electrostatic precipitator (ESP) system, which is highly effective in removing over 99.5% of particulate matter from exhaust gases at the Sako-Cogen Green Biomass Power Plant and the Sako-Green Forest Biomass Power Plant. This equipment helps prevent airborne dust pollution from being emitted from the power plants, ensuring that the air released from the stack meets the required air quality standards.
Air Quality Monitoring Results of Ratch Pathana and Affiliates Power Plants (2022–2024)
| Average Monitoring Results (Min-Max) | Legal Criteria | |||
|---|---|---|---|---|
| 2022 | 2023 | 2024 | ||
| Natural Gas Power Plant | ||||
| Ratch Pathana Energy Power Plant | ||||
| Total Suspended Particulates (TSP) (mg/m3) | 1.58-6.05 | 0.4-3.52 | 4.91-13.10 | ≤ 54 |
| Sulfur Dioxide (SOx as SO2) (ppm) | 0.13-0.87 | 0.07-1.3 | 0.18-0.83 | ≤ 18 |
| Nitrogen Dioxide (NOx as NO2) (ppm) | 18.75-97.74 | 30.5-70.99 | 17.32-65.7 | ≤ 108 |
| Fine Particulate Matter (PM 2.5) (ug/m3) | ||||
| Ban Nong Kham Community | - | - | 20.2-27.0 | ≤ 37.5 |
| Ban Huai Lek Community | - | - | 24.6-29.6 | ≤ 37.5 |
| Nisarat Kindergarten | - | - | 22.8-29.4 | ≤ 37.5 |
| Nong Phang Phuai Community | - | - | 17.6-31.3 | ≤ 37.5 |
| Biomass Power Plants | ||||
| Sahacogen Green Biomass Power Plant | ||||
| Total Suspended Particulates (TSP) (mg/m3) | 16.4-28.9 | 5.4-10 | 1.6-8.6 | ≤ 120 |
| Sulfur Dioxide (SOx as SO2) (ppm) | < 1.3 | < 1.4 | 3.7-4.3 | ≤ 60 |
| Nitrogen Dioxide (NOx as NO2) (ppm) | 122-143.8 | 65.8-77.1 | 209.4-216.4 | ≤ 200 |
| Fine Particulate Matter (PM 2.5) (ug/m3) | ||||
| Nong Pla Kho Temple | 9.6-19.6 | 114-36.0 | 14.9-33.0 | ≤ 37.5 |
| San Luang Temple | 9.5-19.7 | 0.046-0.140 | 16.5-33.2 | ≤ 37.5 |
| Sahagreen Forest Biomass Power Plant | ||||
| Total Suspended Particulates (TSP) (mg/m3) | 3.3-8.7 | 39.4-52.8 | 2.8-11.5 | ≤ 120 |
| Sulfur Dioxide (SOx as SO2) (ppm) | < 1.3 | < 1.4 | 1.6-3.8 | ≤ 60 |
| Nitrogen Dioxide (NOx as NO2) (ppm) | 60.6-60.9 | 4-72.4 | 45.1-102.7 | ≤ 200 |
| Fine Particulate Matter (PM 2.5) (ug/m3) | ||||
| Ban Huai Nam Sai School | 4.2-28.3 | 35-37.2 | 1.3-62.0* | ≤ 37.5 |
| Ban Khui Pom Sub-district Health Promotion Hospital | 4.6-23.1 | 34.3-37.3 | 3.6-55.0* | ≤ 37.5 |
Note:
* Although these measurements exceeded the standard threshold in certain periods, a comprehensive environmental assessment, which considered stack emission monitoring results in conjunction with meteorological data such as wind speed and direction, indicated that the dispersion pattern of pollutants did not impact the surrounding communities. Therefore, it can be reasonably concluded that the project activities did not adversely affect air quality in community areas. The measured values more likely reflect the general dispersion characteristics of pollutants in the overall area rather than direct impacts on the communities.
Noise Pollution Management
Equipment and machinery are designed, installed, and maintained
with appropriate inspection schedules to minimize noise generation. Tall, dense trees have been planted to serve as noise barriers and windbreaks, enabling noise levels to be controlled within legally mandated standards.
Three noise monitoring points have been established
at the noise source within the power plant, in the production control room, and along the power plant perimeter fence. Noise levels are maintained within legal standards, with workplace noise measurements conducted quarterly.
Hearing protection equipment (earmuffs)
is provided to employees who must work in areas where noise levels exceed 80 dBA. Personnel working in such areas are required to wear personal protective equipment to reduce noise exposure. Warning signs have been installed, and this requirement has been established as a mandatory regulation that all employees must strictly follow.
Noise Quality Monitoring Results for Ratch Pathana and Affiliates, 2022-2024
| Average Measurement Results (Min-Max) | Legal Criteria | |||
|---|---|---|---|---|
| 2022 | 2023 | 2024 | ||
| Ratch Pathana Energy Power Plant | ||||
| General Noise Level (Leq 24 hr) (dBA) | ||||
| Northern Project Fence Perimeter | - | - | 64.4-67.5 | 70 |
| Eastern Project Fence Perimeter | - | - | 60.1-63.5 | 70 |
| Southern Project Fence Perimeter | - | - | 64.9-67.4 | 70 |
| Western Project Fence Perimeter | 59.8-63.0 | 61.8-64.0 | 65.9-68.3 | 70 |
| Ban Rai Nueng Area | 56.2-58.5 | 63.4-64.0 | 58.7-68.3 | 70 |
| Workplace Noise Level - Personal Noise Dosimetry (Leq 12 hr) (dBA) | 63.2-80.3 | 78.1-79.9 | 73.1-77.6 | 83 |
| Sahacogen Green Biomass Power Plan | ||||
| General Noise Level (Leq 24 hr) | ||||
| Nong Pla Kho Temple Area | 46.6-60.7 | 46.6-60.7 | 48.9-60.4 | 70 |
| San Luang Temple Area | 45.8-63.3 | 45.8-63.3 | 46.8-52.6 | 70 |
| Project Fence Perimeter | 62.7-64.7 | 54.8-65.2 | 64.5-66.6 | 70 |
| Workplace Noise Level - Personal Noise Dosimetry (Leq 12 hr) | 79.3-80.4 | 81-82.1 | 76.1-78.6 | 83 |
| Sahagreen Forest Biomass Power Plant | ||||
| General Noise Level (Leq 24 hr) | ||||
| Ban Huai Nam Sai School | 48.7-55.8 | 47.6-56.7 | 48.5-67.3 | 70 |
| Si Chumphorn Wirawat Temple (Rai Dong Temple) | 50.4-51.8 | 65.0-67.5 | 47.8-65.5 | 70 |
| Project Fence Perimeter | 65.0-67.5 | 51.3-58.5 | 64.6-67.4 | 70 |
| Workplace Noise Level - Personal Noise Dosimetry (Leq 12 hr) | 77.7-81.9 | 78.6-80.3 | 79.6-82.0 | 83 |
Chemical Leakage Statistics (Volatile Organic Compounds: VOC)
During the past three years (2022-2024), there have been no incidents of Volatile Organic Compounds (VOC) leakage.
| Incident/Issue | Number of Occurrences (Times) | ||
|---|---|---|---|
| 2022 | 2023 | 2024 | |
| Chemical Leakage | 0 | 0 | 0 |
Stakeholders Directly Impacted
Customers
Business Partners
Employees
Community and Society
