Sustainability Projects
Water Management 2022
“Water” is one of the essential resources required for human living. During the past decades, the rapid economic growth of Thailand has elevated water demand in all sectors, while drought and flooding problems due to climate change and deforestation have increased at the same time. A good water management program is the key to confronting this situation.
EGCO Group realizes such importance of water management and has therefore determined a full cycle water management scheme to promote the most efficient internal water usage following the 3Rs Water Management Principle that comprises Reduce, Reuse and Recycling, as well as monitoring the quality of wastewater on a regular basis.
Water Reduction by Increasing Water Reuse Cycles in the Cooling Tower of EGCO Cogen Power Plant
During the past years, EGCO Group has implemented the project to minimize water consumption in the power plant focusing on optimizing water usage as much as possible. In 2022, EGCO Cogen Power Plant initiated the project to increase water reuse cycles in the cooling tower of the power plant. The objective of this project is to minimize wastewater discharge from the blowdown cooling tower by increasing the number of water cycles in the water treatment system. This project helps reduce the costs of raw water and chemical usage in cooling towers, as well as decreasing scaling and calcium and manganese accumulation in the system.
Benefits of the Project
- Reduction of raw water usage in the power plant.
- Reduction of chemicals used in cooling towers.
- Reduction of cooling tower management costs.
Implementation Approach
- Increase the number of water treatment cycles in the cooling tower from 8 cycles to 9.5 cycles.
2022 Performance
19,956 m3 reduction of water consumption.
160,000 baht cost reduction due to chemicals used in the cooling tower.
400,000 baht cost reduction due to decreasing water consumption.
Wastewater Treatment for Reusing Water in the Power Plants
All power plants overseen by EGCO Group have efficiently implemented water management plans and wastewater treatment processes with the target to optimize water consumption to the full extent. For example, Ban Pong Power Plant and EGCO Cogen Power Plant reuse the treated wastewater from the final ponds to water their gardens and clean the floor within their facilities, which helps cut down the cost of water consumption of the plants.
Benefits of the Project
- Reduce the amount of wastewater discharged into public water bodies.
- Reduce the cost of water usage of the power plants.
Implementation Approach
- Reuse the treated wastewater from the wastewater treatment system within the power plant area.
2022 Performance
Ban Pong Power Plant:
17,685 m3 of water was reused.
EGCO Cogen Power Plant:
99,939 m3 of water was reused.
Ban Pong Power Plant:
82,412 baht reduction in water cost.
1,998,780 baht reduction in water cost.
Reuse of Treated Wastewater within Khanom Power Plant
The objective of reusing treated wastewater within Khanom Power Plant project is to optimize water consumption. Treated wastewater is collected in a pond for further usage including growing aquatic plants and watering trees and gardens around the power plant.
Benefits of the Project
- Reduce the amount of wastewater discharged into public water bodies.
- Reduce the cost of water usage of the power plant.
Implementation Approach
- Reuse the treated water from the wastewater treatment system within the power plant area.
2022 Performance
8,822 m3 of water was reused within Khanom Power Plant.
35,288 baht reduction in water cost of Khanom Power Plant.
Reuse of Treated Wastewater within Quezon Power Plant (QPL) and San Buenaventura Power Plant (SBPL)
Treated wastewater from San Buenaventura Power Plant (SBPL) and Quezon Power Plant (QPL) is utilized within the plants for the following purposes.
- Spraying on the bottom ash handling system (BAHS) and on the road within the plants to prevent dust dispersion.
- Cleaning condensers.
- Reducing the temperature of exhaust gas from an electrostatic precipitator (ESP).
- Using water in reverse osmosis (RO) water treatment system.
Benefits of the Project
- Reduce the amount of wastewater discharged into public water bodies.
- Reduce greenhouse gas emissions from wastewater.
Implementation Approach
- Reuse the treated wastewater from the wastewater treatment system within the power plant area.
2022 Performance
A total of
81,067.36 m3 of water was reused at Quezon and San Buenaventura Power Plants
16.78 tons of CO2e of greenhouse gas emissions were avoided due to reusing treated wastewater at Quezon and San Buenaventura Power Plants.