Water Management

Supporting the SDGs Goals

Goal 6:

Clean Water and Sanitation

Goal 14:

Life Below Water

Goal and Performance Highlights

Ratch Pathana Energy Power Plant

Goal

Reduce process water consumption by reusing at least 40,000 m³ of treated wastewater (3% of total water usage).

Performance

48,350.20 m³ of wastewater was reused, Achieving % of total water savings.

Goal

Reduce office water consumption by at least 2,593.8 m³ (40% of total office water use).

Performance

2,996.17 m³ of office water was saved, Achieving % reduction.

Sahacogen Green Power Plant

Goal

Reduce process water consumption by reusing at least 45,000 m³ (9.74% of total water usage).

Performance

53,432 m³ of wastewater was reused, Achieving % of total water savings.

Goal

Reduce office water consumption by 346 m³ (4% from the 2023 baseline).

Performance

1,105 m³ of office water was saved, Achieving % reduction.

Sahagreen Forest Power Plant

Goal

Reduce process water consumption by reusing at least 20,000 m³ annually (5.13% of total water usage).

Performance

15,507 m³ of wastewater was reused, Achieving % reduction.

Goal

Reduce office water consumption by 1,000 m³ (45.64% from the 2023 baseline).

Performance

1,637 m³ of office water was saved, Achieving % reduction.

Water Consumption Statistics

	2022	2023	2024
Ratch Pathana Energy Power Plant
Water Consumption (m³)	1,824,400	1,908,007	1,698,676
Water Intensity (Withdrawal/MWh net)	1.74	1.98	2.40
Treated Wastewater (%)	100	100	100
Water Management Approach	Industrial Park Treatment System / Green Area / RO Rejected Water Recycle
Sahacogen Green Power Plant
Water Consumption (m³)	311,616.00	57,221.00	355,857.01
Water Intensity (Withdrawal/MWh net)	4.96	5.36	5.34
Treated Wastewater (%)	100	100	100
Water Management Approach	Industrial Park Treatment System / Green Area
Sahagreen Forest Power Plant
Water Consumption (m³)	400,671.00	448,220.00	391,445.67
Water Intensity (Withdrawal/MWh net)	7.12	7.93	4.68
Treated Wastewater (%)	-	-	-
Water Management Approach	Zero Discharge Policy

Challenges and Opportunities

Ratch Pathana and Affiliates has adopted a comprehensive approach to sustainable water management, focusing on water resource allocation, risk mitigation related to water scarcity, and continuous improvement in water use efficiency within operational processes. The Group recognizes that this area presents both challenges and business opportunities, as outlined below

Challenges	Business Opportunities
1. Water Scarcity Risks Although water is allocated from designated sources and reserve storage is in place, certain power plants—such as Ratch pathana Energy Power Plant, which relies on water sources spanning multiple provinces—remain at risk during periods of drought or flooding. These extreme weather events may disrupt access to key water sources, necessitating proactive contingency planning.	1. Technological Advancement and Innovation The development of projects like RO Rejected Water Recycle and large-scale water reservoirs reflects the Company’s commitment to water innovation. These initiatives can position the Company to lead in water technology and potentially offer water treatment services to other industries in the future.
2. Compliance with Regulations and Standards The Company must consistently comply with legal requirements related to water discharge quality, such as maintaining cooling water discharge temperatures below 40°C. This demands regular monitoring, upgrades, and ongoing improvements in water management systems to prevent environmental harm.	2. Cost Reduction Implementing water recycling technologies within production processes helps reduce dependency on public raw water sources. This, in turn, lowers costs related to raw water intake and wastewater treatment, contributing to overall operational efficiency.
3. Capital Investment Costs Investing in advanced water treatment systems, such as the RO Rejected Water Recycle system, and the construction of large-scale water reservoirs involves high upfront costs. Effective budget planning and forecasting of long-term returns on investment remain critical challenges.	3. Partnerships with Government Agencies and Communities Collaborations with government entities—such as the Royal Irrigation Department and the Ministry of Natural Resources and Environment—as well as securing water supply agreements, create opportunities for long-term partnerships. These alliances enhance business stability and support future expansion strategies.

Management Approach and Value Creation

Ratch Pathana Energy and Sahacogen Green Biomass Power Plants

RO Rejected Water Recycled in 2024, resulting in Water Saved in Production of

cubic meters per year

Ratch Pathana Energy and Sahacogen Green Biomass Power Plants are located within the Saha Industrial Park, utilizing water from designated industrial water sources that provide sufficient reserves for production, without affecting local community water supply. Process Water Treatment and Reuse: Neutralization Basin: Water from production processes undergoes quality adjustments before being transferred to the wastewater treatment system of the Saha Industrial Park. Water Reuse Initiatives: Treated water is repurposed for landscaping irrigation, with excess water discharged into external water bodies in full compliance with legal discharge standards. Cooling System Compliance: Water discharged from cooling systems is regulated to not exceed 40°C, in accordance with legal temperature limits for environmental protection.

Sahagreen Forest Biomass Power Plant

Sahagreen Forest Biomass Power Plant has adopted a comprehensive water management strategy by constructing a 40-rai water reservoir with a storage capacity of

cubic meters per year,

ensuring a stable water supply for year-round power generation.

Key Features of the Water Management System: Sediment Separation & Main Reservoir: Designed to maintain water quality, reduce the need for chemical treatment, and minimize wastewater discharge. Green Belt Initiative: Windbreak trees have been planted around the reservoir to reduce water evaporation and facilitate water reuse in power generation. Zero Discharge Approach: All treated water is retained and reused for landscaping irrigation, with no wastewater discharge into external water bodies.

To ensure compliance and minimize environmental impact, the plant strictly monitors water quality and cooling water temperatures as per legal requirements. Additionally, regular ecological assessments are conducted to safeguard the local aquatic ecosystem.

Water Management at Power Plants
- Ratch Pathana Energy Power Plant (Chonburi Province): Sources raw water from a regional water network covering three provinces: Chonburi, Rayong, and Chachoengsao.Secured a 10-year long-term water supply contract with backup reserves for emergency situations.
- Ratch Pathana Energy & Sahacogen Green Biomass Power Plants: Located within the Saha Industrial Park, utilizing dedicated industrial water sources that do not impact local community water supply.
- Sahagreen Forest Biomass Power Plant: Constructed a 40-rai water reservoir with a storage capacity of 370,000 cubic meters per year, ensuring year-round power generation.
Water Risk Assessment
- Water stress, flood risks, drought conditions, and water quality concerns.
- Short-term (annual) and long-term (project lifecycle) risk evaluations.
- Utilization of risk assessment results to develop and enhance preventive and mitigation plans.
- Annual risk reviews to refine strategies based on improved forecasting data.
Additional Measures for Efficient Water Management
- Installation of water treatment systems before water enters production processes.
- Increased water recirculation cycles in cooling systems to reduce raw water consumption.
- Reuse of treated RO wastewater for applications such as landscaping and green spaces.
- Regular inspections of water pipelines to prevent leaks and minimize water loss.
Optimization of Water Usage through the 3Rs Approach (Reduce-Reuse-Recycle)
- Reduce water usage in production by increasing recycling loops within cooling tower systems.
- Reuse treated wastewater as a substitute for raw water, reducing dependence on public water sources.
- Recycle and consistently monitor discharged water to ensure compliance with environmental standards and minimize community impact.
Collaborative Water Resource Management
- Engagement with government agencies, such as the Royal Irrigation Department and the Ministry of Natural Resources and Environment, along with local communities, to align water usage with availability.
- Monitoring water forecasts and watershed conditions to anticipate fluctuations in supply.
- Establishing agreements with water suppliers to secure emergency water reserves in case of shortages.

Wastewater Discharge and Quality (2022-2024)

Parameter	2022	2023	2024
Ratch Pathana Energy Power Plant
Wastewater Discharge Volume (m³/year)	536,531	670,593	239,143
Water Quality
Temperature (°C)	31.8	31.8	32.6
pH Level	7.7	7.6	7.6
Biochemical Oxygen Demand (BOD) (mg/L)	2.0	2.5	2.3
Chemical Oxygen Demand (COD) (mg/L)	50.1	48.9	40.3
Total Dissolved Solids (mg/L)	863.6	855.4	805.5
Sahacogen Green Power Plant
Wastewater Discharge Volume (m³/year)	54,760	48,627	60,000
Water Quality
Temperature (°C)	32	34	33
pH Level	8.7	8.7	8.8
Biochemical Oxygen Demand (BOD) (mg/L)	21.1	11.6	9.0
Chemical Oxygen Demand (COD) (mg/L)	161	80	97
Total Dissolved Solids (mg/L)	< 3.0	< 3.0	< 3.0
Sahagreen Forest Power Plant
Wastewater Discharge Volume (m³/year)	78,419	58,740	51,082
Water Quality
Temperature (°C)	31	31	31
pH Level	7.5	7.9	8.0
Biochemical Oxygen Demand (BOD) (mg/L)	11.6	9.3	8.7
Chemical Oxygen Demand (COD) (mg/L)	118	87	75
Total Dissolved Solids (mg/L)	< 3.0	< 3.0	< 3.0