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Toxic Emissions & Waste

Reducing Coal Generation Capacity In contrast, bottom ash is heavier and settles at the bottom 1. Recycling and Reuse:
of the furnace. Although it has fewer applications than fly Fly ash is repurposed as a key ingredient in cement and
ash, bottom ash can be used in construction for road-based concrete production, reducing the demand for virgin raw
We have made a firm commitment: Our focus is solely on materials and structural fills. materials.
the operation of existing coal-fired power plants, not to build
any new coal plants and no longer investing in greenfield Since fly ash and bottom ash are regulated as per the 2. Safe Storage:
coal plants since 2021. We are shifting from fossil fuels to Environmental Quality (Scheduled Wastes) Regulations 2005 When recycling is not feasible, the ash is transported to
greener sources. This decision underscores our dedication to requirement, both types of ashes can cause a significant secure, licensed landfill sites that adhere to environmental
transitioning toward a low-carbon energy system without impact on the environment if not managed and disposed standards stipulated by the Department of Environment (DOE).
expanding our reliance on coal. Instead, we are committed to of properly. Fly ash, if released into the atmosphere, can
deliver clean generation through renewable capacity growth, contribute to air pollution, and poses health risks through 3. Integration of Technology:
carbon management and coal generation capacity reduction. inhalation. It can also contaminate water sources if it leaches Our ASH Management System utilises digital tools to
into groundwater. Bottom ash, though less prone to becoming streamline the process, making it easier to manage
Coal Combustion By-product and its Environmental airborne, can still pose a risk through soil and groundwater consignment notes and track the life cycle of the ash.
contamination if not properly contained. Therefore, safely
Impact handling both fly ash and bottom ash is essential to prevent ASH Management System was designed to monitor and
environmental harm. oversee the fly ash and bottom ash that our coal-fired
Ash is the by-product of coal combustion, produced when power stations produce. We have implemented this system to
coal is burned at high temperatures to generate electricity. It Fly ash and bottom ash from our power generation operations ensure safe and efficient ash management in compliance with
consists of fine particles or heavier residue, depending on constitute 99% of our total hazardous waste generated. The Malaysia’s environmental regulations, particularly the
the type of ash, and can either be disposed of or repurposed remaining hazardous waste is mainly used transformers, used Environmental Quality (Scheduled Wastes) Regulations 2005.
for construction applications. These ashes are considered lubricating oil, used batteries and e-waste.
hazardous waste and are strictly regulated under the The Consignment Note Monitoring process is a key
Environmental Quality (Scheduled Wastes) Regulations 2005. component of our ASH Management System. Each power
Managing Ash the TNB Way, A Responsible Way station that generates fly ash or bottom ash issues a
There are two main types of ash produced from coal burning to consignment note, which records ash production, transport,
generate electricity: fly ash and bottom ash. Our approach to handling the coal combustion byproducts and disposal. This ensures complete traceability from the
such as fly ash and bottom ash reflects our commitment point of generation to its final disposal or recycling.
Fly ash is a fine, powdery material that rises with flue gases to environmental responsibly through circular economy
during combustion and is captured using filtration systems principles and integration of technology: We closely monitor all ash produced to ensure it complies with
such as electrostatic precipitators or bag filters. It contains regulatory requirements. This helps to maintain transparency
components like silica, alumina, iron oxide, and traces of and accountability in how we manage our ash. Through the
unburnt carbon. Fly ash can be reused in construction ASH Management System, we track and document all
materials like cement and concrete, where it improves the movements of ash, ensuring that it is safely disposed of at
strength and durability of these products. approved landfills or approved recycling facilities.

Carbon Management Water Management Biodiversity & Land Use Opportunities in RE Toxic Emissions & Waste
Human Capital Development Health & Safety Labour Rights Supply Chain Management Community Relations Corporate Governance