While traditional water disinfection methods such as chlorine and chloramine have served their purpose for decades, they come with inherent limitations and risks that no longer align with the needs of modern water infrastructure. These challenges are becoming increasingly apparent, particularly as we strive for a more sustainable, efficient, and environmentally responsible approach to water treatment.
Current Disinfection Challenges in NZ
These challenges increase cost, environmental load, and operational complexity, especially as regulatory and public expectations rise.
Chlorine Dependency
Traditional disinfection relies heavily on chlorine, a powerful yet harsh chemical that can leave byproducts and requires stringent handling.
Health & Safety Risks
Workers must manage hazardous chemicals, increasing risk of exposure and requiring PPE and containment procedures.
Environmental Impact
Excess chlorinated water poses risks when discharged into the environment. Time-Intensive Process: Current methods can delay commissioning due to long treatment times and post- treatment flushing.
Time-Intensive Process
Current methods can delay commissioning due to long treatment times and post-treatment flushing.
The Problem with Current Water Treatment Methods
Chemical Dependence and Residual Contaminants
Traditional disinfection methods primarily rely on chlorine or chlorine-based compounds. While effective at killing harmful bacteria, viruses, and pathogens, these chemicals have several drawbacks:
- Residual Chlorine – After the treatment process, chlorine residues can remain in the water, potentially leading to unwanted tastes, odours, and, in some cases, negative health effects when consumed in high concentrations over time.
- By-Products – Chlorine reacts with naturally occurring organic matter in the water, producing harmful by-products like trihalomethanes (THMs) and haloacetic acids (HAAs), which are carcinogenic and subject to strict regulatory limits in many jurisdictions.
- Environmental Impact – The use of chlorine and other chemicals poses risks to the environment, especially if any disinfection by-products are released into waterways or ecosystems. This can lead to toxic effects on aquatic life and damage to local biodiversity.
Operational Challenges and Inefficiencies
While effective, the current disinfection methods are also costly and resource-intensive. The treatment process often requires significant time and manpower to manage, monitor, and ensure compliance with regulatory standards. These methods are not only expensive to implement but also costly to maintain, especially in remote or hard-to-access locations.
- Complex Logistics – Transporting and storing large quantities of chemicals poses logistical challenges, including the risk of leaks, spills, or accidents during transit. The equipment required to manage chemical dosing is bulky and requires highly skilled operators.
- Time-Consuming – Chlorine-based treatments often require prolonged contact times
(sometimes up to 24 hours or more) to ensure effective disinfection. This delays the overall commissioning of newly installed pipelines and can lead to disruptions in service delivery. - Health and Safety Concerns – The handling and application of chlorine-based chemicals require stringent safety measures to protect workers, communities, and the environment. These procedures add an additional layer of complexity and risk to the treatment process.
Lack of Sustainability and Environmental Responsibility
The growing demand for environmentally conscious water treatment solutions is driving the need for innovation. Traditional chemical methods are increasingly being scrutinised for their negative impact on both human health and the environment.
- Chemical Waste – The disposal of chemical by-products from chlorine treatments creates a waste stream that must be carefully managed. Improper disposal can lead to contamination of soil, groundwater, or surface waters.
- Carbon Footprint – The production, transportation, and application of chlorine and other chemicals contribute to greenhouse gas emissions, adding to the overall carbon footprint of water treatment operations.
- Public Perception and Demand for Safer Solutions – As communities become more environmentally conscious, there is an increasing demand for safer, chemical-free water treatment solutions. Public concerns about the health risks associated with chlorine by-products are driving local authorities and water companies to explore alternatives.
A Call for Innovation and Change
While these traditional methods have been the backbone of water disinfection for many years, the challenges they present can no longer be ignored in the face of modern environmental concerns, regulatory changes, and the evolving needs of the water industry. It is time for a more sustainable, efficient, and safer alternative—one that delivers all the benefits of disinfection without the downsides of chemical treatments.
This is where Ozone technology comes in.
The Solution - Ozone Technology