Manufacturing experts are realizing that conventional water-use practices are unsustainable, leading to the adoption of conservation practices and net-zero goals. These shifts refine environmental and financial responsibilities across the sector, challenging stakeholders to embrace water circularity as a central strategic element. Sector thought leaders advocate for these shifts because they enhance decarbonization, reduce scarcity and conserve other resources beyond water.
Reducing Direct Energy Consumption From Water Transport
Reusing water directly supports a closed-loop system, reducing pressure on energy equipment. Pumps require significant energy consumption, especially when demanding immense pressure to travel upward from subsurface reserves or going long distances from rivers. On-site treatment and recycling reduce Scope 2 emissions from indirect sources, allowing sites to exercise greater control over their assets. It even helps reduce the power required to pump wastewater, as localized processes can lower electricity consumption.
Up to 40% of a plant’s expenses are attributed to energy, and efficiency efforts can cut this by as much as 30%. Moving water from one location to another also consumes significant energy. Centralizing water movement also minimizes losses from leaks throughout piping networks, wasting even more resources. If a manufacturing facility can remove these time-consuming procedures, then overall energy footprints and associated costs will drop dramatically.
This is a problem worldwide, as pump industry expert from North Ride Pumps, Pablo Martinez-Moore recounts, saying,
“Water reuse is becoming critical to processors and manufacturers not only due to bills rising on average by as much as 20% in the UK but also due to increased treated waste disposal costs which have climbed to the region of £35-100 per m³.”
Recovering Thermal Energy From Wastewater
Over 80% of wastewater is dumped into the environment without sufficient treatment, increasing the adverse environmental impact of manufacturing enterprises beyond excess water consumption. The technology used to separate solids and other contaminants from manufacturing water often requires high temperatures, and the output also requires cooling.
Harnessing and reusing energy from process wastewater is another facet of net-zero, circular operations in facilities. Deploying heat exchangers and capture mechanisms is critical for reducing reliance on natural gas and other fossil fuels. This reused heat can warm boilers for other sanitation and treatment purposes. Heat recycling reduces stress on local utilities, especially during peak hours when electricity demand spikes.
A case study of an Austrian dairy manufacturer proved how even the most energy-intensive industries can capture heat. Refrigeration is a high electricity consumer, and the company managed to support it after it instituted a cleaning-in-place system and a high-temperature heat pump to recycle waste heat, thereby lowering water demand in steam applications. The savings compared to natural gas were 600 kilograms of carbon dioxide per day, inspiring additional projects.
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Lowering the Carbon Footprint of Chemical Treatment
Implementing more advanced treatments also enables more straightforward water circularity by removing chemical contaminants. This should happen on-site whenever possible. It is crucial to reduce dependence on off-site treatment, as it shifts the carbon footprint and responsibility to another entity. Membrane-based technologies, such as reverse osmosis and bioreactors, reduce the need for pollutants, such as biocides, lowering stress on treatment operations and increasing the amount of potential reusable water.
Director of Business Development at PCL Construction, Inc., Chris Allen, accents this, saying,
“Integrating water reuse into existing manufacturing facilities is helping companies meet self-directed sustainability metrics and reduce their environmental footprint. Doing this requires implementing advanced treatment technologies with operational continuity and constructability. Early collaboration between owners, engineers, builders and technology providers is critical to implementing these circular water strategies without disrupting production.”
Manufacturers aspiring to net-zero will notice a drop in Scope 3 emissions as they cut the need to dispose of chemical-laden materials. Additionally, they reduce indirect emissions by reducing support for the production of chemical-based treatments. Even the most common ones, such as sodium hypochlorite and sulfuric acid, which have a high carbon footprint, are especially prevalent in regions sensitive to global warming where they are produced.
Enabling Sustainable Production of Green Hydrogen
Electrolysis will be one of the most promising green generators in the coming years, and the equipment could be even more climate-friendly and resilient by reusing water from manufacturing. Water purity and sufficient deionization are vital for viability. Using the aforementioned purification methods enables a circular hydrogen life cycle while preserving freshwater resources.
Recycling water for electrolyzers could be especially helpful in areas such as ports, which may use both on-site and offshore technologies. Reclaimed resources that meet purification requirements can be feedstock for electrolyzers, while other filtered water that may be viable for other purposes can cycle through the system for other use cases. In coastal areas, this could be essential until research and development make desalination technologies more affordable to implement.
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Enhancing Climate Resilience and Eliminating Emergency Measures
A manufacturer in a water-stressed area could experience unprecedented downtime and curtailment due to climate factors beyond control. Reuse would prevent these scenarios, especially for critical infrastructure, where downtime could incite societal disruptions. Implementing circularity provides companies with a security blanket against these stressors, boosting uptime even when resources are limited.
If on-site recycling equipment is unavailable, organizations must take considerable measures to secure water to keep production going. Often, these methods directly contradict net-zero goals. For example, businesses may need large-haul trucks to transport large volumes of water long distances. This activity consumes large amounts of fuel and emits pollution. It also stresses nearby regions, which may also be suffering from drought.
The Strategy and Sustainability Advisor of venture capital firm iksait Ventures, Michael Hanf, promotes urgency, explaining,
“Water circularity is becoming a critical resilience measure for industrial companies trying to maintain operations in a more volatile world. In many regions, manufacturers are exposed to two opposing risks at the same time: flooding that disrupts facilities and droughts that restrict water access, both with direct operational consequences. As energy and water costs rise, circular water management is increasingly about protecting production and supply chains, not just sustainability.”
Optimizing Ultrapure Water (UPW) Systems
Manufacturing operations like semiconductors and cell and gene therapies in pharmaceuticals need UPW, which requires extensive treatment through multiple media. As these industries grow, the need for UPW does, too. Industries that use water not considered ultrapure must implement water reclamation to conserve these hard-to-access resources for industries that cannot operate without them.
An Arizona semiconductor fab maker has committed to establishing an industrial water reclamation plant to meet its promise to enhance U.S. chip production by $65 billion while achieving a 90% water recycling efficiency rating. It intends to use multiple treatment methods to make resources reusable, conserving water in the nearby Colorado River. The effort, planned for 2028, will assist a region desperate for additional drought-resilience measures. Despite the project demanding significant volumes, it could reduce water rationing and scarcity in the long term.
The Necessity of Water Circularity
Moving toward an industry focused on decarbonization and repurposing is antithetical to how operations have been running for decades. However, it is essential to support a planet under threat from the climate crisis. Citizens need greater and more dependable access to utilities, and utility providers and treatment facilities alike are responsible for adopting reuse measures to lower costs, respect natural resources and consider accessibility for future generations. Stakeholders must take action this year, revising operations to be leaner and circular.
