Tomorrow Water thinks we should colocate datacenters and sewage plants

If it can cut energy requirements for both, this idea might not stink after all


Tomorrow Water, a subsidiary of Korean firm BKT, is aiming to make datacenters more environmentally friendly by colocating them with sewage treatment plants, an arrangement it claims can save both energy and water.

The idea behind the process is fairly simple: heated water from a datacenter can be used to boost waste water processing, cutting energy requirements for that, while some of the treated water then becomes cooling water for the datacenter.

In Korea, Tomorrow Water has now signed a memorandum of understanding with Samsung, Dohwa Engineering, and BNZ Partners to jointly develop integrated datacenter and sanitation infrastructure solutions based on this process, which the firm calls Co-Flow.

Tomorrow Water already has a partnership in the US with Arcadis, a sustainable design and engineering consultancy firm, to evaluate the Co-Flow process and develop similar datacenter colocation projects there.

So if you ever thought that the internet was a sewer, you may soon not be far wrong.

According to Tomorrow Water, Co-Flow was developed as part of the company's broader initiatives to colocate and interconnect infrastructure elements such as wastewater treatment, renewable energy generation, and datacenter capacity. The aim is to capitalize on their complementary energy, heat, nutrient, and water inputs and outputs to make them more sustainable and affordable to the global population, it says.

Part of the solution is BKT's Proteus wastewater treatment technology, which the firm has already used to modernize a wastewater treatment facility at the Jungnang Water Recycling Center in Seoul. This reduced the plant's total footprint by 60 percent, according to Tomorrow Water, and the resulting freed up space is where datacenter buildings could be constructed if the process were to be replicated at other sites.

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Demand for datacenter space is growing, particularly in the US, but elsewhere in the world as well. However, according to Tomorrow Water, meeting that demand is being thwarted by the lack of useable sites for datacenter construction in urban centers. Co-Flow creates a win-win scenario by enabling datacenters to be developed within the existing footprint of sewage treatment works, while also saving water and energy.

Elsewhere, for one example, Microsoft has partnered with Finland's largest energy company to build a new datacenter near Helsinki that will heat homes as it cools servers, by moving waste datacenter heat via existing water pipes to homes and businesses in the surrounding cities of Espoo and Kauniainen, as well as the municipality of Kirkkonummi. ®

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