When everything is possible, what is valuable?

For all the innovators out there: the problem is already solved. For decades it’s been possible to treat any wastewater stream to the conditions needed for discharge or re-use. Layer on enough treatment steps, chemistry and downstream processes and you can usually get to the target. Eventually.

How challenging it is to get there is a whole different story. We’ve seen sites with 5 unit processes hit the treatment target (success!), but achieve < 25% water recovery (yikes!). The more complex the waste stream, the more footprint, capital and operational support that is required. The opportunity for innovation isn’t in the outcome, it’s in the path to get there.

Industrial facilities are not blank sheets of paper

Trying to adapt an existing facility is twice as hard as building a new one from scratch. New products, more demand, or changing POTW targets happen, but trying to expand every unit process can be impossible when looking at the hard reality of available footprint.

And footprint is only the most visible constraint. Existing facilities have tanks and piping that are already in use, utilities with finite capacity, operators with finite time, and production that needs to keep running while changes are made. A process that looks simple on a PFD can become significantly more complicated once you figure out how to actually install it.

The needs of a retrofit changes the engineering question. On a blank sheet of paper, you might ask: What’s the best process to treat this water? Inside an operating facility, the better question is often: What can we change without having to change everything else?

Every process step has to earn its place

Treatment equipment doesn’t exist in isolation. Add a process step and you likely will be adding tanks, pumps, piping, controls, utilities, chemistry, redundancy, maintenance and another system for operators to understand. A relatively inexpensive piece of equipment can become a much larger project by the time it’s integrated into an operating facility.

None of this means that complex treatment trains are bad. Water is complicated. Some waste streams genuinely need multiple technologies working together, and adding another process can absolutely be the right answer. But complexity should earn its place.

That’s become one of the more useful ways I’ve found to think about industrial water projects: don’t just ask what a process does, ask what it causes. 

If adding one process eliminates the need from three others, unlocks unused capacity elsewhere, or delays a major infrastructure expansion, its value can be much greater than its individual treatment performance suggests. The opposite is also true. A technology can produce exceptional water quality but require so much supporting infrastructure that the overall system becomes harder to justify.

The best solution isn’t always the one that does the most

I think the definition of “performance” in industrial water needs to broaden. Two treatment approaches can produce exactly the same effluent quality while placing dramatically different demands on the facility around them.

One might require more chemistry. Another might consume valuable footprint. One might need significantly more operator attention. Another might create a CIP waste stream that requires additional treatment. One might require a major construction project, while another can be integrated into infrastructure that is already there. The water coming out could look identical. That means that hitting the treatment target is only one measure of performance.

As we talk with industrial facilities, some of the most valuable outcomes are operational. They’re things like creating more capacity within the same footprint, increasing hydraulic capacity without rebuilding the entire treatment train, accommodating more variable waste from new products, or delaying a much larger capital project. These outcomes are harder to put on a datasheet, but they determine whether a project actually gets built.

“Can it treat the water?” is a technical question. “Can we actually implement it here?” is the one that matters.

When almost anything is technically possible, innovation isn’t just about funding another way to reach the treatment target. It’s about getting there with less infrastructure, less complexity and fewer constraints. Sometimes the best measure of innovation is what you don’t have to add.