At its zeolite production site, Clariant faced the challenge of removing high concentrations of copper from its wastewater. Trevi delivered a targeted treatment solution combining physico-chemical separation and selective ion exchange, backed by lab and pilot testing.
Challenge
Clariant’s production process generates wastewater with elevated copper levels, a key pollutant requiring removal before discharge. In addition to effective copper extraction, the plant also needed to address emissions of volatile compounds like hydrogen sulfide (H₂S) and ammonia (NH₃), as well as manage generated sludge on site.
Solution
Trevi performed laboratory trials and an on-site pilot to determine the best treatment pathway. The final design included a physico-chemical process that precipitates copper using coagulation and flocculation, followed by sedimentation. To meet stringent discharge limits, a polishing step with selective ion exchange was integrated to remove residual copper traces. An activated carbon air scrubber captures any H₂S and NH₃ emissions, ensuring safe operation. For sludge management, a storage tank allows for decanting before the sludge is dewatered by the client.
Result
The full-scale installation ensures Clariant consistently meets environmental standards for copper discharge. Thanks to Trevi’s test-based approach and full design-build delivery, the treatment system is reliable, scalable, and tailored to the site’s specific production needs. Ongoing sludge and air treatment components further contribute to safe, compliant operations.
