Water reuse nexus with resource recovery: On the fluidized-bed homogeneous crystallization of copper and phosphate from semiconductor wastewater

Lester Lee E. Bayon, Florencio C. Ballesteros, Sergi Garcia-Segura, Ming Chun Lu

Research output: Contribution to journalArticlepeer-review

3 Scopus citations

Abstract

Green and sustainable strategies aim for the development of manufacturing processes that maximize the use of resources instigating semiconductor industry to adopt zero-liquid discharge policies. Complexity and variations of semiconductor wastewater effluents opens an opportunity for resource recovery (i.e. copper from chemical-mechanical polishing) including heavy metals and inorganic ions (i.e. phosphate from acid cleaning). This present work demonstrates the capabilities of fluidized-bed homogeneous crystallization as treatment technology to process water effluents for industrial reuse while simultaneously recovering precious resources such as copper and phosphate. Operational variables have been optimized considering the combination of both effluents to produce high quality copper phosphate granules. The optimum copper percentage removal and crystallization efficiency were 99% and 96.07% respectively obtained at pHe 6.0–6.5, 1.25 [PO4 −3]in/[Cu2+]in at hydraulic retention time 22.5 min with 0.51 kg Cu2+/m2 h and fixed [Cu2+]in loading of 4.5 mM. The recovered crystals have an average particle diameter of ∼1 mm and were characterized identifying libethenite (Cu2PO4OH) as main recovered products.

Original languageEnglish (US)
Article number117705
JournalJournal of Cleaner Production
Volume236
DOIs
StatePublished - Nov 1 2019

Keywords

  • Fluidized bed reactor
  • Heavy metals
  • Industrial wastewater treatment
  • Resource recovery
  • Waste revalorization

ASJC Scopus subject areas

  • Renewable Energy, Sustainability and the Environment
  • Environmental Science(all)
  • Strategy and Management
  • Industrial and Manufacturing Engineering

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