01 What Happened

An industry article from TEDAGUA published on August 10 highlights compact modular treatment as a route to faster wastewater-reuse deployment in Spain. The Adeje-Arona WWTP in Tenerife is presented as a case study producing approximately 5,700–6,000 m³/day of reclaimed water for irrigation. Its treatment train combines equalisation, multilayer filtration, cartridge filtration and three independent reverse-osmosis trains, with reported RO recovery of 70–75 percent.

02 Key Takeaways

  • 01 Adeje-Arona produces roughly 5,700–6,000 m³/day of reclaimed water for irrigation.
  • 02 Three independent RO trains improve maintenance flexibility and partial-load operation.
  • 03 Modular CAPEX can follow demand growth, but recovery remains constrained by scaling, fouling, energy and concentrate management.

03 Why It Matters

The strongest lesson from Adeje-Arona is not that compact plants are automatically cheaper; it is that modularity changes how capacity risk is financed and operated.

04 ATLAS Engineering View

Three independent RO trains allow maintenance and partial loading without taking the whole reclamation system offline. That architecture is useful where reuse demand grows in phases, because membrane, pumping and electrical capacity can be added in blocks instead of committing all CAPEX on day one.

The reported 70–75 percent RO recovery must still be read in the context of feed chemistry and irrigation end use. Higher recovery is not always better if silica, hardness, salinity or organic fouling drive scaling and cleaning frequency. Equalisation, multilayer filtration and cartridge protection upstream of RO are therefore part of the membrane economics, not auxiliary equipment. Under Spain’s increasingly risk-based reuse framework, traceability, monitoring and operational robustness will matter alongside final water quality.

05 Sources