Water General Direction. Canary Islands Government. Spain

Water advanced technical experience in the Canary Islands

Juan Carlos Ibrahim Perera

THE CANARY ISLANDS EXPERIENCE

Summary

1. HYDROLOGIC PLANNING Resources evaluation Offered and demanded water evolution

2. NEW WATER TECHNOLOGIES

Advanced technical experience New Technologies

3. CONCLUSIONS

Demanded water evolution

URBANA: Fresh water urban consumptionTOURIST: Fresh water tourist consumptionINDUST: Industrial consumptionAGRIC: Agriculture consumption

Offering water evolution

REUT: Reuse water (Regenerated waste water)DES M: Desalinated sea waterDES S: Desalinated brackish waterSUBT: Underground waterSUPERF: Surface water

Not conventional water evolution

DS PRIV: Private desalination brackish waterDS PUBL: Public desalination brackish waterDM PRIV: Private desalination seawaterDM PUBL: Public desalination seawaterREUT: Reused water (In waste water plants)

Las Palmas M.E.D. 2.005 Desalination Plant

Lanzarote IV turbopumps

Turbopump train with Pelton

ADVANCED TREATMENTSWASTEWATER REUSE FILTERED PROCESSES

WITH WATER FROM THE SECONDARY TREATMENT

- Classical: Físico – chemical + sand filtered

- Membranes

* Submerged in tanks (extracción al

vacío)

* Inside pressure vessels

SUBMERGED IN THE BIOREACTOR (M.B.R.)

- Ultrafiltration membranes

* Hollow fiber

* Flat sheet membranes

Las Palmas II (Ultrafiltration Norit)

It is in agreetment with the normatives from: World Health Organization for unlimited irrigation water International Maritime Organization for bacteriological

limits Europe Directive for swimming water Title 22 California reuse criterials for water reuse

Water product quality limits: S.S. < 5 ppm Turbidity < 2 NTU Escherichia coli < 100 ufc/100ml

Waste water membranes technologies processes

CONCLUSIONS

The Canary experience during the last 40 years is a proof of how the new technologies can guarantee the quantity and quality of the not conventional resources

The actual Canary Islands Hydrologic Balance has been done adding not conventional resources to the natural system

During the next years the production of sea water and reused water will continue increasing

This stage includes a great energy dependence

The evolution of the new technologies will surely suppose less specific energy consumptions

These new technologies will surely reduce the enviromental water quality limits for the waster water plants product