Remineralisation in La Aldea: what to check when integrating desalinated water treatment equipment
Expanding post-treatment requires coordination of equipment, water quality and day-to-day operation. The news from La Aldea de San Nicolás provides useful context for engineering firms and facility managers preparing desalinated water remineralisation projects in the Canary Islands.
The news: an agreement to transfer remineralisation equipment
The BOC of 5 October 2026 publishes the resolution of 23 September concerning the temporary transfer of eight tanks from Puerto Naos, La Palma, to the Consejo Insular de Aguas de Gran Canaria. Their intended destination is the La Aldea de San Nicolás desalination complex.
The publication formalises an agreement; it does not announce an open tender or confirm that installation has already been completed. The commercial needs described below are possibilities to discuss with the project manager, rather than confirmed orders.
The role of remineralisation after reverse osmosis
Reverse osmosis reduces the salt content of water, but permeate quality must also be assessed in relation to its intended use and the downstream network. WHO explains that desalinated water may require conditioning to reduce its aggressiveness towards certain materials.
Calcite beds are one solution for remineralisation. Post-treatment objectives must be defined using water analyses and the overall design; disinfection remains a separate barrier. A pH measurement alone does not demonstrate that every aspect of water quality is under control.
What to check before integrating existing equipment
For an integration contractor, the first practical step is to turn the project into a list of interfaces: what it receives, what it connects the equipment to and what it must hand over to the operator. These questions help define the work without assuming the condition of the La Aldea equipment.
Documentation and inspection
Request drawings, available service history, manuals and a component list. Identify the checks to be carried out by competent personnel and who will accept the results. For reused equipment, record any issues found and decisions on repair or replacement before finalising the quotation.
Connections and operation
Review connection points, flow distribution, isolation devices and the access needed to operate each unit with the engineering team responsible. Include the piping, support and signal modifications that are actually required within the scope. Confirm how the work will be coordinated to maintain continuity of service.
Consumables, instrumentation and maintenance
Define who will specify the mineral media, which documents will be required from the supplier and how replenishment will be planned. Also agree on spare parts inventory, sampling points, instrument maintenance and the handover of procedures to the operator. Logistics planning must be based on calculated consumption and actual access conditions.
Information for comparing quotations with the same scope
A clearly defined request for quotation avoids one company quoting only for materials while another includes installation and testing. This table provides an initial checklist for preparing a technical enquiry:
| Information to gather | Decision it helps define |
|---|---|
| Location and access conditions | Transport, unloading equipment and organisation of the work. |
| Water analyses and post-treatment objective | Technical requirement for the engineering team to assess. |
| Design flow rate and operating regime | Operating conditions to be covered by the quotations. |
| Drawings, connections and available equipment | Existing materials and modifications included in each proposal. |
| Deadlines and acceptance criteria | Testing, documentation and handover responsibilities. |
Technical support for companies delivering projects in the Canary Islands
Engineering firms, construction companies and operators based in the islands or mainland Spain may need a local contact to clarify materials, integration or maintenance requirements. Before seeking collaboration, separate work already contracted from outstanding needs and confirm with the owner which interventions are authorised.
HidroSoluciones Canarias offers solutions for drinking-water treatment, conditioning and monitoring, as well as spare parts and maintenance for desalination plants. These services provide a basis for enquiries about the technical scope of a project. Feasibility, availability and the terms of any proposal require a project-specific assessment.
Sources
- BOC 199, notice 3429, published on 5 October 2026: agreement to transfer equipment.
- WHO: Safe drinking-water from desalination (2011), sections on post-treatment and remineralisation.
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