No abstract

The high organic load of the effluent generated in these farms has an important environmental impact, which is amplified in insular or isolated territories. The application of natural treatment systems of wastewater (NTSW) has demonstrated their suitability in these environments, but their design lacks proper characterization and sizing tools for their adequate operation. This work proposes a series of strategies and tools for the design and characterization of NTSW. As an application, an inventory, characterization, sizing, and design is carried out in 9 pig farms with a high environmental impact located on the island of Gran Canaria (Spain). The proposed tools in this work are based on a collection of experimental data over a five-year period of application of NTSW in real farms. This work contributes to facilitate the design and implementation of NTSW in farms located in isolated, island or similar size environments.

The penetration of renewable energies in island environments poses a series of challenges such as stability, demand response and guarantee of supply, among others. Throughout this work, a study methodology will be presented based on the current conditions of electricity demand in the Canary Islands and their electricity production system to mitigate the emission of greenhouse gases and improve the penetration of renewable energies in island electricity systems. Based on the initial data, a tool will be proposed that optimizes the energy production system through combustion technology (non-renewable) and combines it with the production of energy through renewables that meet expectations both in dynamic response, safety, scaling and integration with renewable energy systems, in terms of efficiency and power. Resulting in a series of cases, under different operating conditions, providing different scenarios and an expansion of up to 36.78% of the renewable installed capacity in the Canary Islands (70% in Gran Canaria) with a reduction of 65.13% of tCO2eq and a reduction in fuel consumption of 71.45%.