This research is based on the plan and design of Datang constructed wetland as a storm water wetland system. Qantity of the discharges from Datan community drainage system including its branches surround Dapeng Bay National Scenic Area are estimated. The objectives of this research is to study the possibilities of using the concept of stormwater wetland system for including the Datan constructed wetland and Lin-Bian right-bank wetland as flood detention wetland system and treatment wetlands during the dry season. Generally, flood detention ponds are not functioning except during storm seasons. Rainfall are mostly concentrated from June to September in southern Taiwan (mainly due to southwest monsoon and typhoon), the Datan wetland has therefore planned to treat the domestic sewages and the disposal from aquaculture farms during the dry season, and first flushing drainage during storm season. Besides the flood detention volume, Datan wetland has been designed into four major sections, a) primary settling for settle part of the suspended particles and aeration; b) bio-filtration through 2 sets of bio-filter using crushed bricks and oyster shells as filter media, mainly designed for BOD removal and partly early denitrification; c) followed by shallow weeds pond for reaeration and nutrients uptake by plantation; d) entering a series of open water ponds for stabilization. Landscape has been take good care for recreative function and habitat reserved for variety of birds. Due to the flood detention function will flood the basin few times a year, variable depth environment and plantations are designed. Wetland maintains ordinary water level at EL=-1.1m, maximum flood detention can go as high as EL=+1.5m. The wetland has effective surface approximately 5.5 ha., maximum flood detention quantity approximately 130,000 cubic meters. Since the area is tidally affected, influents contain different levels of salinities. Plantation becomes a difficult issue for the Datan wetland, due to the saline waters. Mangrove is the best choice, so far, for this situation. The mangrove forest has the richest productivity on wetland ecosystem, and can carry on the physical biology multistage degeneration to the sewage and absorb various pollutants. Hydraulic analysis estimates the peak discharge of Datan drainage system¡¦s 10 year flood frequency is 20.17cms, Datan constructed wetland and Linbian right bank constructed wetland can reduces the peak rate of 8.06cms and 4.38 cms, respectively. In addition, most of the branches of the Datan drainage system are thus achieve the ten year return period bench mark from the HEC-RAS evaluation The water quality monitoring results after one month of operation have shown the average elimination rates, TOC=-10%, BOD5=53%, TKN=71%, NH3-N=88%, NO3-N=65, NO2-N=90%, TN=70%, TP=52%, OP=56%, Chl.a=-61%, SS=4%, the turbidity (NTU)=70%. BOD and nutrients are shown effective reductions, while the SS and the chlorophyll-a are correlated mainly due to the plankton growth in the open waters. Long-term monitoring is continuing for the evaluation of the water quality purification function and the operational management model.

The Dapeng Bay National Scenic Area will be planned as an interna-tional level tourism site. In order to improve the water quality in bay area, the administration authority has removed oyster farm. However, sewage and aquaculture wastewater from the communities and fish ponds around the bay area were still discharged continuously. After careful assessment, The Dapeng Bay National Scenic Area Administration authority decided to use constructed wetlands to treat such kinds of wastewater. In this study, the treatment efficiencies of Datan Constructed Wetland Park were investigated. According to the experimental results, we found that the remove efficiencies of SS, Chl-a, and TOC were not good enough, while the other parameters, such as OP, TP, NO2-, and NO3- their all re-moval efficiencies were all above 40¢H.The removal efficiencies of NH3, TKN and TN were all above 60%. However, the removal efficiencies of turbidity and BOD were found equal to 30%. Generally, TN was removed by the process as of nitrification and denitrification, but the nitrification of the subsurface flow¡]SSF¡^part of wetland was perforated worse, which caused the org-N and NH4+-N was not availably to become the NH3, NO2- and NO3-. Because of this reason, the removal effect of Org-N was not very significant. The parameter of TOC was affected by the fixation of CO2 through photosynthesis of autotrophs, and the respiration and denitrification of heterotrophs. The sediment also could provide organic carbon source for denitrification. Photosynthesis and carbon source would cause the re-moval efficiency of TOC become worse than synthesis. In the wetland, the decrease rate of salinity was found above 20¢H.

[ES] Esta tesis tiene como objetivo el desarrollo de una metodología para la optimización de sistemas híbridos renovables que incluya mecanismos de gestión de la demanda y permita su operación tanto en modo isla, como en modo península, para su posterior validación experimental en aplicaciones dirigidas a granjas acuícolas ubicadas en la región costera central del estado de Veracruz, México. Para la consecución del objetivo, en primera instancia se elaboraron modelos de los componentes del sistema híbrido y se definió una estrategia de despacho para el sistema híbrido, los cuales fueron simulados en MATLAB y en la herramienta de ordenador HOMER. En estos modelos se incluyeron datos de los recursos renovables presentes en el sitio de estudio, la demanda eléctrica, así como también los costes de los componentes y los correspondientes a la operación, mantenimiento y combustible relacionados con la operación del sistema. Para la optimización del sistema híbrido, fueron considerados como indicadores económicos el Coste Total Anual (CTA), el Coste Neto Presente (NPC) y el Coste de Energía (COE); mientras que las emisiones de CO2, emisiones evitadas de CO2 y la Fracción Renovable (FR), fueron los indicadores medioambientales seleccionados para el caso de estudio. Posteriormente, se definieron algunos arreglos básicos y escenarios de gestión de la demanda aplicables a la operación del sistema híbrido, que permitiera evaluar los resultados de optimización y así determinar la configuración óptima, tanto en modo isla como en modo península. Finalmente, se aplicó la metodología a una granja acuícola modelo donde se consiguió definir el mejor escenario de gestión de la demanda y las posibles configuraciones de los componentes del sistema híbrido para su operación en modo isla y en modo península. Un análisis de sensibilidad desarrollado en HOMER sirvió de apoyo para evaluar el impacto de las variaciones en la demanda eléctrica de la granja y de la velocidad promedio del viento en la viabilidad técnica, económica y medioambiental del sistema híbrido óptimo. / [CAT] Aquesta tesi té com a objectiu el desenvolupament d'una metodologia per a l'optimització de sistemes híbrids renovables que incloga mecanismes de gestió de la demanda i permeta la seua operació tant en manera illa, com en manera península, per a la seua posterior validació experimental en aplicacions dirigides a granges aqüícoles situades a la regió costanera central de l'estat de Veracruz, Mèxic. Per a la consecució de l'objectiu, en primera instància es van elaborar models dels components del sistema híbrid i es va definir una estratègia de despatx per al sistema híbrid, els quals van ser simulats en MATLAB i en l'eina d'ordenador HOMER. En aquests models es van incloure dades dels recursos renovables presents en el lloc d'estudi, la demanda energètica, així com també els costos dels components i els corresponents a l'operació, manteniment i combustible relacionats amb l'operació del sistema. Per a l'optimització del sistema híbrid, van ser considerats com a indicadors econòmics el Cost Total Anual (CTA), el Cost Net Present (NPC) i el Cost d'Energia (COE); mentre que les emissions de CO2, emissions evitades de CO2 i la Fracció Renovable (FR), van ser els indicadors mediambientals seleccionats per al cas d'estudi. Posteriorment, es van definir alguns arranjaments bàsics i escenaris de gestió de la demanda aplicables a l'operació del sistema híbrid, que permetera avaluar els resultats d'optimització i així determinar la configuració òptima, tant en manera illa com en manera península. Finalment, es va aplicar la metodologia a una granja aqüícola model on es va aconseguir definir el millor escenari de gestió de la demanda i les possibles configuracions dels components del sistema híbrid per a la seua operació en manera illa i en manera península. Una anàlisi de sensibilitat desenvolupat en HOMER va servir de suport per a avaluar l'impacte de les variacions en la demanda energètica de la granja i de la velocitat faig una mitjana de del vent en la viabilitat tècnica, econòmica i mediambiental del sistema híbrid òptim. / [EN] This thesis aims to develop a methodology for the optimization of renewable hybrid systems that includes demand management mechanisms and allows its operation both in island mode, as in peninsula mode, for later experimental validation in applications aimed at aquaculture farms located in the central coastal region of the state of Veracruz, Mexico. To achieve the objective, in the first instance models of the hybrid system components were developed and a dispatch strategy for the hybrid system was defined, which were simulated in MATLAB and in the HOMER computer tool. These models included data on the renewable resources present at the study site, the electricity demand, as well as the costs of the components and those corresponding to the operation, maintenance and fuel related to the operation of the system. For the optimization of the hybrid system, the Total Annual Cost (TAC), the Net Present Cost (NPC) and the Cost of Energy (COE) were considered as economic indicators; while CO2 emissions, avoided CO2 emissions and the Renewable Fraction (RF), were the environmental indicators selected for the case study. Subsequently, some basic arrangements and demand management scenarios applicable to the operation of the hybrid system were defined, which allowed to evaluate the optimization results and thus determine the optimal configuration, both in island mode and in peninsula mode. Finally, the methodology was applied to a model aquafarm where it was possible to define the best demand management scenario and the possible configurations of the components of the hybrid system for operation in island mode and in peninsula mode. A sensitivity analysis developed at HOMER served as a support to assess the impact of variations in the farm's electrical demand and the average wind speed on the technical, economic and environmental viability of the optimal hybrid system. / Gómez González, FJ. (2020). Diseño y optimización de un sistema híbrido renovable con gestión de la demanda y aplicaciones en península y modo isla [Tesis doctoral]. Universitat Politècnica de València. https://doi.org/10.4995/Thesis/10251/158563 / TESIS