Exploring the influence of meteorological conditions on the performance of a waste stabilization pond at high altitude with structural equation modeling
Algal photosynthesis plays a key role in the removal mechanisms of waste stabilization ponds (WSPs), which is indicated in the variations of three parameters, dissolved oxygen, pH, and chlorophyll a. These variations can be considerably affected by extreme climatic conditions at high altitude. To in...
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| Autores Principales: | , , |
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| Formato: | info:eu-repo/semantics/ARTÍCULO |
| Publicado: |
2019
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| Materias: | |
| Acceso en línea: | http://dspace.ucuenca.edu.ec/handle/123456789/31829 https://iwaponline.com/wst/article-abstract/78/1/37/39361/Exploring-the-influence-of-meteorological?redirectedFrom=fulltext |
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| Sumario: | Algal photosynthesis plays a key role in the removal mechanisms of waste stabilization ponds
(WSPs), which is indicated in the variations of three parameters, dissolved oxygen, pH, and
chlorophyll a. These variations can be considerably affected by extreme climatic conditions at high
altitude. To investigate these effects, three sampling campaigns were conducted in a high-altitude
WSP in Cuenca (Ecuador). From the collected data, the first application of structure equation
modeling (SEM) on a pond system was fitted to analyze the influence of high-altitude characteristics
on pond performance, especially on the three indicators. Noticeably, air temperature appeared as
the highest influencing factors as low temperature at high altitude can greatly decrease the growth
rate of microorganisms. Strong wind and large diurnal variations of temperature, 7–20 C, enhanced
flow efficiency by improving mixing inside the ponds. Intense solar radiation brought both
advantages and disadvantages as it boosted oxygen level during the day but promoted algal
overgrowth causing oxygen depletion during the night. From these findings, the authors proposed
insightful recommendations for future design, monitoring, and operation of high-altitude WSPs.
Moreover, we also recommended SEM to pond engineers as an effective tool for better simulation of
such complex system like WSPs. |
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