Tesis doctoral de Maha Abdelhameed Abdelazeem Abdelhameed Elbana
Microirrigation is considered as an appropriate method for reclaimed wastewater reuse because it diminishes the health risks. However, the most important problem when applying reclaimed effluents in microirrigation systems is emitter and filter clogging, which lead to low system distribution uniformity. The main target of this phd dissertation is to compare the performance of a surface (di) and a subsurface (sdi) drip irrigation systems when applying a tertiary treated effluent under three flushing frequency (no flushing, seasonal flushing and monthly flushing) using two emitter types (pressure and non-pressure compensating). In addition, the study aimed to investigate the influence of effluent quality on the sand filtration process. Another purpose was to compute head loss across the sand media filter and time between backwashing in a sand filter media through dimensional analysis. the results revealed that sand filtration cycle duration depended mainly on the applied effluent quality and sand filter effective diameter. It was also found that the effectiveness of filtration process was significantly due to sand effective diameter, being the smaller the effective diameter the more effective the filtration process. The dimensional analysis helped to develop a mathematical model to calculate head loss across sand filter with a high adjusted coefficient of determination and a good distribution of residuals. Besides, it was found that lateral flow rates depended significantly on emitter type, irrigation system, irrigation season and flushing frequency. In di system, lateral flow of the non-pressure compensating emitter was significantly increased throughout the experimental time due to emitter failure and significantly decreased in sdi one due to the elevated percentage of clogged emitters. The pressure compensating emitter lateral flow was increased during the experiment for di and sdi systems. The study, as well, showed that emitter clogging in di system was primarily due to biological factors and in the sdi one was due to a combination of biological and physical factors. However, it was found that the seasonal flushing frequency was the best management practice for achieving the highest system distribution uniformity after 1620 h of irrigation for both di and sdi systems. url: http://hdl.Handle.Net/10803/51585
Datos académicos de la tesis doctoral «Comparison between surface and subsurface drip irrigation systems using effluents«
- Título de la tesis: Comparison between surface and subsurface drip irrigation systems using effluents
- Autor: Maha Abdelhameed Abdelazeem Abdelhameed Elbana
- Universidad: Lleida
- Fecha de lectura de la tesis: 28/07/2011
Dirección y tribunal
- Director de la tesis
- Jaume Puig Bargues
- Tribunal
- Presidente del tribunal: Alberto Losada villasante
- José (secretario) Roldán cañas (vocal)
- Miguel Llorca marqués (vocal)
- rosa María Chica moreno (vocal)