José María Quiroga Alonso
University of Cádiz
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Featured researches published by José María Quiroga Alonso.
Ozone-science & Engineering | 2016
Maria Quero-Pastor; C. Garrido-Pérez; Asunción Acevedo Merino; José María Quiroga Alonso
ABSTRACT This article presents the results of the degradation of clofibric acid by ozonation. Furthermore, results of the toxic effect of clofibric acid and its intermediate compound, 4-chlorophene generated during the oxidation process, to alga Selenastrum capricornium, are also discussed. The degradation and mineralization of the compound are studied according to the optimized operating conditions. These variables include pH, conductivity, hydraulic retention time and the use of a mixing maze. All the trials are conducted in a purpose-built pilot-scale reactor. Working under the optimal operating conditions (pH = 9, HRT = 12.5 min and ozone dose = 14 ± 2 gN/m3), a degradation value of 98% was obtained, although mineralization of the compound did not occur. Results show that clofibric acid and its intermediate are toxic during the first 10 min of treatment for concentrations equal to or greater than 1 mg/L. Under optimal conditions toxicity is not observed for any concentrations.
Desalination | 2002
Juan Antonio López-Ramírez; Diego Sales Márquez; José María Quiroga Alonso
In this paper, results and associated costs in wastewater reclamation studies carried out in an advanced experimental plant for wastewater reuse in Chiclana de la Frontera, (Cadiz, South of Spain) are showed. The plant has the most advanced technology for wastewater reclamation including a reverse osmosis (RO) unit. For these experiments cellulose acetate membranes have been selected due to its lower tendency to fouling. The secondary effluent (from an activated sludge unit) was pre-treated, prior to RO to avoid membrane fouling, with three extension levels: intense (coagulation-flocculation with ferric chloride and polyelectrolite, and high pH sedimentation), moderate (coagulation-flocculation with ferric chloride and polyelectrolite and sedimentation) and minimum (only sedimentation). In overall experiments different reagent concentrations were tested. The optimum for membrane protection, in terms of calcium, conductivity and bicarbonates reduction resulted to be the intense treatment using pH = 10.5, ferric chloride: 25 mg/L, and anionic polyelectrolite: 0.5 mg/L). Membrane performance varied with pre-treatment extension but not reclaimed water quality. The resulting permeate quality was high rendering any type of reuse application possible. Associated experimental costs together with the experimental results obtained indicate that intense pre-treatment is recommended in order to membrane protection and to guarantee the safety of wastewater reclamation process.
Ingeniería del agua | 2003
María Dolores Coello Oviedo; Diego Sales Márquez; José María Quiroga Alonso
Tecnoaqua | 2015
Manuel Enrique López Sepúlveda; Juan José Salas Rodríguez; José María Quiroga Alonso
Ingeniería civil | 2007
Y. Benhamou; José Luis García Morales; B. El Moumni; José María Quiroga Alonso; María Rocío Rodríguez Barroso
Tecno ambiente: Revista profesional de tecnología y equipamiento de ingeniería ambiental | 2000
Manuel Alejandro Manzano Quiñones; Diego Sales Márquez; José María Quiroga Alonso
Ingeniería del agua | 1998
Manuel Alejandro Manzano Quiñones; J. A. Perales Vargas-Machuca; Diego Sales Márquez; José María Quiroga Alonso
Environmental Progress | 2018
Pablo Maria Romero Pareja; Carlos Aragon Cruz; José María Quiroga Alonso; María Dolores Coello Oviedo
Tecnoaqua | 2016
Santiago Gutiérrez Ruiz; Mohammed Hassani Zerrouk; Juan Antonio López; José María Quiroga Alonso
Tecnoaqua | 2016
Santiago Gutiérrez Ruiz; Mohammed Hassani Zerrouk; José María Quiroga Alonso