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Título: Improvement of coagulation-flocculation process using anionic polyacrylamide as coagulant aid.
Fecha de publicación: 2005
Editorial: Elsevier
ISSN: 0045-6535
Materias relacionadas: 62 - Ingeniería. Tecnología
Palabras clave: Coagulation
Flocculation
Slaughterhouse wastewater
Anionic polyacrylamide
Settling time
Resumen: A physicochemical treatment (coagulation-flocculation) was applied to a slaughterhouse wastewater, using anionic polyacrylamide as coagulant aid to improve the settling velocity of the flocs formed with the coagulants used: ferric sulphate, aluminium sulphate and polyaluminium chloride. The optimum speed and stirring time for the flocculation stage were ascertained along with the optimum pH and coagulant and coagulant aid doses. The speed and coagulation time were initially set according to recommendations in the literature concerning the treatment of this type of water. Chemical Oxygen Demand (COD), Biochemical Oxygen Demand at five days (BOD5) and Total Suspended Solids (TSS) were recorded at the beginning and end of each experiment in order to monitor the process. Once the optimal conditions had been established, several parameters were measured in order to assess the coagulation-flocculation process: particle number and size, sludge volume, nutrients (ammonia nitrogen, total Kjeldahl nitrogen, albuminoid nitrogen, orthophosphate, total phosphorus) and the residual concentration of iron and aluminium in clarified water. Anionic polyacrylamide, when added with ferric sulphate or polyaluminium chloride led to a significant increase in the settling speed.
Autor/es principal/es: Aguilar, Mª Isabel
Sáez, José
Lloréns, Mercedes
Soler, Antonio
Ortuño, Juan F.
Meseguer, Víctor F.
Fuentes, Ana
Facultad/Departamentos/Servicios: Ingeniería Química
Publicado en: Chemosphere 58,1, 47-56, 2005
Versión del editor: doi:10.1016/j.chemosphere.2004.09.008
URI: http://hdl.handle.net/10201/49801
Tipo de documento: info:eu-repo/semantics/article
Número páginas / Extensión: 30
Derechos: info:eu-repo/semantics/openAccess
Aparece en las colecciones:Artículos: Ingeniería Química

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