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标题：MEDIOS DE SOPORTE ALTERNATIVOS PARA LA REMOCIÓN DE FÓSFORO EN HUMEDALES ARTIFICIALES
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作者：Víctor Manuel LUNA PABELLO ; Héctor Faustino RAMÍREZ CARRILLO
期刊名称：Revista Internacional de Contaminación Ambiental
印刷版ISSN：0188-4999
出版年度：2004
卷号：20
期号：1
页码：31-38
语种：Spanish
出版社：Centro de Ciencias de la Atmósfera
摘要：The subsurface flow artificial wetlands (SFAW) are wastewater treatment systems whose design allow removal rates between 40 % and 60 % for total phosphorus. Approximately 90 % of this removal are achieved by adsorption processes on the filter media (FM) and, the remaining 10 %, through uptake by vascular plants and microorganisms. The present study focused on the evaluation of the materials CAS, PIECA and EVOL, as substitutes for conventional FM in SFAW. The experiments were carried out using four PVC columns, three packed with a different FM each and the fourth with gravel, as the reference material. The columns were fed intermittently (descendent flow) using clarified wastewater from an activated sludge plant. They were fed with about 127 mm 3 /mm 2 24 hours a day. This amount is ten times fold the one mentioned in guidelines for the operation of SFAW. The experimental water was previously sterilized and enriched with KH 2 PO 4 , in order to reduce the presence of microorganisms and to increase the phosphorus concentration up to 22 mg/L, respectively. According to the obtained results, the values of the hydraulic conductivities of the four FM were in an acceptable range (1 x 10 4m 3 /m 2 s to 1 x 10 6 3 /m 2 s) in order to correct packing of SFAW systems. During the six weeks of experimentation, two materials, CAS and PIECA achieved and maintained a high removal rate of total phosphorus (92%). For EVOL, the maximum removal rate reached was 60 %, decreasing to 48% at the end of the test. In relation to the gravel, the capacity of removal reached throughout the experimentation was 42 % and higher. The most promising alternative FM for SFAW, are CAS and PIECA which can remove up to 119 % more total phosphorus than the reference material.
其他摘要：The subsurface flow artificial wetlands (SFAW) are wastewater treatment systems whose design allow removal rates between 40 % and 60 % for total phosphorus. Approximately 90 % of this removal are achieved by adsorption processes on the filter media (FM) and, the remaining 10 %, through uptake by vascular plants and microorganisms. The present study focused on the evaluation of the materials CAS, PIECA and EVOL, as substitutes for conventional FM in SFAW. The experiments were carried out using four PVC columns, three packed with a different FM each and the fourth with gravel, as the reference material. The columns were fed intermittently (descendent flow) using clarified wastewater from an activated sludge plant. They were fed with about 127 mm 3 /mm 2 24 hours a day. This amount is ten times fold the one mentioned in guidelines for the operation of SFAW. The experimental water was previously sterilized and enriched with KH 2 PO 4 , in order to reduce the presence of microorganisms and to increase the phosphorus concentration up to 22 mg/L, respectively. According to the obtained results, the values of the hydraulic conductivities of the four FM were in an acceptable range (1 x 10 4m 3 /m 2 s to 1 x 10 6 3 /m 2 s) in order to correct packing of SFAW systems. During the six weeks of experimentation, two materials, CAS and PIECA achieved and maintained a high removal rate oftotal phosphorus (92%). For EVOL, the maximum removal rate reached was 60 %, decreasing to 48% at the end of the test. In relation to the gravel, the capacity of removal reached throughout the experimentation was 42 % and higher. The most promising alternative FM for SFAW, are CAS and PIECA which can remove up to 119 % more total phosphorus than the reference material.
关键词：artificial wetlands; phosphorus; adsorption; wastewaters;humedales artificiales; fósforo; adsorción; aguas residuales
其他关键词：artificial wetlands; phosphorus; adsorption; wastewaters