Characterization of clogging material from horizontal subsurface flow constructed wetland systems

• Autor(a) principal: Miranda, Suymara T.
• Data de Publicação: 2017
• Outros Autores: Borges, Alisson C., Baptestin, Gheila C. F., Matos, Antonio T., Matos, Mateus P.
• Tipo de documento: Artigo
• Idioma: eng
• Título da fonte: LOCUS Repositório Institucional da UFV
• Texto Completo: http://dx.doi.org/10.1590/1809-4430-eng.agric.v37n3p463-470/2017; http://www.locus.ufv.br/handle/123456789/24943
• topic: Constructed wetlands; Clogging; Porous medium

This study aimed to characterize the material composition responsible for clogging the porous medium of horizontal subsurface flow constructed wetland (HSSF–CW) systems, which is detrimental to a proper system operation. Six completely clogged HSSF–CWs were used after treatment of swine wastewater. Operating conditions of these systems were named CW–C (HSSF– CW 1 and HSSF–CW 4, non-cultivated, i.e. controls), CW–T (HSSF–CW 2 and HSSF–CW 5, cultivated with Tifton 85 (Cynodon spp.)), and CW–A (HSSF–CW 3 and HSSF–CW 6, cultivated with alligator weed (Alternanthera philoxeroides)). The results showed that most of the clogging material was composed of total fixed solids (95, 84, and 82% in CW–C, CW–T, and CW–A, respectively). However, total volatile solids (TVS) mostly affected pore clogging. The larger accumulations and productions of TVS in CWs might have originated from dead plants.