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Descriptor English: Secondary Treatment
Descriptor Spanish: Tratamiento Secundario
Descriptor tratamiento secundario
Scope note: Busca la remoción de la materia orgánica, quizás de microorganismos y nutrientes como nitrógeno y fósforo, con predominio de los mecanismos biológicos en esos procesos. Se obtiene una sustancial reducción en la materia orgánica en suspensión fina, que no fue removida en el tratamiento primario, y en la materia orgánica en forma de sólidos no sedimentables, disueltos (DBO soluble). Puede conseguirse en ese nivel de tratamiento los porcentajes de remoción del 60 al 99 por ciento en la DBO y en los coliformes, y del 10 al 50 por ciento en los nutrientes. Los procesos de tratamiento biológicos naturales aplicados en esa etapa, constituidos por una sola unidad de tratamiento que produce efluente de calidad satisfactoria para el lanzamiento final, son las lagunas facultativas y las lagunas aireadas facultativas. Son numerosos los sistemas de tratamientos biológicos, en esa etapa, formados por el arreglo de unidades de tratamiento, pero la remoción de los contaminantes es más eficiente si se obtiene colocando una unidad de tratamiento aerobio como postratamiento de una unidad anaerobia. (Traducción libre del original: Brasil. FUNASA, 2018)
Descriptor Portuguese: Tratamento Secundário
Descriptor French: Traitement Secondaire
Tree number(s): SP4.895.141.712.928
Scope note: It objectives mainly the organic matter removal, possibly microorganisms and nutrients such as nitrogen and phosphorus, with a predominance of biological mechanisms in these processes. Substantial reduction in organic matter in fine suspension is achieved, which was not removed in the primary treatment, and organic matter in the form of solids not liable to sedimentation, dissolved (BOD soluble). A removal percentage of 60 to 99 percent in BOD and coliforms, and 10 to 50 percent of the nutrients can be achieved. The natural biological treatment processes applied at this stage, consisting of a single treatment unit that produces satisfactory quality effluent for the final release, are facultative lagoons and optional aerated lagoons. In this stage there are numerous biological treatment systems, formed by the treatment unit layouts; and the highest efficiencies in the pollutants removal are obtained by placing an aerobic treatment unit as a posttreatment anaerobic unit. (Free translation from the original: Brasil. FUNASA, 2018)
Allowable Qualifiers: No qualifiers
Related: Aeration DeCS
Anaerobic Contact Process DeCS
Oxidation Ditches DeCS
Secondary Sedimentation DeCS
DeCS ID: 25582
Unique ID: DDCS025582
Documents indexed in the Virtual Health Library (VHL): Click here to access the VHL documents
Secondary Treatment - Preferred
Concept UI FD00058440
Scope note It objectives mainly the organic matter removal, possibly microorganisms and nutrients such as nitrogen and phosphorus, with a predominance of biological mechanisms in these processes. Substantial reduction in organic matter in fine suspension is achieved, which was not removed in the primary treatment, and organic matter in the form of solids not liable to sedimentation, dissolved (BOD soluble). A removal percentage of 60 to 99 percent in BOD and coliforms, and 10 to 50 percent of the nutrients can be achieved. The natural biological treatment processes applied at this stage, consisting of a single treatment unit that produces satisfactory quality effluent for the final release, are facultative lagoons and optional aerated lagoons. In this stage there are numerous biological treatment systems, formed by the treatment unit layouts; and the highest efficiencies in the pollutants removal are obtained by placing an aerobic treatment unit as a posttreatment anaerobic unit. (Free translation from the original: Brasil. FUNASA, 2018)
Preferred term Secondary Treatment



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