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TitleOptimizing lab-scale wastewater treatment reactors operation for enhanced assays
Author(s)Padrão, Jorge
Ferreira, V.
Duarte, Maria Salomé
Alves, M. M.
Mota, M.
Nicolau, Ana
Issue date6-Jul-2017
CitationPadrão, Jorge; Ferreira, V.; Duarte, Maria Salomé; Alves, M. Madalena; Mota, Manuel; Nicolau, Ana, Optimizing lab-scale wastewater treatment reactors operation for enhanced assays. Book of Abstracts of CEB Annual Meeting 2017. Braga, 6 July, 75, 2017. ISBN: 978-989-97478-8-3
Abstract(s)[Excerpt] Wastewater treatment plants (WWTP) comprise a complex set of sequenced operations that ensure the safe discharge of water, previously contaminated by anthropogenic activities, into the environment. Roughly, these operations are divided in: preliminary treatment, primary treatment and secondary treatment. The secondary treatment is the most critical operation, encompassing a feeble equilibrium between physicochemical conditions and biological processes. It commonly consists in an aeration tank and a clarifier [1]. The microbial community present in the aeration tank is responsible for metabolizing most of the influent nutrient load. Pure oxygen, or air, is injected in this process to guarantee an adequate concentration of dissolved oxygen, in order to promote a rapid aerobic metabolism. Simultaneously preventing anoxic conditions, which denote a slower nutrient consumption and the generation of foul substances. Worldwide, the most commonly used microbial community for this process in the WWTP is activated sludge. Consisting of a highly complex community comprising bacteria, fungi, small protozoa and protozoa, the activated sludge “healthiness” is a critical factor for the efficiency of the wastewater treatment process. In addition, “healthy” activated sludge also possess a key physicochemical property for the downstream process of the aeration tank, namely, flocculation. In the clarifier the activated sludge flocs will sediment by the sole action of gravity, thus preventing a high microbial load in the effluent [2]. [...]
DescriptionBook of Abstracts of CEB Annual Meeting 2017
Publisher version
AccessOpen access
Appears in Collections:CEB - Resumos em Livros de Atas / Abstracts in Proceedings

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