Technical Note 5 - High-rate algal ponds as viable option for the sewage treatment in Brazilian context

Author:

Rosa-Machado Alcino Trindade1,Vassalle Lucas2,Torres-Franco Andrés Felipe3,Santos Maria de Lourdes Florêncio dos4,Mota Cesar Rossas5

Affiliation:

1. Centro Universitário de Belo Horizonte, Brazil

2. Universidade Federal de Minas Gerais, Brazil

3. Universidade del Valle, Colômbia

4. Universidade Federal de Pernambuco, Brazil

5. Universidade Federal do Ceará, Brazil

Abstract

The wide use of anaerobic sludge blanket reactors in Brazil contributes to reducing the deficit in wastewater treatment in the country. However, these reactors do not efficiently remove nutrients and pathogens, being often necessary to use a post-treatment step to comply with current legislations. High-rate algal ponds (HRAP) have emerged as a sustainable option for post-treatment of UASB effluents, as they combine the removal of residual organic matter and other compounds with the production of algal biomass, at low operating costs when compared to other technologies. Algal biomass can be used to produce bioproducts, such as biogas, animal feed and fertilizers. HRAP also remove pathogens, producing effluent suitable for reuse, in addition to requiring less area, when compared to conventional stabilization pond systems. Thus, this technical note addresses the main aspects for the design of HRAP for the treatment of and resource recovery from sewage.

Publisher

Zeppelini Editorial e Comunicacao

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