Effluent quality and reuse potential of wastewater treated in constructed wetlands in Southern Brazil

Author:

Sousa Arielle da Rosa1,Pelissari Catiane2,Laureano Andreza Thiesen3ORCID,Sezerino Pablo Heleno1ORCID

Affiliation:

1. a Decentralized Sanitation Research Group, GESAD, Federal University of Santa Catarina, UFSC, Florianópolis, SC, Brazil

2. b University of the West of Santa Catarina, UNOESC, Videira, SC, Brazil

3. c Federal Institute of Santa Catarina, IFSC, Florianópolis, SC, Brazil

Abstract

ABSTRACT The main objective of this study was to evaluate the quality and reuse potential of treated effluents by constructed wetlands (CW) systems utilized for decentralized wastewater treatment in urban and rural scenarios in southern Brazil. The assessment, based on Brazilian discharge standards and wastewater reuse guidelines, revealed a close link between treatment efficiency and technological configurations, considering diverse inlet wastewater sources. Most CW treated effluents complied with regulatory standards for disposal, prompting the exploration of reuse scenarios in urban and agricultural settings. However, the study underscores the imperative for rigorous disinfection due to the limited microbiological removal capacity of CW. Overall, the research emphasizes the adaptability and resilience of CW in treating diverse wastewater compositions, highlighting their pivotal role in advancing circular economy principles within sanitation services. Importantly, the findings suggest significant potential for treated wastewater reuse in both urban and agricultural settings. Urban applications, including toilet flushing, floor washing, and garden irrigation, prove feasible for CW systems situated in residential and commercial buildings. Meanwhile, rural CW systems demonstrate suitability for reclaimed water directed toward crop fertigation, tailored to the specific needs and irrigation methods of various crops.

Funder

Coordenação de Aperfeiçoamento de Pessoal de Nível Superior

Fundação de Amparo à Pesquisa e Inovação do Estado de Santa Catarina

Publisher

IWA Publishing

Reference33 articles.

1. Municipal wastewater treatment using vertical flow constructed wetlands planted with Canna, Phragmites and Cyprus

2. Associação Brasileira de Normas Técnicas - ABNT 1997 NBR 13969: Tanques sépticos – Unidades de tratamento complementar e disposição final dos efluentes líquidos: Projeto, construção e operação (Septic tanks – Units for complementary treatment and final disposal of liquid effluents: Design, construction and operation). Rio de Janeiro (in Portuguese).

3. Associação Brasileira de Normas Técnicas - ABNT 2019 NBR 16783: Uso de fontes alternativas não potáveis em edificações (Use of alternative non-potable sources in buildings). Rio de Janeiro, (in Portuguese).

4. Feeding mode influence on treatment performance of unsaturated and partially saturated vertical flow constructed wetland

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