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https://hdl.handle.net/1822/77804
Título: | Negative impacts of cleaning agent DEPTAL MCL® on activated sludge wastewater treatment system |
Autor(es): | Padrão, Jorge Ferreira, Vânia Mesquita, Daniela P. Cortez, Susana Maria Ribeiro Dias, Nicolina Marques Duarte, Maria Salomé Lira Tortella, Gonzalo Fernandes, Isabel Mota, M. Nicolau, Ana |
Palavras-chave: | Activated sludge DEPTAL MCL® Microbial communities Wastewater treatment performance Agro-food cleaning agent DEPTAL MCL (R) |
Data: | 10-Set-2022 |
Editora: | Elsevier 1 |
Revista: | Science of the Total Environment |
Citação: | Padrão, Jorge; Ferreira, V.; Mesquita, Daniela P.; Cortez, Susana; Dias, Nicolina M.; Duarte, Maria Salomé; Tortella, Gonzalo; Fernandes, Isabel; Mota, Manuel; Nicolau, Ana, Negative impacts of cleaning agent DEPTAL MCL® on activated sludge wastewater treatment system. Science of the Total Environment, 838, Part 1(155957), 2022 |
Resumo(s): | DEPTAL MCL® is a professional cleaning agent approved by the Portuguese Food Regulatory Authority and is used in agro-food industries, namely in fish canning industries in the north of Portugal. Its extensive use during cleaning procedures results in potential significant negative impacts on the performance of the downstream municipal wastewater treatment plant (WWTP). A lab-scale extended areation activated sludge wastewater treatment system, continuously fed by influent collected at a municipal WWTP, was used to assess the impact of a range of DEPTAL MCL® concentrations during 72h. Despite distinct activated sludge community composition (due to its dynamic nature) and variations in real influent characteristics, a relevant impact was observed. DEPTAL MCL® effect was underscored through the use of a multivariate analysis using seventeen physicochemical operational factors and nineteen quantitative image analysis (QIA) parameters. DEPTAL MCL® exerted a severe negative impact on phosphorous (P-PO4) removal, total nitrogen (TN) removal and sludge volume index (SVI). With increasing DEPTAL MCL® concentrations, both P-PO4 and TN removal were affected and diminished proportionally. Moreover, several QIA parameters indicate defloculation when DEPTAL MCL® was present, in particular for intermediate size aggregates with significant impacts. Optical density of the effluent (Ode), displayed an increase of effluent turbidity. Percentage of area covered by small aggregates (%Areasml) was also significantly higher for the intermediate and higher DEPTAL MCL® concentrations tested. Principal component analysis exhibited 3 distinct ordenations: (i) control without addition of DEPTAL MCL®; (ii) addition of 0.03% and 0.06% and of (iii) 0.13 and 0.26% (v DEPTAL MCL®/v aeration tank). Canonical correspondence analysis (CCA) was used to correlate the physicochemical data, QIA and the filamentous bacteria species prevalence to DEPTAL MCL® concentration and incubation time. A time persistent DEPTAL MCL® effect was observed, underscoring the need of a pretreatment of wastewater containing this cleaning agent. |
Tipo: | Artigo |
URI: | https://hdl.handle.net/1822/77804 |
DOI: | 10.1016/j.scitotenv.2022.155957 |
ISSN: | 0048-9697 |
e-ISSN: | 1879-1026 |
Versão da editora: | https://www.journals.elsevier.com/science-of-the-total-environment/ |
Arbitragem científica: | yes |
Acesso: | Acesso restrito UMinho |
Aparece nas coleções: | CEB - Publicações em Revistas/Séries Internacionais / Publications in International Journals/Series |
Ficheiros deste registo:
Ficheiro | Descrição | Tamanho | Formato | |
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document_55548_1.pdf Acesso restrito! | 1,43 MB | Adobe PDF | Ver/Abrir |