24 documents found, page 1 of 3
Unravelling microbiome changes in aerobic granular sludge saline wastewater tre...
Paulo, Ana M. S.; Salazar, Oihane; Costa, Joana; Mesquita, Daniela P.; Ferreira, Eugénio C.; Castro, Paula M. L.; Amorim, Catarina L.Saline wastewaters mainly result from various industrial activities. In response to water shortage, seawater is increasingly utilized for diverse purposes, leading to an increased production of saline wastewater. The presence of salts in wastewater frequently impairs the efficiency of biological wastewater treatment technologies. Among these, aerobic granular sludge (AGS) has emerged as the most effective aerob...
Quantitative image analysis for assessing extracellular polymeric substances in...
Melo, Antonio; Costa, Joana Sofia Gomes; Quintelas, Cristina Maria Catalão; Amaral, António Luís; Ferreira, Eugénio C.; Mesquita, Daniela P.Extracellular polymeric substances (EPS) play a vital role in biological wastewater treatment systems. This study investigates the impact of herbicide atrazine (ATZ) on the overall performance, EPS yield, composition, and sludge morphology in an activated sludge (AS) system operated in a sequencing batch reactor (SBR). Since conventional methods for analyzing EPS are time-consuming and releases residues, a new ...
Fate and occurrence of microplastics in wastewater treatment plants
Mesquita, Daniela P.; Quintelas, Cristina Maria Catalão; Ferreira, Eugénio C.Microplastics (MP) are commonly present in our daily life. Reported studies on MP pollution revealed that wastewater treatment plants (WWTPs) serve as pathways for MP to enter terrestrial and aquatic ecosystems, causing adverse effects on the quality of water bodies, aquatic life, and even contamination of soil and groundwater. In WWTPs, variable MP removal efficiencies from liquid streams have been reported. H...
Exploring the correlations between epi indicators of COVID-19 and the concentra...
Silva, Ana R.; Mesquita, Daniela P.; Salomé Duarte, M.; Lado Ribeiro, Ana R.; Pereira, M.Fernando R.; Madalena Alves, M.; Monteiro, SílviaThe COVID-19 pandemic caused by the SARS-CoV-2 virus led to changes in the lifestyle and human behaviour, which resulted in different consumption patterns of some classes of pharmaceuticals including curative, symptom-relieving, and psychotropic drugs. The trends in the consumption of these compounds are related to their concentrations in wastewater systems, since incompletely metabolised drugs (or their metabo...
Negative impacts of cleaning agent DEPTAL MCL® on activated sludge wastewater t...
Padrão, Jorge; Ferreira, Vânia; Mesquita, Daniela P.; Cortez, Susana Maria Ribeiro; Dias, Nicolina Marques; Duarte, Maria Salomé Lira; Tortella, GonzaloDEPTAL 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 sl...
Treatment of saline wastewater amended with endocrine disruptors by aerobic gra...
Ely, Cyntia; Moreira, Irina S.; Bassin, João Paulo; Dezotti, Márcia W. C.; Mesquita, Daniela P.; Costa, Joana; Ferreira, Eugénio C.; Castro, Paula M. L.An aerobic granular sludge (AGS) sequencing batch reactor (SBR) adapted to salinity (12 g L−1 NaCl) was operated under alternating anaerobic-aerobic conditions for the treatment of synthetic saline wastewater containing endocrine-disrupting chemicals (EDCs), namely 17β–estradiol (E2), 17α–ethinylestradiol (EE2) and bisphenol-A (BPA). The SBR was intermittently fed with the EDCs at 2 mg L−1 of each compound. E2 ...
Quantitative image analysis as a robust tool to assess effluent quality from an...
Costa, Joana G.; Paulo, Ana M. S.; Amorim, Catarina L.; Amaral, A. Luís; Castro, Paula M. L.; Ferreira, Eugénio C.; Mesquita, Daniela P.Quantitative image analysis (QIA) is a simple and automated method for process monitoring, complementary to chemical analysis, that when coupled to mathematical modelling allows associating changes in the biomass to several operational parameters. The majority of the research regarding the use of QIA has been carried out using synthetic wastewater and applied to activated sludge systems, while there is still a ...
Long-term stability of a non-adapted aerobic granular sludge process treating f...
Paulo, Ana M. S.; Amorim, Catarina L.; Costa, Joana; Mesquita, Daniela P.; Ferreira, Eugénio C.; Castro, Paula M. L.The tolerance of aerobic granular sludge (AGS) to variable wastewater composition is perceived as one of its greatest advantages compared to other aerobic processes. However, research studies select optimal operational conditions for evaluating AGS performance, such as the use of pre-adapted biomass and the control of wastewater composition. In this study, non-adapted granular sludge was used to treat fish cann...
Increased extracellular polymeric substances production contributes for the rob...
Oliveira, Ana S.; Amorim, Catarina L.; Mesquita, Daniela P.; Ferreira, Eugénio C.; Loosdrecht, Mark van; Castro, Paula M. L.Industrial effluents often contain organic pollutants and variable salinity levels, making their treatment challenging. The high content of extracellular polymeric substances (EPS) in the aerobic granular sludge (AGS) is thought to protect the microbial communities from stressful conditions. Ammonium and phosphate removal, EPS production, and granular morphology were assessed in a lab-scale AGS reactor operated...
High carbon load in food processing industrial wastewater is a driver for metab...
Paulo, Ana M. S.; Amorim, Catarina L.; Costa, Joana; Mesquita, Daniela P.; Ferreira, Eugénio C.; Castro, Paula M. L.Aerobic granular sludge (AGS) processes are among the most robust wastewater treatments. One of their greatest advantages is related to the granules multi-layered structure, which creates a protective barrier against organic shock loads and variable wastewater composition, particularly attractive for the treatment of industrial wastewater. However, when treating a wastewater with variable and complex compositio...