Presence of bacteria and bacteriophages in full-scale trickling filters and an aerated constructed wetland

Stefanakis, Alexandros I.; Bardiau, Marjorie; Trajano, D; Couceiro, Fay; Williams, J.; Taylor, Huw

doi:10.1016/j.scitotenv.2018.12.415

Cited by 59 publications

(28 citation statements)

References 67 publications

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“…Little is known about the specific contribution per unit on the removal efficiency. However, not strong contribution of FIOs removal was observed after a pre-treatment stage being an underground septic tank (Purnell et al., 2016) and a primary sedimentation tank (Stefanakis et al., 2019). Therefore, the sand filtration unit must have increased the FIOs removal rates in case of Ottoson et al.…”

Section: Discussionmentioning

confidence: 98%

“…This improvement has resulted in energy savings (20–50%) while compared to CAS systems (Pronk et al., 2017) and other technologies such as membrane bioreactors (Purnell et al., 2016). Moreover, less area is required compared to CAS systems or other technologies such as trickling filters and constructed wetlands (Stefanakis et al., 2019). Those processes normally include primary treatment and in the case of CAS a secondary sedimentation tank after the biological treatment to separate sludge from the liquid bulk.…”

Section: Discussionmentioning

confidence: 99%

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Removal of bacterial and viral indicator organisms in full-scale aerobic granular sludge and conventional activated sludge systems

et al. 2020

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The aim of this study was to evaluate the effectiveness of the novel aerobic granular sludge (AGS) wastewater treatment technology in removing faecal indicator organisms (FIOs) compared to the conventional activated sludge (CAS) treatment system. The work was carried out at two full-scale wastewater treatment plants (WWTP) in the Netherlands, Vroomshoop and Garmerwolde. Both treatment plants have a CAS and AGS system operated in parallel. The parallel treatment lines are provided with the same influent wastewater. The concentrations of the measured FIOs in the influent of the two WWTPs were comparable with reported literature values as follows: F-specific RNA bacteriophages at 106 PFU/100 mL, and Escherichia coli (E. coli), Enterococci, and Thermotolerant coliforms (TtC) at 105 to 106 CFU/100 mL. Although both systems (CAS and AGS) are different in terms of design, operation, and microbial community, both systems showed similar FIOs removal efficiency. At the Vroomshoop WWTP, Log10 removals for F-specific RNA bacteriophages of 1.4 ± 0.5 and 1.3 ± 0.6 were obtained for the AGS and CAS systems, while at the Garmerwolde WWTP, Log10 removals for F-specific RNA bacteriophages of 1.9 ± 0.7 and 2.1 ± 0.7 were found for the AGS and CAS systems. Correspondingly, E. coli, Enterococci, and TtC Log10 removals of 1.7 ± 0.7 and 1.1 ± 0.7 were achieved for the AGS and CAS systems at Vroomshoop WWTP. For Garmerwolde WWTP Log10 removals of 2.3 ± 0.8 and 1.9 ± 0.7 for the AGS and CAS systems were found, respectively. The measured difference in removal rates between the plants was not significant. Physicochemical water quality parameters, such as the concentrations of organic matter, nutrients, and total suspended solids (TSS) were also determined. Overall, it was not possible to establish a direct correlation between the physicochemical parameters and the removal of FIOs for any of the treatment systems (CAS and AGS). Only the removal of TSS could be positively correlated to the E. coli removal for the AGS technology at the evaluated WWTPs.

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Section: Discussionmentioning

confidence: 98%

Section: Discussionmentioning

confidence: 99%

Removal of bacterial and viral indicator organisms in full-scale aerobic granular sludge and conventional activated sludge systems

et al. 2020

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“…HF aerated wetlands for secondary treatment of domestic wastewater are capable of approximately four log unit removal of E. coli [71]. Stefanakis et al [75] studied the use of an aerated wetland for tertiary treatment, reporting final effluent concentrations for E. coli, Fecal Coliform, and Intestinal Enterococci of 41, 14, and 3 CFU/100 mL, which are all below the WHO guidelines for reuse of treated water in agriculture [76].…”

Section: Research Trendsmentioning

confidence: 99%

“…Pathogen removal processes in aerated wetland systems. Stefanakis et al [75] report the first assessment of bacteriophages in aerated wetlands, and attribute the correlation of bacteria and bacteriophages in the effluent to the role of phages as bacterial predators. What are the primary mechanisms of pathogen removal in aerated wetlands?…”

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confidence: 99%

Recent Advances in the Application, Design, and Operations & Maintenance of Aerated Treatment Wetlands

Nivala

Murphy²,

Freeman³

2020

Water

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This paper outlines recent advances in the design, application, and operations and maintenance (O&M) of aerated treatment wetland systems as well as current research trends. We provide the first-ever comprehensive estimate of the number and geographical distribution of aerated treatment wetlands worldwide and review new developments in aerated wetland design and application. This paper also presents and discusses first-hand experiences and challenges with the O&M of full-scale aerated treatment wetland systems, which is an important aspect that is currently not well reported in the literature. Knowledge gaps and suggestions for future research on aerated treatment wetlands are provided.

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“…Full-scale CWs have the advantage of providing real world results in comparison to implementation at micro or meso scales ( Brisson and Chazarenc, 2009 ) and several studies have demonstrated full-scale CWs can achieve more than 60% removal efficiency ( Sim et al., 2008 ; Vystavna et al., 2017 ; Ali et al., 2018 ). However, full-scale CW experiments infrequently use replication due to its cost ( Brisson and Chazarenc, 2009 ; Stefanakis et al., 2019 ).…”

Section: Introductionmentioning

confidence: 99%

Implementation of a full-scale constructed wetland to treat greywater from tourism in Suluban Uluwatu Beach, Bali, Indonesia

Perdana¹,

Hadisusanto

Purnama

2020

Heliyon

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This original research examines a full-scale subsurface Constructed Wetland (CW) system in Indonesia, where most CW research has been limited to laboratory scale experiments. The CW system was located in Bali and built in 2015 in a single series formation. This study aims to demonstrate the performance of the system in treating greywater and examine the nutrient content plants’ above-ground biomass. The CW was arranged in linear sequence composed of one unplanted (CW1) and five planted treatments of Iris pseudacorus (CW2), Caladium bicolor (CW3) , Rhoe discolor (CW4) , Sansevieria trifasciata (CW5) and Heliconia psittacorum (CW6). There has been little research on Caladium bicolor, Rhoe discolor and Sansevieria trifasciata in a full-scale CW application. Our results showed fluctuating efficiency (%) in the reduction of Biological Oxygen Demand (BOD), Chemical Oxygen Demand (COD), Total Suspended Solid (TSS), Oil and Grease (O&G), Nitrate and Phosphate. The highest removal efficiency for CW1, CW2, CW3, CW4, CW5, CW6 were O&G (63.63%), BOD (90.66%), Nitrate (83.55%), BOD (80%), BOD (82.88%) and Phosphate (89.93%) respectively. After the experimental period, S. trifasciata and H. psittacorum experienced a decrease in Total N concentration, while H. psittacorum experienced a decrease in phosphate in above-ground biomass. Species of R. discolor, C. bicolor and I. pseudacorus showed good performance in terms of their growth and development. Although high removal efficiency was observed at certain times, this study showed the negative removal efficiencies at times among parameters as a consequence of the low Hydraulic Retention Time (HRT) and high Hydraulic Loading Rate (HLR).

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Presence of bacteria and bacteriophages in full-scale trickling filters and an aerated constructed wetland

Abstract: Presence of bacteria and bacteriophages in full-scale trickling filters and an aerated constructed wetland. Stoten (2018),

Cited by 59 publications

References 67 publications

Removal of bacterial and viral indicator organisms in full-scale aerobic granular sludge and conventional activated sludge systems

Removal of bacterial and viral indicator organisms in full-scale aerobic granular sludge and conventional activated sludge systems

Recent Advances in the Application, Design, and Operations & Maintenance of Aerated Treatment Wetlands

Implementation of a full-scale constructed wetland to treat greywater from tourism in Suluban Uluwatu Beach, Bali, Indonesia

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