Biofilm Reactors: A Compact Solution for the Upgrading of Waste Water Treatment Plants

Sagberg, P.; Dauthuille, P.; Hamon, M.

doi:10.2166/wst.1992.0454

Cited by 18 publications

(4 citation statements)

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“…High transformation of organic matter and NH 3 (with a positive correlation to HRT) indicates an active heterotrophic and autotrophic bacteria community and is consistent with other BAF studies (e.g. Chen et al, 2011; Sagberg et al, 1992). For example, found COD removal from wastewater in a pilot BAF system (using plastic balls media) to be 68% and 80%, at HRTs 2 h and > 4 h respectively.…”

Section: Resultssupporting

confidence: 90%

Integrative Advanced Oxidation and Biofiltration for Treating Pharmaceuticals in Wastewater

Lester

Aga

Love

et al. 2016

Water Environment Research

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Advanced oxidation of active pharmaceutical ingredients (APIs) in wastewater produces transformation products (TPs) that are often more biodegradable than the parent compounds. Secondary effluent from a wastewater treatment plant was treated using UV-based advanced oxidation (LPUV/H2O2 and MPUV/NO3) followed by biological aerated filtration (BAF), and different APIs and their transformation products were monitored. The advanced oxidation processes degraded the APIs by 55-87% (LPUV/H2O2) and 58-95% (MPUV/NO3), while minor loss of APIs was achieved in the downstream BAF system. Eleven TPs were detected following oxidation of carbamazepine (5) and iopromide (6); three key TPs were biodegraded in the BAF system. The other TPs remained relatively constant in the BAF. The decrease in UV absorbance (UVA254) of the effluent in the BAF system was linearly correlated to the degradation of the APIs (for the MPUV/NO3-BAF), and can be applied to monitor the biotransformation of APIs in biological-based systems.

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Section: Resultssupporting

confidence: 90%

Integrative Advanced Oxidation and Biofiltration for Treating Pharmaceuticals in Wastewater

Lester

Aga

Love

et al. 2016

Water Environment Research

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“…which shows a linear variation of eliminated ammonium load with the applied ammonium load. Similar tendency was observed in literature for full-scale sewage treatment plants [2,13,14].…”

Section: Methodssupporting

confidence: 91%

Studies in nitrification of municipal sewage in an upflow biofilter

Chandravathanam

Murthy

1999

Bioprocess Engineering

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The up¯ow aerated bio®lter with polyurethane foam cubes as the supporting medium was used for the investigation of nitri®cation studies on municipal sewage (secondary treated as well as untreated domestic sewage). In case of secondary treated sewage ef¯uent, a synthetic composition of NH 4 -N and COD of each 50 mg/l was studied for a HRT variation of 24, 12, 8 and 6 hours. The ammonium removal ef®ciencies were found to be in the range of 98 to 100% with the steady-state ef¯uent concentrations of NH 4 -N and NO À 2 -N in the range of 1±4 mg/l and 0.1±0.2 mg/l respectively. In case of domestic sewage system, nitri®cation studies along with suspended solids removal study was carried-out on untreated sewage for a HRT variation of 24, 12 and 6 hours. The ammonium removal ef®ciencies of 100% were observed for all the three HRT values at very high COD/NH 4 -N ratio of 15. The suspended solids removal ef®ciencies of 95 to 98% were observed with the average ef¯uent suspended solids concentration of 5.9 to 15.9 mg/l. The experiments were conducted in non-backwash conditions of the bio®lter. The study has revealed the best use of the up¯ow bio®lter system for nitri®cation applications and suspended solids removal.

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“…It has been shown previously that sessile microbial cells are more resistant to toxic substances than planktonic cells, making packed-bed bioreactors attractive for studying the degradation of xenobiotic compounds ( Parkin and Speece, 1983 ). Additionally, packed-bed bioreactors have several advantages over stirred-tank bioreactors including compactness, resistance to temperature fluctuations, and limited biomass washout ( Sagberg et al, 1992 ). In the soil, this compound exhibits a half-life of approximately 14 days, whereas 81% of the compound had degraded in 72 h in the bioreactor.…”

Section: Discussionmentioning

confidence: 99%

Accelerated Biodegradation of the Agrochemical Ametoctradin by Soil-Derived Microbial Consortia

Whittington

Singh

et al. 2020

Front. Microbiol.

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Pesticide-resistant plant pathogens are an increasing threat to the global food supply and have generated a need for novel, efficacious agrochemicals. The current regulatory process for approving new agrochemicals is a tedious but necessary process. One way to accelerate the safety evaluation process is to utilize in vitro systems to demonstrate pesticide degradation by soil microbes prior to ex vivo soil evaluations. This approach may have the capability to generate metabolic profiles free of inhibitory substances, such as humic acids, commonly present in ex vivo soil systems. In this study, we used a packed-bed microbial bioreactor to assess the role of the natural soil microbial community during biodegradation of the triazolopyrimidine fungicide, ametoctradin. Metabolite profiles produced during in vitro ametoctradin degradation were similar to the metabolite profiles obtained during environmental fate studies and demonstrated the degradation of 81% of the parent compound in 72 h compared to a half-life of 2 weeks when ametoctradin was left in the soil. The microbial communities of four different soil locations and the bioreactor microbiome were compared using high throughput sequencing. It was found that biodegradation of ametoctradin in both ex vivo soils and in vitro in the bioreactor correlated with an increase in the relative abundance of Burkholderiales, well characterized microbial degraders of xenobiotic compounds.

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Biofilm Reactors: A Compact Solution for the Upgrading of Waste Water Treatment Plants

Cited by 18 publications

References 0 publications

Integrative Advanced Oxidation and Biofiltration for Treating Pharmaceuticals in Wastewater

Integrative Advanced Oxidation and Biofiltration for Treating Pharmaceuticals in Wastewater

Studies in nitrification of municipal sewage in an upflow biofilter

Accelerated Biodegradation of the Agrochemical Ametoctradin by Soil-Derived Microbial Consortia

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