Anaerobic treatment of low-strength wastewater with a high fraction of particulate matter in an unconventional two-phase ASBRs system

Donoso‐Bravo, Andrés; Ruíz-Filippi, Gonzalo; Chamy, Rolando

doi:10.1016/j.bej.2008.10.011

Cited by 15 publications

(5 citation statements)

References 25 publications

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“…The pilot plant achieved COD removal efficiencies of 62% on average. Comparable results (69 and 50%) were achieved by Donoso-Bravo et al (2009) in a similar lab scale plant, even though higher COD influent concentrations of about 500 mg-COD/l were involved. While the pilot plant's average COD removal rate is lower than the results presented in literature (Donoso-Bravo et al 2009), the target service water quality of 75 mg-COD/l was almost achieved, even during start-up.…”

Section: Two-stage Organic Digestion Start-upmentioning

confidence: 67%

“…With a 120 liter upflow anaerobic sludge blanket reactor, Barbosa & Sant'Anna (1989) achieved 74% average organic removal treating raw domestic sewage (627 mg-COD/l) with 4 hr HRT. Donoso-Bravo et al (2009) treated low-strength wastewater (500 mg-COD/l) with a high proportion of particulate organic matter (70%, COD basis) using a two-stage system consisting of anaerobic sequencing batch reactors. 69 and 50% COD removal efficiencies were achieved for organic loading rates of 630 and 1,220 mg-COD/l.…”

Section: Introductionmentioning

confidence: 99%

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Start-up of a decentralized pilot plant for the anaerobic treatment of domestic wastewater

Fröba

Vega

Groß

et al. 2017

Water Practice and Technology

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This paper is about the set-up and start-up of a decentralized anaerobic pilot plant for producing domestic service water from domestic wastewater. The plant consists of a two-stage anaerobic digestion process for degrading organic matter and a third-stage for ammonium removal using the Anammox process. Each reactor was started independently with synthetic wastewater of stage-specific composition. They were then fed incrementally with municipal wastewater (MWW). The average removal efficiency of the two-stage digestion process operated with 100% MWW was 62% with 24-hour retention time. The Anammox stage achieved a maximum ammonium removal efficiency of 95% with 100% MWW, if the NO 2 -N to NH 4 -N ratio was set at 1.14. The plant was operated for 200 days. The average removal efficiencies were 81% for COD and 96% for NH 4 -N, with average treated effluent concentrations of 39 mg-COD/l and 1 mg-NH 4 -N/l. Thus the self-defined service water limits of 75 mg-COD/l and 10 mg-NH 4 -N/l were achieved easily.

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Section: Two-stage Organic Digestion Start-upmentioning

confidence: 67%

Section: Introductionmentioning

confidence: 99%

Start-up of a decentralized pilot plant for the anaerobic treatment of domestic wastewater

Fröba

Vega

Groß

et al. 2017

Water Practice and Technology

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“…On the other hand, the separation of the main reactions of anaerobic digestion, acidogenesis and methanogenesis, allows the selection and enhancement of microbial populations in each reactor in terms of temperature and pH, and it also allows for control of the intermediate products (Speece 1996). Some studies have evaluated two-phase ASBRs connected in series (Bouallagui et al 2004;Donoso-Bravo et al 2009), and acidogenic degradation in an ASBR of phenolic wastewater has also been applied (Chin et al 2005).…”

Section: Introductionmentioning

confidence: 99%

Anaerobic sequencing batch reactor as an alternative for the biological treatment of wine distillery effluents

Donoso‐Bravo

Rosenkranz

Valdivia

et al. 2009

Water Science and Technology

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The goal of this study was to assess the effect of different modes of operation and configurations of Anaerobic Sequencing Batch Reactors (ASBRs) treating phenolic wastewater. Several lab-scale reactors were used in the mesophilic range. The reactors were fed with synthetic wastewater with a COD of 5 g/L using phenol as a carbon source (variable concentration) and glucose as a co-substrate. One and two-phase (hydrolytic/acidogenic-methanogenic) systems in batch and fed-batch operation were evaluated. The one-stage reactor operated by the fed batch (which was the only configuration using phenol as a sole carbon source), presented better results for the removal of phenol, reaching 100% removal in 10 days at a concentration of 210 mg/L. The two-stage configuration had removal percentages near 100%, but the methanogenic reactor presented greater degradation of the remaining phenol not removed in the hydrolytic/acidogenic reactor. ASBRs might be a feasible alternative to treat this type of effluent due to their operational flexibility.

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“…The most possible way of achieving higher organics removal from the domestic wastewater stream is to add another anaerobic pre-treatment chamber prior to the MFC. The pre-treatment chamber will enhance fermentative microbial degradation (hydrolysis, acidogenesis and acetogenesis) of complex polymers such as starch, cellulose and lignin and convert them into simple volatile fatty acids (Donoso-Bravo et al 2009). At the same time, the MFC reactor design and the selection of materials should be optimized to achieve sufficient microbial density within the vicinity of the MFC electrode to harvest maximum electrons.…”

Section: Ncc Daymentioning

confidence: 99%

A sandwiched denitrifying biocathode in a microbial fuel cell for electricity generation and waste minimization

Al‐Mamun

Lefebvre

Baawain

et al. 2016

Int. J. Environ. Sci. Technol.

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A denitrifying biocathode in a microbial fuel cell was developed to investigate the replacement of the costly Pt-coated abiotic cathodes for electricity generation. The denitrifying biocathode was sandwiched between the dual-anode systems. The study investigated the performance for simultaneous treatment of wastewater on the anode, biological denitrification on the cathode and the potential recovery of electrical energy. Autotrophic biofilms performed denitrification on the cathode using supplied electrons by the biodegradation of organics on the anode. Graphite granules were used as electrodes for biofilm attachment, and nafion membranes were used as separators between electrodes. The system achieved a volumetric power of 7 ± 0.4 W m -3 net cathodic compartment (NCC) with the simultaneous removal of 229.5 ± 18 mg L -1 COD on anode and 88.9 g m -3NCC day -1 nitrogen on cathode, respectively. The columbic efficiency for cathodic and anodic reactions was 98.9 ± 0.57 and 23.54 ± 0.87 %, respectively. This is a combined study for domestic wastewater treatment and biological denitrification in a compact MFC reactor.Further optimization of the system is desired to improve its performance and applicability.

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Anaerobic treatment of low-strength wastewater with a high fraction of particulate matter in an unconventional two-phase ASBRs system

Cited by 15 publications

References 25 publications

Start-up of a decentralized pilot plant for the anaerobic treatment of domestic wastewater

Start-up of a decentralized pilot plant for the anaerobic treatment of domestic wastewater

Anaerobic sequencing batch reactor as an alternative for the biological treatment of wine distillery effluents

A sandwiched denitrifying biocathode in a microbial fuel cell for electricity generation and waste minimization

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