Performance characteristics of the anaerobic baffled reactor

Bachmann, A.; Beard, Virginia L.; McCarty, Perry L.

doi:10.1016/0043-1354(85)90330-6

Cited by 165 publications

(84 citation statements)

References 7 publications

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“…The baffled reactor can be regarded as a number of UASB reactors in series. Bachmann et al (1985) used this approach combined with a fixed-film model to simulate an ABR. Grobicki and Stuckey (1992) performed residence time distribution studies on both clean and working ABRs and concluded that the hydraulic flow may be characterized by a number of theoretical perfectly mixed reactors in series.…”

Section: Q2s2xmentioning

confidence: 99%

A mathematical model of a high sulphate wastewater anaerobic treatment system

Knobel

Lewis

2002

Water Research

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Section: Q2s2xmentioning

confidence: 99%

A mathematical model of a high sulphate wastewater anaerobic treatment system

Knobel

Lewis

2002

Water Research

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“…The lower parts of the hanging baffles were angled at 45° to evenly direct the flow into the center of the upflow chamber. This configuration facilitated effective mixing and contact between the wastewater and anaerobic sludge at the base of each upflow chamber [10]. Each compartment was equipped with sampling ports that allowed biological solids, gas, and liquid samples to be withdrawn.…”

Section: Experimental Devicesmentioning

confidence: 99%

Performance of an Anaerobic Baffled Filter Reactor in the Treatment of Algae-Laden Water and the Contribution of Granular Sludge

Lü

2014

Water

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This study investigated the performance and stability of an anaerobic baffled filter reactor in the treatment of algae-laden water from Taihu Lake at several organic loading rates. The study also evaluated the capability of soft filler to train granule sludge and improve the anaerobic environment and sludge activity in the anaerobic baffled reactor (ABR), thereby enhancing the treatment efficiency. The ABR consisted of five rectangular compartments, each of which was 120 cm long, 80 cm wide, 80 cm high, and packed with soft filler. The anaerobic baffled filter reactor was found to be an efficient reactor configuration for the treatment of algae-laden water. The reactor was operated at an organic loading rate of 1.5 kg chemical oxygen demand (COD)/(m 3 d) and an ambient temperature of 30 °C; under these conditions, the COD removal efficiency was 80% and the biogas production rate was 293 mL/(Ld). Moreover, the soft filler increased the biomass retention time and decreased the rate at which solids were washed out from the reactor, promoting an improved spatial distribution of the microbial communities within the compartments. Methanoregula, Methanobacteriaceae, Methanosaeta, Methanoculleu, and Thermogymnomonas were the dominant archaeal species in each compartment during an operational period of approximately 100 days. The protease activity in the reactor decreased longitudinally down the reactor from Compartments 1 to 5, whereas the activity of coenzyme F 420 increased. The soft filler played a key role in successfully treating algae-laden water with the anaerobic baffled filter reactor.

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“…They also found that the addition of a recycle stream alleviated the problems of low pH caused by high levels of VFA at the front of the reactor, and discouraged gelatinous bacterial growth at the reactor inlet for the treatment of complex protein carbohydrate wastewater (Bachmann et al, 1983). Recycle was also reported to benefit the ABR through dilution of toxicants in the influent (Bachmann et al, 1985;Grobicki and Stuckey, 1991). On the other hand Grobicki and Stuckey (1992) and Nachaiyasit (1995) noted that with non-granular biomass, recycle had a negative effect caused by increased mixing which encouraged solids loss, and disrupted symbiotic relationships (Henze and Harremoës, 1983).…”

Section: Introductionmentioning

confidence: 99%

Effect of recycle on treatment of aircraft de-icing fluid in an anaerobic baffled reactors

Kennedy¹,

Barriault²

2007

WSA

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Aircraft de-icing fluid at 7 000 mg COD/ℓ was successfully treated in an anaerobic baffled reactor operated with and without recycle at volumetric organic loading rate of between 4 and 11 g COD/ℓ reactor ·d. Reactor recycle was found to improve reactor performance. The anaerobic baffled reactor operated with a 6:1 recycle ratio achieved a minimum hydraulic retention time of 17 h with an acceptable COD removal efficiency of 93% at a volumetric organic loading rate of 9.9 g COD/ℓ reactor ·d. This corresponded to a specific organic loading rate of 0.35 g COD/g VSS·d and specific organic removal rate of 0.32 g COD rem /g VSS·d. Without recycle similar removal efficiency was achieved; however, the loading rates were about 40% less. Due to biomass growth specific organic loading rate was not found to vary significantly through most of the experimental period despite loading rate increases.Hydrodynamically, an anaerobic baffled reactor may be characterised as an in-series continuously stirred tank reactor where the number of continuously stirred tank reactors corresponded to the number of actual compartments. Volatile fatty acid profiles tend to indicate that anaerobic baffled reactor compartmentalisation served to separate acidogenic and methanogenic activities longitudinally through the reactor, with the highest proportion of acidogenic activity in the first compartments. The net accumulated yield within the anaerobic baffled reactor was found to be of 0.007 g VSS/g COD rem when the ABR was operated without recycle and of 0.016 g VSS/g COD rem for the ABR operated with recycle.Keywords: anaerobic baffled reactor, de-icing fluid, treatment Nomenclature ABR = anaerobic baffled reactors ADF = aircraft de-icing fluid COD = chemical oxygen demand CSTR = continuously stirred tank reactor HRT = hydraulic retention time ID = internal diameter OLR = volumetric organic loading rate RTD = residence time distribution SOLR = specific organic loading rate SORR = specific organic removal rate SRT = solids retention time SS = steady state STP = standard temperature and pressure TSS = total suspended solids UASB = upflow anaerobic sludge blanket VFA = volatile fatty acids VSS = volatile suspended solids

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Performance characteristics of the anaerobic baffled reactor

Cited by 165 publications

References 7 publications

A mathematical model of a high sulphate wastewater anaerobic treatment system

A mathematical model of a high sulphate wastewater anaerobic treatment system

Performance of an Anaerobic Baffled Filter Reactor in the Treatment of Algae-Laden Water and the Contribution of Granular Sludge

Effect of recycle on treatment of aircraft de-icing fluid in an anaerobic baffled reactors

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