The effect of liquid upward velocity and hydraulic retention time on granulation in UASB reactors treating wastewater with a high sulphate content

Alphenaar, P.A.; Visser, André W.; Lettinga, G.

doi:10.1016/0960-8524(93)90038-d

Cited by 155 publications

(75 citation statements)

References 21 publications

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“…Approximately, 1000 granules were counted in each sample, and these results were treated statistically by Anova one-way test (a ¼ 0.05). This methodology was adapted from Alphenaar et al [31]. Table 3 presents the results of the UASB reactor performance.…”

Section: Granule-size Distributionmentioning

confidence: 99%

Application of molecular techniques to evaluate the methanogenic archaea and anaerobic bacteria in the presence of oxygen with different COD:Sulfate ratios in a UASB reactor

et al. 2008

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Section: Granule-size Distributionmentioning

confidence: 99%

Application of molecular techniques to evaluate the methanogenic archaea and anaerobic bacteria in the presence of oxygen with different COD:Sulfate ratios in a UASB reactor

et al. 2008

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“…The granule size was measured at inoculation, the end of adaptation, stages I and IV and the beginning of stage III, according to the protocol described by Alphenaar et al (1993). Granules from the sludge blanket were transferred to a Petri dish to acquire images.…”

Section: Methodsmentioning

confidence: 99%

Influence of co-substrates in the anaerobic degradation of an anionic surfactant

Okada

Esteves

Delforno

et al. 2013

Braz. J. Chem. Eng.

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-The removal of linear alkylbenzene sulfonate (LAS) was evaluated in a UASB reactor using shortchain alcohols (ethanol and methanol) and complex co-substrate (yeast extract). Using only methanol and ethanol as co-substrates resulted in removal of LAS between 30 and 41%. At the end, addition of a complex substrate (yeast extract) increased the removal of LAS to 50%. During the assay, water supply aeration increased the volatile fatty acid of the effluent (70 mg HAc.L -1 ) and decreased the removal of LAS (from 40 to 30%). According to the fluorescence in situ hybridization (FISH) results, the amount of Archaea decreased due to water supply aeration (from 64 to 48%). Furthermore, addition of complex co-substrate increased the total anaerobic bacteria and methanogenic archaea content (three and four log units, respectively), which were estimated using the most probable number technique.

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“…Therefore, each of the concentration variant, the maximum value of the TSS removal efficiency occurred in the reactor with different upflow velocity. Alphenaar et al (1993) have stated that the upflow velocity can influence the treatment system in two ways. Firstly, the hydraulic shearing force can be enhanced by an increase in upflow velocity, which can then trigger the detachment of the captured solids, resulting in a decline in the performance of the system.…”

Section: Bod 5 Removalmentioning

confidence: 99%

Factors Affecting BOD5 and TSS Removal from Wastewater Using UASB Reactor

Syafrudin¹,

Sudarno²,

Rizqianti³

et al. 2015

J. of Environmental Science and Technology

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The purpose of this study is to investigate the efficiency of the UASB reactors (Upflow Anaerobic Sludge Blanket) at the laboratory scale in processing the mixture of domestic wastewater (greywater and black water). Two parameters of influent concentration and the upflow velocity were changed for the evaluation. Low, medium and high influent concentrations were used and the parameters examined were Biological Oxygen Demand (BOD 5 ) and Total Suspended Solid (TSS). Results showed 76% as the maximum BOD 5 removal efficiency and the maximum TSS removal efficiency was 72%. The BOD 5 and TSS concentrations available to be removed by the microorganisms increased with the increasing wastewater concentration. Generally, slower upflow velocity allowed more time for the biomass to achieve substrate decomposition in the wastewater, therefore higher removal efficiency was observed with slower upflow velocity. Nevertheless, further processing of the treated wastewater is recommended as the treatment using the UASB reactor did not meet the quality standards specified by the Ministerial Environmental Decree of Indonesia.

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The effect of liquid upward velocity and hydraulic retention time on granulation in UASB reactors treating wastewater with a high sulphate content

Cited by 155 publications

References 21 publications

Application of molecular techniques to evaluate the methanogenic archaea and anaerobic bacteria in the presence of oxygen with different COD:Sulfate ratios in a UASB reactor

Application of molecular techniques to evaluate the methanogenic archaea and anaerobic bacteria in the presence of oxygen with different COD:Sulfate ratios in a UASB reactor

Influence of co-substrates in the anaerobic degradation of an anionic surfactant

Factors Affecting BOD5 and TSS Removal from Wastewater Using UASB Reactor

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