Scum yield and effectiveness of a hydrostatic removal device: case study of Laboreaux STP

Rosa, André Pereira; Santos, Agenor Valadares; Schmidt, Andreas; Borges, J. M.; Chernicharo, C. A. L.

doi:10.2166/wpt.2017.002

Cited by 2 publications

(1 citation statement)

References 6 publications

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“…Pereira et al (2019), working with conventional sewage being treated in UASB reactors, recorded 21 mL•(kgCOD applied ) À1 scum production. Likewise, Rosa et al (2017) obtained values between 6.8 to 14.6 mL•(kgCOD applied ) À1 , and Santos (2014) found scum production between 6.79 and 10.33 mL•(kgCOD applied ) À1 . The CSTP scum production was 395 mL•(kgCOD applied ) À1 , about 20-40 times higher than the recorded yield from UASB reactors.…”

Section: Resultsmentioning

confidence: 91%

Combined compact anaerobic reactors and lamella settlers for decentralized sewage treatment

Lisboa¹,

Silva²,

Ginoris

et al. 2021

Water Practice and Technology

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This work presents a compact plant's development and performance evaluation for the decentralized treatment of domestic sewage. The plant was conceived and installed in a house with four residents in Vicente Pires, Federal District, Brazil. Its purpose was to remove organic matter and solids using a low-cost biological treatment process that was simple to operate. The plant was essentially anaerobic, composed of an up-flow anaerobic reactor and an anaerobic filter, both associated with lamella settlers. It was operated under real conditions and monitored for nineteen months, with removal efficiencies (calculated over the medians) of 81% for COD, 83% for BOD, 51% for Total Solids, 55% for Total Volatile Solids, 87% for Total Suspended Solids, and 100% for Settleable Solids. The plant performed adequately, with no clogging between the plates of the lamella settlers or no offensive odours, and limited amounts of sludge and scum.

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Section: Resultsmentioning

confidence: 91%

Combined compact anaerobic reactors and lamella settlers for decentralized sewage treatment

Lisboa¹,

Silva²,

Ginoris

et al. 2021

Water Practice and Technology

View full text Add to dashboard Cite

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Reduction of scum production in a modified UASB reactor treating domestic sewage

Pereira

Rocha

Pinto

et al. 2019

Water Science and Technology

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The scum accumulation inside gas–solid–liquid separators (GSL) is one of the main limitations of upflow anaerobic sequencing batch (UASB) reactors during treatment of domestic sewage. Although this type of reactor can be equipped with devices that periodically remove scum, this solution has been proved to be very expensive in addition to being inefficient when discharging procedures are not correctly performed. The main goal of this study was to investigate the performance of a modified UASB reactor concept with a GSL separator which promotes continuous scum discharge to the settling compartment. Furthermore, this proposal was compared with a conventional UASB reactor which was used as control. Both reactors in demo-scale were fed with domestic wastewater and scum production was measured. The results demonstrated volumetric reduction of 50%, and 75% reduction in the mass of total solids in the modified reactor. Additionally, the amount of biogas recovered from the modified reactor was higher than the amount that the control reactor recovered. Therefore, the proposed modification has been proved to be effective, bringing new possibilities to the GSL project.

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Scum yield and effectiveness of a hydrostatic removal device: case study of Laboreaux STP

Cited by 2 publications

References 6 publications

Combined compact anaerobic reactors and lamella settlers for decentralized sewage treatment

Combined compact anaerobic reactors and lamella settlers for decentralized sewage treatment

Reduction of scum production in a modified UASB reactor treating domestic sewage

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