Treatment of dilute wastewater in a UASB reactor at a moderate temperature: Performance aspects

Lalit K. Agrawal; Hideki Harada; Hiroyuki Okui

doi:10.1016/S0922-338X(97)83579-9

Treatment of dilute wastewater in a UASB reactor at a moderate temperature: Performance aspects

Lalit K. Agrawal, Hideki Harada, Hiroyuki Okui

New Industry Creation Hatchery Center (NICHe)

Research output: Contribution to journal › Article › peer-review

27 Citations (Scopus)

Abstract

The treatability of dilute wastewater by a UASB reactor was evaluated. After being seeded with digested sewage sludge, a 110-l reactor was operated at 25 °C under continuous feeding with synthetic wastewater having a COD of 300 mg/l for over 700 d. The hydraulic retention time (HRT) was successfully decreased in steps to 9 h (0.73 kg COD/m³/d). Granules began to be observed after the reactor had been in operation for 9 months. At an HRT of 9 h, the following results were obtained: soluble and total COD removal, 81±5% and 73±7%, respectively; methane production, 212 Nl/kg COD removed and 153 Nl/kg COD added; substrate conversion, 0.24 kg COD removed/kg VSS/d.

Original language	English
Pages (from-to)	179-184
Number of pages	6
Journal	Journal of Fermentation and Bioengineering
Volume	83
Issue number	2
DOIs	https://doi.org/10.1016/S0922-338X(97)83579-9
Publication status	Published - 1997 Jan 1

Keywords

COD mass balance
UASB reactor
anaerobic process
developing countries
granule size distribution
sewage
sludge retention time
treatment performance

ASJC Scopus subject areas

Biotechnology
Applied Microbiology and Biotechnology

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Cite this

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abstract = "The treatability of dilute wastewater by a UASB reactor was evaluated. After being seeded with digested sewage sludge, a 110-l reactor was operated at 25 °C under continuous feeding with synthetic wastewater having a COD of 300 mg/l for over 700 d. The hydraulic retention time (HRT) was successfully decreased in steps to 9 h (0.73 kg COD/m3/d). Granules began to be observed after the reactor had been in operation for 9 months. At an HRT of 9 h, the following results were obtained: soluble and total COD removal, 81±5% and 73±7%, respectively; methane production, 212 Nl/kg COD removed and 153 Nl/kg COD added; substrate conversion, 0.24 kg COD removed/kg VSS/d.",

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T2 - Performance aspects

AU - Agrawal, Lalit K.

AU - Harada, Hideki

AU - Okui, Hiroyuki

PY - 1997/1/1

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N2 - The treatability of dilute wastewater by a UASB reactor was evaluated. After being seeded with digested sewage sludge, a 110-l reactor was operated at 25 °C under continuous feeding with synthetic wastewater having a COD of 300 mg/l for over 700 d. The hydraulic retention time (HRT) was successfully decreased in steps to 9 h (0.73 kg COD/m3/d). Granules began to be observed after the reactor had been in operation for 9 months. At an HRT of 9 h, the following results were obtained: soluble and total COD removal, 81±5% and 73±7%, respectively; methane production, 212 Nl/kg COD removed and 153 Nl/kg COD added; substrate conversion, 0.24 kg COD removed/kg VSS/d.

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KW - COD mass balance

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KW - anaerobic process

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KW - granule size distribution

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KW - sludge retention time

KW - treatment performance

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Treatment of dilute wastewater in a UASB reactor at a moderate temperature: Performance aspects

Abstract

Keywords

ASJC Scopus subject areas

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