Effect of increasing the surface area of primary sludge on anaerobic digestion at low temperature

M. Halalsheh; G. Kassab; H. Yazajeen; S. Qumsieh; J. Field

doi:10.1016/j.biortech.2010.08.075

Effect of increasing the surface area of primary sludge on anaerobic digestion at low temperature

M. Halalsheh, G. Kassab, H. Yazajeen, S. Qumsieh, J. Field

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

33 Scopus citations

Abstract

Two sets of reactors were operated at 15°C and at sludge retention times (SRTs) of 65days and 30days, respectively. Each set was operated at six different mixing velocities. Shear forces provided by mixing affected particle size distribution and resulted in different sludge surface areas. The aim was to investigate the effect of increasing primary sludge surface area on anaerobic digestion at low temperature. The maximum surface areas at the applied mixing velocities were 5926cm²/cm³of sludge and 4672cm²/cm³ of sludge at SRTs of 65days and 30days, respectively. The corresponding calculated methanogenesis were 49% and 15% at SRTs of 65days and 30days, respectively. Maximum total solids (TS) reductions were 26% and 11% at 65days and 30days SRTs, respectively. Lipase activity increased with increasing SRT and sludge surface area. Results clearly showed that increasing sludge surface area improved sludge digestion at 15°C.

Original language	English (US)
Pages (from-to)	748-752
Number of pages	5
Journal	Bioresource Technology
Volume	102
Issue number	2
DOIs	https://doi.org/10.1016/j.biortech.2010.08.075
State	Published - Jan 2011

Keywords

Anaerobic digestion
Lipase activity
Mixing velocities
SRT
Surface area

ASJC Scopus subject areas

Bioengineering
Environmental Engineering
Renewable Energy, Sustainability and the Environment
Waste Management and Disposal

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10.1016/j.biortech.2010.08.075

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title = "Effect of increasing the surface area of primary sludge on anaerobic digestion at low temperature",

abstract = "Two sets of reactors were operated at 15°C and at sludge retention times (SRTs) of 65days and 30days, respectively. Each set was operated at six different mixing velocities. Shear forces provided by mixing affected particle size distribution and resulted in different sludge surface areas. The aim was to investigate the effect of increasing primary sludge surface area on anaerobic digestion at low temperature. The maximum surface areas at the applied mixing velocities were 5926cm2/cm3of sludge and 4672cm2/cm3 of sludge at SRTs of 65days and 30days, respectively. The corresponding calculated methanogenesis were 49% and 15% at SRTs of 65days and 30days, respectively. Maximum total solids (TS) reductions were 26% and 11% at 65days and 30days SRTs, respectively. Lipase activity increased with increasing SRT and sludge surface area. Results clearly showed that increasing sludge surface area improved sludge digestion at 15°C.",

keywords = "Anaerobic digestion, Lipase activity, Mixing velocities, SRT, Surface area",

author = "M. Halalsheh and G. Kassab and H. Yazajeen and S. Qumsieh and J. Field",

note = "Funding Information: The authors acknowledge the Badia Research and Development Centre (BRDC)-Jordan and the United States Agency for International Development (USAID) for their financial support. ",

year = "2011",

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AU - Halalsheh, M.

AU - Kassab, G.

AU - Yazajeen, H.

AU - Qumsieh, S.

AU - Field, J.

N1 - Funding Information: The authors acknowledge the Badia Research and Development Centre (BRDC)-Jordan and the United States Agency for International Development (USAID) for their financial support.

PY - 2011/1

Y1 - 2011/1

N2 - Two sets of reactors were operated at 15°C and at sludge retention times (SRTs) of 65days and 30days, respectively. Each set was operated at six different mixing velocities. Shear forces provided by mixing affected particle size distribution and resulted in different sludge surface areas. The aim was to investigate the effect of increasing primary sludge surface area on anaerobic digestion at low temperature. The maximum surface areas at the applied mixing velocities were 5926cm2/cm3of sludge and 4672cm2/cm3 of sludge at SRTs of 65days and 30days, respectively. The corresponding calculated methanogenesis were 49% and 15% at SRTs of 65days and 30days, respectively. Maximum total solids (TS) reductions were 26% and 11% at 65days and 30days SRTs, respectively. Lipase activity increased with increasing SRT and sludge surface area. Results clearly showed that increasing sludge surface area improved sludge digestion at 15°C.

AB - Two sets of reactors were operated at 15°C and at sludge retention times (SRTs) of 65days and 30days, respectively. Each set was operated at six different mixing velocities. Shear forces provided by mixing affected particle size distribution and resulted in different sludge surface areas. The aim was to investigate the effect of increasing primary sludge surface area on anaerobic digestion at low temperature. The maximum surface areas at the applied mixing velocities were 5926cm2/cm3of sludge and 4672cm2/cm3 of sludge at SRTs of 65days and 30days, respectively. The corresponding calculated methanogenesis were 49% and 15% at SRTs of 65days and 30days, respectively. Maximum total solids (TS) reductions were 26% and 11% at 65days and 30days SRTs, respectively. Lipase activity increased with increasing SRT and sludge surface area. Results clearly showed that increasing sludge surface area improved sludge digestion at 15°C.

KW - Anaerobic digestion

KW - Lipase activity

KW - Mixing velocities

KW - SRT

KW - Surface area

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Effect of increasing the surface area of primary sludge on anaerobic digestion at low temperature

Abstract

Keywords

ASJC Scopus subject areas

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