The stability of anaerobic digesters operating on a food-processing wastewater

F. R. Hawkes; A. Rozzi; K. Black; A. Guwy; D. L. Hawkes

doi:10.2166/wst.1992.0140

The stability of anaerobic digesters operating on a food-processing wastewater

F. R. Hawkes^*, A. Rozzi, K. Black, A. Guwy, D. L. Hawkes

^*Corresponding author for this work

Research output: Contribution to journal › Conference article › peer-review

22 Citations (Scopus)

Abstract

The response to step overloads of laboratory-scale contact process and UASB reactors and a pilot-scale anaerobic filter is examined. The reactors were operated on ice-cream waste water and changes in operational parameters including VFA levels and COD reduction were monitored. In the laboratory-scale experiments, feed strength was increased from 4500 to 22,000 mg [O] per litre for periods of 2 to 12 hours in contact process and one and two-stage UASB reactors. UASB stability was improved by supplementing with trace metals. Two-stage UASB's gave better COD removals under shock loading than single-stage UASB's or contact process reactors. In an 8 hour step overload experiment on the pilot-scale reactor, bicarbonate alkalinity was shown to be a good indicator of instability.

Original language	English
Pages (from-to)	73-82
Number of pages	10
Journal	Water Science and Technology
Volume	25
Issue number	7
DOIs	https://doi.org/10.2166/wst.1992.0140
Publication status	Published - 1992
Event	Proceedings of the 6th International Symposium on Anaerobic Digestion - Sao Paulo, Braz Duration: 12 May 1991 → 16 May 1991

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title = "The stability of anaerobic digesters operating on a food-processing wastewater",

abstract = "The response to step overloads of laboratory-scale contact process and UASB reactors and a pilot-scale anaerobic filter is examined. The reactors were operated on ice-cream waste water and changes in operational parameters including VFA levels and COD reduction were monitored. In the laboratory-scale experiments, feed strength was increased from 4500 to 22,000 mg [O] per litre for periods of 2 to 12 hours in contact process and one and two-stage UASB reactors. UASB stability was improved by supplementing with trace metals. Two-stage UASB's gave better COD removals under shock loading than single-stage UASB's or contact process reactors. In an 8 hour step overload experiment on the pilot-scale reactor, bicarbonate alkalinity was shown to be a good indicator of instability.",

author = "Hawkes, {F. R.} and A. Rozzi and K. Black and A. Guwy and Hawkes, {D. L.}",

year = "1992",

doi = "10.2166/wst.1992.0140",

language = "English",

volume = "25",

pages = "73--82",

journal = "Water Science and Technology",

issn = "0273-1223",

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number = "7",

note = "Proceedings of the 6th International Symposium on Anaerobic Digestion ; Conference date: 12-05-1991 Through 16-05-1991",

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TY - JOUR

T1 - The stability of anaerobic digesters operating on a food-processing wastewater

AU - Hawkes, F. R.

AU - Rozzi, A.

AU - Black, K.

AU - Guwy, A.

AU - Hawkes, D. L.

PY - 1992

Y1 - 1992

N2 - The response to step overloads of laboratory-scale contact process and UASB reactors and a pilot-scale anaerobic filter is examined. The reactors were operated on ice-cream waste water and changes in operational parameters including VFA levels and COD reduction were monitored. In the laboratory-scale experiments, feed strength was increased from 4500 to 22,000 mg [O] per litre for periods of 2 to 12 hours in contact process and one and two-stage UASB reactors. UASB stability was improved by supplementing with trace metals. Two-stage UASB's gave better COD removals under shock loading than single-stage UASB's or contact process reactors. In an 8 hour step overload experiment on the pilot-scale reactor, bicarbonate alkalinity was shown to be a good indicator of instability.

AB - The response to step overloads of laboratory-scale contact process and UASB reactors and a pilot-scale anaerobic filter is examined. The reactors were operated on ice-cream waste water and changes in operational parameters including VFA levels and COD reduction were monitored. In the laboratory-scale experiments, feed strength was increased from 4500 to 22,000 mg [O] per litre for periods of 2 to 12 hours in contact process and one and two-stage UASB reactors. UASB stability was improved by supplementing with trace metals. Two-stage UASB's gave better COD removals under shock loading than single-stage UASB's or contact process reactors. In an 8 hour step overload experiment on the pilot-scale reactor, bicarbonate alkalinity was shown to be a good indicator of instability.

U2 - 10.2166/wst.1992.0140

DO - 10.2166/wst.1992.0140

M3 - Conference article

AN - SCOPUS:0026617452

SN - 0273-1223

VL - 25

SP - 73

EP - 82

JO - Water Science and Technology

JF - Water Science and Technology

IS - 7

T2 - Proceedings of the 6th International Symposium on Anaerobic Digestion

Y2 - 12 May 1991 through 16 May 1991

ER -

The stability of anaerobic digesters operating on a food-processing wastewater

Abstract

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