Removal of organic halogens (AOX) from municipal wastewater by powdered activated carbon (PAC)/activated sludge (AS) treatment

C. Bornhardt; J. E. Drewes; M. Jekel

doi:10.1016/S0273-1223(97)00207-2

Removal of organic halogens (AOX) from municipal wastewater by powdered activated carbon (PAC)/activated sludge (AS) treatment

C. Bornhardt
, J. E. Drewes
, M. Jekel

Universidad de la Frontera
Technische Universität Berlin

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

29 Scopus citations

Abstract

The effectiveness of different treatments with powdered activated carbons (PAC) to reduce the AOX-levels in municipal wastewater was investigated in a bench-scale activated sludge (AS) treatment plant. The PAC was added either directly to the aerated basin (simultaneous PAC-treatment), or to a partial stream of clarified effluent, which was treated with PAC in an agitated tank and recirculated to the aerated basin (subsequent PAC-treatment with recirculation). The standard advanced biological treatment reduced the AOX-content by 24%. In the pilot-plant, three types of powdered activated carbons were tested for a simultaneous treatment. The treatment with 100 mg/l PICA PCO Super produced an additional reduction of AOX by 20%, whereas a dosage of 50 mg/l NORIT W-20 showed no enhancement effect, and W-35 led to an additional AOX-removal of about 9%. Also, an improved removal of DOC, NH₄-N and PO₄-P was observed. In all cases, the PAC addition caused a significantly improved settling of the AS, reducing the sludge-volume-index, and increasing the content of volatile solids of the PAC-sludge. In general, no evidence of a synergistic effect of the PAC addition to activated sludge, nor bioregeneration of the activated carbon, could be observed. This suggests, that the observed effects probably are caused only by simple adsorption.

Original language	English
Pages (from-to)	147-153
Number of pages	7
Journal	Water Science and Technology
Volume	35
Issue number	10
DOIs	https://doi.org/10.1016/S0273-1223(97)00207-2
State	Published - 1997
Externally published	Yes
Event	Proceedings of the 1996 IAWQ International Conference on Advanced Wastewater Treatment: Nutrient Removal and Anaerobic Processes, AQUATECH'96 - Amsterdam, Neth Duration: 23 Sep 1996 → 25 Sep 1996

Keywords

Activated sludge
Adsorbable organic halogens (AOX)
Advanced wastewater treatment
Dissolved organic carbon (DOC)
Municipal wastewater
PACT-process
Powdered activated carbon (PAC)
Wastewater treatment plant

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10.1016/S0273-1223(97)00207-2

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@article{80c8f4c5641c49589140920539128bcb,

title = "Removal of organic halogens (AOX) from municipal wastewater by powdered activated carbon (PAC)/activated sludge (AS) treatment",

abstract = "The effectiveness of different treatments with powdered activated carbons (PAC) to reduce the AOX-levels in municipal wastewater was investigated in a bench-scale activated sludge (AS) treatment plant. The PAC was added either directly to the aerated basin (simultaneous PAC-treatment), or to a partial stream of clarified effluent, which was treated with PAC in an agitated tank and recirculated to the aerated basin (subsequent PAC-treatment with recirculation). The standard advanced biological treatment reduced the AOX-content by 24\%. In the pilot-plant, three types of powdered activated carbons were tested for a simultaneous treatment. The treatment with 100 mg/l PICA PCO Super produced an additional reduction of AOX by 20\%, whereas a dosage of 50 mg/l NORIT W-20 showed no enhancement effect, and W-35 led to an additional AOX-removal of about 9\%. Also, an improved removal of DOC, NH4-N and PO4-P was observed. In all cases, the PAC addition caused a significantly improved settling of the AS, reducing the sludge-volume-index, and increasing the content of volatile solids of the PAC-sludge. In general, no evidence of a synergistic effect of the PAC addition to activated sludge, nor bioregeneration of the activated carbon, could be observed. This suggests, that the observed effects probably are caused only by simple adsorption.",

keywords = "Activated sludge, Adsorbable organic halogens (AOX), Advanced wastewater treatment, Dissolved organic carbon (DOC), Municipal wastewater, PACT-process, Powdered activated carbon (PAC), Wastewater treatment plant",

author = "C. Bornhardt and Drewes, \{J. E.\} and M. Jekel",

note = "Funding Information: This work was funded by research grant 02 W A 9253/4 of the German Ministry for Education, Research and Technology, and executed in close cooperation with the Water Company of Berlin. which is gratefully acknowledged.; Proceedings of the 1996 IAWQ International Conference on Advanced Wastewater Treatment: Nutrient Removal and Anaerobic Processes, AQUATECH'96 ; Conference date: 23-09-1996 Through 25-09-1996",

year = "1997",

doi = "10.1016/S0273-1223(97)00207-2",

language = "English",

volume = "35",

pages = "147--153",

journal = "Water Science and Technology",

issn = "0273-1223",

publisher = "IWA Publishing",

number = "10",

}

TY - JOUR

T1 - Removal of organic halogens (AOX) from municipal wastewater by powdered activated carbon (PAC)/activated sludge (AS) treatment

AU - Bornhardt, C.

AU - Drewes, J. E.

AU - Jekel, M.

N1 - Funding Information: This work was funded by research grant 02 W A 9253/4 of the German Ministry for Education, Research and Technology, and executed in close cooperation with the Water Company of Berlin. which is gratefully acknowledged.

PY - 1997

Y1 - 1997

N2 - The effectiveness of different treatments with powdered activated carbons (PAC) to reduce the AOX-levels in municipal wastewater was investigated in a bench-scale activated sludge (AS) treatment plant. The PAC was added either directly to the aerated basin (simultaneous PAC-treatment), or to a partial stream of clarified effluent, which was treated with PAC in an agitated tank and recirculated to the aerated basin (subsequent PAC-treatment with recirculation). The standard advanced biological treatment reduced the AOX-content by 24%. In the pilot-plant, three types of powdered activated carbons were tested for a simultaneous treatment. The treatment with 100 mg/l PICA PCO Super produced an additional reduction of AOX by 20%, whereas a dosage of 50 mg/l NORIT W-20 showed no enhancement effect, and W-35 led to an additional AOX-removal of about 9%. Also, an improved removal of DOC, NH4-N and PO4-P was observed. In all cases, the PAC addition caused a significantly improved settling of the AS, reducing the sludge-volume-index, and increasing the content of volatile solids of the PAC-sludge. In general, no evidence of a synergistic effect of the PAC addition to activated sludge, nor bioregeneration of the activated carbon, could be observed. This suggests, that the observed effects probably are caused only by simple adsorption.

AB - The effectiveness of different treatments with powdered activated carbons (PAC) to reduce the AOX-levels in municipal wastewater was investigated in a bench-scale activated sludge (AS) treatment plant. The PAC was added either directly to the aerated basin (simultaneous PAC-treatment), or to a partial stream of clarified effluent, which was treated with PAC in an agitated tank and recirculated to the aerated basin (subsequent PAC-treatment with recirculation). The standard advanced biological treatment reduced the AOX-content by 24%. In the pilot-plant, three types of powdered activated carbons were tested for a simultaneous treatment. The treatment with 100 mg/l PICA PCO Super produced an additional reduction of AOX by 20%, whereas a dosage of 50 mg/l NORIT W-20 showed no enhancement effect, and W-35 led to an additional AOX-removal of about 9%. Also, an improved removal of DOC, NH4-N and PO4-P was observed. In all cases, the PAC addition caused a significantly improved settling of the AS, reducing the sludge-volume-index, and increasing the content of volatile solids of the PAC-sludge. In general, no evidence of a synergistic effect of the PAC addition to activated sludge, nor bioregeneration of the activated carbon, could be observed. This suggests, that the observed effects probably are caused only by simple adsorption.

KW - Activated sludge

KW - Adsorbable organic halogens (AOX)

KW - Advanced wastewater treatment

KW - Dissolved organic carbon (DOC)

KW - Municipal wastewater

KW - PACT-process

KW - Powdered activated carbon (PAC)

KW - Wastewater treatment plant

UR - https://www.scopus.com/pages/publications/0030838936

U2 - 10.1016/S0273-1223(97)00207-2

DO - 10.1016/S0273-1223(97)00207-2

M3 - Conference article

AN - SCOPUS:0030838936

SN - 0273-1223

VL - 35

SP - 147

EP - 153

JO - Water Science and Technology

JF - Water Science and Technology

IS - 10

T2 - Proceedings of the 1996 IAWQ International Conference on Advanced Wastewater Treatment: Nutrient Removal and Anaerobic Processes, AQUATECH'96

Y2 - 23 September 1996 through 25 September 1996

ER -

Removal of organic halogens (AOX) from municipal wastewater by powdered activated carbon (PAC)/activated sludge (AS) treatment

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Keywords

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