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Effect of sludge age on the performance of a membrane bioreactor: influence on nutrients and metal removal

Effect of sludge age on the performance of a membrane bioreactor: influence on nutrients and metal removal
Effect of sludge age on the performance of a membrane bioreactor: influence on nutrients and metal removal
In this paper the effect of different SRT on the performances of an ultrafiltration pilot MBR operating with real wastewaters was tested to analyse both the ability of the system to remove nutrients and micropollutants and the possible decrease in waste sludge production. Increasing MLSS from 4 to 9 g/l reduced biomass production by 84% and increasing MLSS from 9 g/l to 17 g/l reduced biomass production by 75%. The progressive sludge mineralization was clear since the VSS decreases from 75% TSS to 52% TSS. The industrial fraction of the influent affected the denitrification in all the three periods. The effluent quality increased only when passing from short SRT to long SRT. Ag, Cd and Sn removal was>99% in all the runs. Cu removal was 72–89%. Hg removal was>90% while Pb had varying behavior due to its inconstant presence in the influent (50–65%). B and Se seemed not to be efficiently retained by the biomass in both experimental conditions (0–28% and 0–31%, respectively). Arsenic was a major concern (33–37%). The next step of the research will focus on the possibility of enhancing As removal by looking at alternative technologies to integrate with the UF process.
0011-9164
467-474
Bolzonella, D
554b33d4-ce6f-4d05-93ac-fcc5d49187f3
Pavan, P
751d1ae9-f461-4af4-9781-66c9df174a3d
Innocenti, L
8595a7f9-2934-4e5c-a615-98914afc0a59
Cecchi, F
97cd0131-4631-48fe-8242-c9b9fb04b0ad
Bolzonella, D
554b33d4-ce6f-4d05-93ac-fcc5d49187f3
Pavan, P
751d1ae9-f461-4af4-9781-66c9df174a3d
Innocenti, L
8595a7f9-2934-4e5c-a615-98914afc0a59
Cecchi, F
97cd0131-4631-48fe-8242-c9b9fb04b0ad

Bolzonella, D, Pavan, P, Innocenti, L and Cecchi, F (2002) Effect of sludge age on the performance of a membrane bioreactor: influence on nutrients and metal removal. Desalination, 146 (1-3), 467-474. (doi:10.1016/S0011-9164(02)00551-9).

Record type: Article

Abstract

In this paper the effect of different SRT on the performances of an ultrafiltration pilot MBR operating with real wastewaters was tested to analyse both the ability of the system to remove nutrients and micropollutants and the possible decrease in waste sludge production. Increasing MLSS from 4 to 9 g/l reduced biomass production by 84% and increasing MLSS from 9 g/l to 17 g/l reduced biomass production by 75%. The progressive sludge mineralization was clear since the VSS decreases from 75% TSS to 52% TSS. The industrial fraction of the influent affected the denitrification in all the three periods. The effluent quality increased only when passing from short SRT to long SRT. Ag, Cd and Sn removal was>99% in all the runs. Cu removal was 72–89%. Hg removal was>90% while Pb had varying behavior due to its inconstant presence in the influent (50–65%). B and Se seemed not to be efficiently retained by the biomass in both experimental conditions (0–28% and 0–31%, respectively). Arsenic was a major concern (33–37%). The next step of the research will focus on the possibility of enhancing As removal by looking at alternative technologies to integrate with the UF process.

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Published date: 2002

Identifiers

Local EPrints ID: 185903
URI: http://eprints.soton.ac.uk/id/eprint/185903
ISSN: 0011-9164
PURE UUID: a73fffc3-31ba-42ad-8331-35a9b58b79ad

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Date deposited: 24 May 2011 10:37
Last modified: 16 Jul 2019 23:38

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