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Comparison of two different anaerobic feeding strategies to establish a stable aerobic granulated sludge bed.
Water Res. 2013 Nov 01; 47(17):6423-31.WR

Abstract

Two different anaerobic feeding strategies were compared to optimize the development and performance of aerobic granules. A stable aerobic granulation of activated sludge was achieved with an anaerobic plug flow operation (PI) and a fast influent step followed by an anaerobic mixing phase (PII). Two lab scale sequencing batch reactors (SBRs) were operated to test the different operation modes. PI with plug flow and a reactor H/D (height/diameter) ratio of 9 achieved a biomass concentration of 20 g(TSS)/L and an effluent TSS concentration of 0.10 g(TSS)/L. PII with the mixed anaerobic phase directly after feeding and a reactor H/D ratio of 2 achieved a biomass concentration of 9 g(TSS)/L and an effluent quality of 0.05 g(TSS)/L. Furthermore, it is shown that the plug flow regime during anaerobic feeding together with the lower H/D ratio of 2 led to channeling effects, which resulted in lower storage of organic carbon and a general destabilization of the granulation process. Compared to the plug flow regime (PI), the anaerobic mixing (PII) provided lower substrate gradients within the biofilm. However, these disadvantages could be compensated by higher mass transfer coefficients in PII (k(L) = 0.3 m/d for PI; k(L) = 86 m/d for PII) during the anaerobic phase.

Authors+Show Affiliations

Technische Universität München, Chair of Urban Water Systems Engineering, Am Coulombwall, 85748 Garching, Germany.No affiliation info availableNo affiliation info availableNo affiliation info availableNo affiliation info availableNo affiliation info availableNo affiliation info available

Pub Type(s)

Comparative Study
Journal Article

Language

eng

PubMed ID

24103394

Citation

Rocktäschel, T, et al. "Comparison of Two Different Anaerobic Feeding Strategies to Establish a Stable Aerobic Granulated Sludge Bed." Water Research, vol. 47, no. 17, 2013, pp. 6423-31.
Rocktäschel T, Klarmann C, Helmreich B, et al. Comparison of two different anaerobic feeding strategies to establish a stable aerobic granulated sludge bed. Water Res. 2013;47(17):6423-31.
Rocktäschel, T., Klarmann, C., Helmreich, B., Ochoa, J., Boisson, P., Sørensen, K. H., & Horn, H. (2013). Comparison of two different anaerobic feeding strategies to establish a stable aerobic granulated sludge bed. Water Research, 47(17), 6423-31. https://doi.org/10.1016/j.watres.2013.08.014
Rocktäschel T, et al. Comparison of Two Different Anaerobic Feeding Strategies to Establish a Stable Aerobic Granulated Sludge Bed. Water Res. 2013 Nov 1;47(17):6423-31. PubMed PMID: 24103394.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Comparison of two different anaerobic feeding strategies to establish a stable aerobic granulated sludge bed. AU - Rocktäschel,T, AU - Klarmann,C, AU - Helmreich,B, AU - Ochoa,J, AU - Boisson,P, AU - Sørensen,K H, AU - Horn,H, Y1 - 2013/08/27/ PY - 2013/04/15/received PY - 2013/08/07/revised PY - 2013/08/09/accepted PY - 2013/10/10/entrez PY - 2013/10/10/pubmed PY - 2014/5/23/medline KW - Aerobic granulation KW - Anaerobic mixing KW - Biological phosphorus removal KW - Nitrogen removal KW - PAOs KW - Plug flow SP - 6423 EP - 31 JF - Water research JO - Water Res. VL - 47 IS - 17 N2 - Two different anaerobic feeding strategies were compared to optimize the development and performance of aerobic granules. A stable aerobic granulation of activated sludge was achieved with an anaerobic plug flow operation (PI) and a fast influent step followed by an anaerobic mixing phase (PII). Two lab scale sequencing batch reactors (SBRs) were operated to test the different operation modes. PI with plug flow and a reactor H/D (height/diameter) ratio of 9 achieved a biomass concentration of 20 g(TSS)/L and an effluent TSS concentration of 0.10 g(TSS)/L. PII with the mixed anaerobic phase directly after feeding and a reactor H/D ratio of 2 achieved a biomass concentration of 9 g(TSS)/L and an effluent quality of 0.05 g(TSS)/L. Furthermore, it is shown that the plug flow regime during anaerobic feeding together with the lower H/D ratio of 2 led to channeling effects, which resulted in lower storage of organic carbon and a general destabilization of the granulation process. Compared to the plug flow regime (PI), the anaerobic mixing (PII) provided lower substrate gradients within the biofilm. However, these disadvantages could be compensated by higher mass transfer coefficients in PII (k(L) = 0.3 m/d for PI; k(L) = 86 m/d for PII) during the anaerobic phase. SN - 1879-2448 UR - https://www.unboundmedicine.com/medline/citation/24103394/Comparison_of_two_different_anaerobic_feeding_strategies_to_establish_a_stable_aerobic_granulated_sludge_bed_ L2 - https://linkinghub.elsevier.com/retrieve/pii/S0043-1354(13)00654-4 DB - PRIME DP - Unbound Medicine ER -