Efficient organic carbon utilization for combined nutrient removal and biogas production in hybrid biofilm activated sludge system

G. Gunes; D. Guven; E. Cokgor; G. E.Zengin Balci; G. Ozyildiz; A. Erdincler; D. Okutman Tas; I. Takács; G. Insel

doi:10.1016/j.bej.2023.108862

Efficient organic carbon utilization for combined nutrient removal and biogas production in hybrid biofilm activated sludge system

G. Gunes, D. Guven, E. Cokgor, G. E.Zengin Balci, G. Ozyildiz, A. Erdincler, D. Okutman Tas, I. Takács, G. Insel^*

^*Corresponding author for this work

Department of Environmental Engineering

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

Abstract

Moving bed biofilm technology is a successful and promising biological treatment process considered for cost-effective management of wastewaters. In this study, a hybrid moving bed biofilm pilot plant was operated and obtained results were compared with simulation results of two biological processes: a conventional Biological Nutrient Removal (BNR) system and a novel hybrid activated sludge configuration implemented with Moving Bed Biofilm Reactor (MBBR) and a reactive primary clarifier (RPC). An efficient organic carbon entrapment (87%) was obtained in reactive primary clarifier where the major component (95%) of the total Chemical Oxygen Demand (COD) was determined as slowly hydrolysable (X_S1), according to respirometric tests. Pilot plant and simulation studies exhibited that an improved nitrogen and phosphorus removal performance, as well as higher biogas production (47%) were obtained by organic carbon redirection in proposed hybrid configurations, securing a 40% less reactor volume. Investigation of the economic aspects indicated that hybrid system has a lower operating cost (i.e., 23% less air requirement, 40% less mixing energy requirement), does not require internal recirculation pumps, and produces more energy through anaerobic digestion compared to conventional BNR. Therefore, proposed novel hybrid configuration is more efficient for the treatment of municipal wastewater in terms of Capital Expenditures (CAPEX) and Operational Expenditures (OPEX) within the energy self-sufficient treatment plant approach and sustainable treatment plant operation.

Original language	English
Article number	108862
Journal	Biochemical Engineering Journal
Volume	193
DOIs	https://doi.org/10.1016/j.bej.2023.108862
Publication status	Published - Apr 2023

Bibliographical note

Publisher Copyright:
© 2023 Elsevier B.V.

Funding

This work was funded by the Scientific and Technological Research Council of Turkey (TUBITAK, Project # 117Y087 ). The authors would like to thank Istanbul Water and Sewerage Administration of Istanbul (ISKI) for housing Hybrid AS-MBBR pilot plant in full scale WWTP. This work was funded by the Scientific and Technological Research Council of Turkey (TUBITAK, Project # 117Y087). The authors would like to thank Istanbul Water and Sewerage Administration of Istanbul (ISKI) for housing Hybrid AS-MBBR pilot plant in full scale WWTP.

Funders	Funder number
ISKI
Istanbul Water and Sewerage Administration of Istanbul
Türkiye Bilimsel ve Teknolojik Araştırma Kurumu	117Y087

Keywords

Energy recovery
Hybrid system
Moving bed bioreactor
Organic matter redirection
Reactive primary clarifier
Respirometry

UN SDGs

This output contributes to the following UN Sustainable Development Goals (SDGs)

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10.1016/j.bej.2023.108862

Cite this

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title = "Efficient organic carbon utilization for combined nutrient removal and biogas production in hybrid biofilm activated sludge system",

abstract = "Moving bed biofilm technology is a successful and promising biological treatment process considered for cost-effective management of wastewaters. In this study, a hybrid moving bed biofilm pilot plant was operated and obtained results were compared with simulation results of two biological processes: a conventional Biological Nutrient Removal (BNR) system and a novel hybrid activated sludge configuration implemented with Moving Bed Biofilm Reactor (MBBR) and a reactive primary clarifier (RPC). An efficient organic carbon entrapment (87%) was obtained in reactive primary clarifier where the major component (95%) of the total Chemical Oxygen Demand (COD) was determined as slowly hydrolysable (XS1), according to respirometric tests. Pilot plant and simulation studies exhibited that an improved nitrogen and phosphorus removal performance, as well as higher biogas production (47%) were obtained by organic carbon redirection in proposed hybrid configurations, securing a 40% less reactor volume. Investigation of the economic aspects indicated that hybrid system has a lower operating cost (i.e., 23% less air requirement, 40% less mixing energy requirement), does not require internal recirculation pumps, and produces more energy through anaerobic digestion compared to conventional BNR. Therefore, proposed novel hybrid configuration is more efficient for the treatment of municipal wastewater in terms of Capital Expenditures (CAPEX) and Operational Expenditures (OPEX) within the energy self-sufficient treatment plant approach and sustainable treatment plant operation.",

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AU - Balci, G. E.Zengin

AU - Ozyildiz, G.

AU - Erdincler, A.

AU - Tas, D. Okutman

AU - Takács, I.

AU - Insel, G.

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AB - Moving bed biofilm technology is a successful and promising biological treatment process considered for cost-effective management of wastewaters. In this study, a hybrid moving bed biofilm pilot plant was operated and obtained results were compared with simulation results of two biological processes: a conventional Biological Nutrient Removal (BNR) system and a novel hybrid activated sludge configuration implemented with Moving Bed Biofilm Reactor (MBBR) and a reactive primary clarifier (RPC). An efficient organic carbon entrapment (87%) was obtained in reactive primary clarifier where the major component (95%) of the total Chemical Oxygen Demand (COD) was determined as slowly hydrolysable (XS1), according to respirometric tests. Pilot plant and simulation studies exhibited that an improved nitrogen and phosphorus removal performance, as well as higher biogas production (47%) were obtained by organic carbon redirection in proposed hybrid configurations, securing a 40% less reactor volume. Investigation of the economic aspects indicated that hybrid system has a lower operating cost (i.e., 23% less air requirement, 40% less mixing energy requirement), does not require internal recirculation pumps, and produces more energy through anaerobic digestion compared to conventional BNR. Therefore, proposed novel hybrid configuration is more efficient for the treatment of municipal wastewater in terms of Capital Expenditures (CAPEX) and Operational Expenditures (OPEX) within the energy self-sufficient treatment plant approach and sustainable treatment plant operation.

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Efficient organic carbon utilization for combined nutrient removal and biogas production in hybrid biofilm activated sludge system

Abstract

Bibliographical note

Funding

Keywords

UN SDGs

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