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This study evaluates the performance of a hybrid moving bed biofilm bioreactor integrated with a membrane bioreactor (HMBBR-MBR) to remove carbon and nitrogen from wastewater in batch mode simultaneously. Unlike conventional systems requiring separate anoxic tanks and external carbon sources, the HMBBR-MBR consolidates these processes into one unit. Biocarriers within the reactor provides the protective surface for biofilm formation under anoxic conditions, facilitating efficient denitrification through heterotrophic microorganisms. Additionally, suspended biomass ensures uniform substrate distribution throughout the reactor. Synthetic wastewater containing dextrose as a carbon source and ammonium sulfate as a nitrogen source was fed simultaneously into the reactor. Experimental results demonstrated over 90% organic carbon removal, measured as COD. Total nitrogen removal was initially 80% (NH₄+-N), increasing to 93% as the batch progressed, with the conversion of NO₂−-N to NO₃−-N and vice versa. Alkalinity changes confirmed simultaneous nitrification and denitrification, marked by peak alkalinity values at the end of batches. The attached biomass accounted for 60% of the total biomass (suspended and attached), which plays a vital role in denitrification. Coupling the MBR ensured complete solids separation, achieving over 90% removal efficiency. These results highlight the HMBBR-MBR’s potential as a compact, effective, and sustainable solution for wastewater treatment.

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Combined Carbon and Nitrogen Removal from Synthetic Wastewater in an MBHBR Coupled with MBR

  • 会议论文

  • 发表日期：

    2026年

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  • Tanmoy Bir,
  • Debabrata Mazumder

摘要

This study evaluates the performance of a hybrid moving bed biofilm bioreactor integrated with a membrane bioreactor (HMBBR-MBR) to remove carbon and nitrogen from wastewater in batch mode simultaneously. Unlike conventional systems requiring separate anoxic tanks and external carbon sources, the HMBBR-MBR consolidates these processes into one unit. Biocarriers within the reactor provides the protective surface for biofilm formation under anoxic conditions, facilitating efficient denitrification through heterotrophic microorganisms. Additionally, suspended biomass ensures uniform substrate distribution throughout the reactor. Synthetic wastewater containing dextrose as a carbon source and ammonium sulfate as a nitrogen source was fed simultaneously into the reactor. Experimental results demonstrated over 90% organic carbon removal, measured as COD. Total nitrogen removal was initially 80% (NH₄+-N), increasing to 93% as the batch progressed, with the conversion of NO₂−-N to NO₃−-N and vice versa. Alkalinity changes confirmed simultaneous nitrification and denitrification, marked by peak alkalinity values at the end of batches. The attached biomass accounted for 60% of the total biomass (suspended and attached), which plays a vital role in denitrification. Coupling the MBR ensured complete solids separation, achieving over 90% removal efficiency. These results highlight the HMBBR-MBR’s potential as a compact, effective, and sustainable solution for wastewater treatment.