Nitrogen and carbon removals from food processing wastewater by an anoxic/aerobic membrane bioreactor
2004; Elsevier BV; Volume: 40; Issue: 5 Linguagem: Inglês
10.1016/j.procbio.2004.06.039
ISSN1873-3298
AutoresYing Wang, Xia Huang, Qipeng Yuan,
Tópico(s)Membrane Separation Technologies
ResumoAn anoxic/aerobic membrane bioreactor (MBR) was applied to simultaneous removals of nitrogen and carbon from food processing wastewater in a laboratory scale experiment. By continuous runs under appropriate operational conditions, COD, NH4+N and TN removal was over 94, 91 and 74%, respectively. The anoxic reactor and aerobic MBR contributed 40–63 and 29–46% to COD removal, and 31–43 and 47–64% to NH4+N removal, respectively. Nitrification in the MBR could be enhanced by adding some carriers for growth of adhesive biomass when the system was operated at a shorter sludge retention time (SRT). The maximum volumetric COD and TN loadings as high as 3.4 kg COD m−3 day−1 and 1.26 kg N m−3 day−1 were achieved. Measurement results of sludge activity for nitrification were consistent with the effluent NH4+N concentration change.
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