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Development of Sulfidogenic Sludge from Marine Sediments and Trichloroethylene Reduction in an Upflow Anaerobic Sludge Blanket Reactor
Published on: October 15, 2015
Impact of substrate concentration on anammox-UBF reactors start-up
Yujie Qin1, Bin Han2, Yan Cao2
1School of Environment and Energy, South China University of Technology, Guangzhou Higher Education Mega Centre, Guangzhou 510006, PR China; The Key Lab of Pollution Control and Ecosystem Restoration in Industry Clusters, Ministry of Education, South China University of Technology, Guangzhou Higher Education Mega Centre, Guangzhou 510006, PR China; Guangdong Provincial Engineering and Technology Research Centre for Environmental Risk Prevention and Emergency Disposal, South China University of Technology, Guangzhou Higher Education Mega Centre, Guangzhou 510006, PR China.
Abstract:
Two up-flow blanket filter (UBF) reactors were employed to treat synthetic wastewater with different substrate concentrations and nitrogen load rates (NLR) for 178days. During days 0-60, higher influent NLR of R2 (0.21-0.58kg·m3·d) slowed down the formation of anammox sludge compared with the lower NLR of R1 (0.18-0.31kg·m3·d). Difference in sludge color and nitrogen conversion rate indicated greater anammox activity of R2 than R1. During days 61-178, R1 and R2 achieved the maximum nitrogen removal rates (NRR) of 1.213 and 1.684kg/(m3·d) under the NLRs of 1.924 and 2.502kg/(m3·d), respectively. Furthermore, high-throughput sequencing showed that R2 (43.5%) had a higher proportion of anammox bacteria than R1 (37.8%) and less species. These results showed that after going through a higher NLR acclimation process during start-up period, stronger resistant capability against high impact nitrogen load and greater anammox activity were obtained by R2.
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