Effect of Nitrogen Loading Rate and External Carbon Source on Microbial Population and Activity in an SBR
We investigated the impact of nitrogen loading rate (NLR) and external carbon source on microbial population and activity developed in a sequencing batch reactor (SBR) receiving the outflow from an upflow anaerobic sludge blanket (UASB) treating municipal wastewater.The SBR operated at NLRs of 0.13 kg/m3-d and 0.20 kg/m3-d.Fermented liquid produced from the organic fraction of municipal solid waste (OFMSW),acetic acid and fresh leachate produced from OFMSW were tested as external carbon sources.The increase of NLR enhanced the specific ammonium uptake rate (sAUR) from 2.04 to 7.22 mgN/gVSS-h.The denitrification rate and the anoxic/aerobic phosphorus removal rates were much higher when fermentation liquid was employed as external carbon source compared to acetic acid and fresh leachate.FISH quantified analysis was in accordance with the activity tests since the ammonium oxidizing bacteria (AOB) increased with increasing NLR while the nitrite oxidizing bacteria (NOB) decreased.The application of fresh leachate instead of fermented liquid from OFMSW as carbon source decreased the polyphosphate accumulating organisms (PAOs).
nitrogen loading rate external carbon source sequencing batch reactor
E. Katsou S. Malamis N. Frison S. Mazzocchin F. Fatone
Department of Biotechnology, University of Verona, Strada Le Grazie 15, 37134, Verona, Italy Department of Environmental Sciences, Informatics and Statistics, University Ca , Foscari of Venice,
国际会议
2013青岛国际脱盐大会(Qingdao International Conference 2013 on Desalination and Water Reuse)
青岛
英文
16-18
2013-06-25（万方平台首次上网日期，不代表论文的发表时间）