Extended statistical entropy analysis (eSEA) is used to assess the nitrogen (N) removal performance of the wastewater treatment (WWT) simulation software, the Benchmarking Simulation Model No. 2 (BSM No. 2 ). Six simulations with three different types of wastewater are carried out, which vary in the dissolved oxygen concentration (O 2,diss.) during the aerobic treatment. N 2O emissions generated during denitrification are included in the model. The N-removal performance is expressed as reduction in statistical entropy, ΔH, compared to the hypothetical reference situation of direct discharge of the wastewater into the river. The parameters chemical and biological oxygen demand (COD, BOD) and suspended solids (SS) are analogously expressed in terms of reduction of COD, BOD, and SS, compared to a direct discharge of the wastewater to the river (ΔEQ rest). The cleaning performance is expressed as ΔEQ new, the weighted average of ΔH and ΔEQ rest. The results show that ΔEQ new is a more comprehensive indicator of the cleaning performance because, in contrast to the traditional effluent quality index (EQ), it considers the characteristics of the wastewater, includes all N-compounds and their distribution in the effluent, the off-gas, and the sludge. Furthermore, it is demonstrated that realistically expectable N 2O emissions have only a moderate impact on ΔEQ new.
References
[1]
Jeppsson, U.; Pons, M.-N.; Nopens, I.; Alex, J.; Copp, J.B.; Gernaey, K.V.; Rosen, C.; Steyer, J.-P.; Vanrollehghem, P.A. Benchmark simulation model No. 2: General protocol and exploratory case studies. Water Sci. Technol. 2007, 56, 67–78.
[2]
IPCC. Climate Change 2001: The Scientific Basis. In Atmosferic Chemistry and Greenhouse Gases; UNEP GRID-Ardenal: Ardenal, Norway, 2001. Chapter 4.
[3]
Gupta, D.; Singh, S.K. Greenhouse gas emissions from wastewater treatment plants: A case study of noida. J. Water Sustain. 2012, 2, 131–139.
[4]
Kampschreur, M.J.; Temmink, H.; Kleerebezem, R.; Jetten, M.S.M.; van Loosdrecht, M.C.M. Nitrous oxide emission during wastewater treatment. Water Res. 2009, 43, 4093–4103, doi:10.1016/j.watres.2009.03.001.
[5]
Lolito, A.M.; Wunderlin, P.; Joss, A.; Kipf, M.; Siegrist, H. Nitrous oxide emissions from the oxidation tank of a pilot activated sludge plant. Water Res. 2012, 46, 3563–3573, doi:10.1016/j.watres.2012.03.067.
[6]
Goreau, T.J.; Kaplan, W.A.; Wofsy, S.C.; McElroy, M.B.; Valois, F.W.; Watson, S.W. Production of nitrite and nitrogen oxide (N2O) by nitrifying bacteria at reduced concentrations of oxygen. Appl. Environ. Microbiol. 1980, 40, 526–532.
[7]
Dumit, M.; Gabarro, J.; Murthy, S.; Riffat, R.; Wett, B.; Colprim, J.; Chandran, K. The Impact of Post Anoxic Dissolved Oxygen Concentrations on Nitrous Oxide Emissions in Nitrification Processes. In Proceedings of the 84th Annual Water Environment Federation Technical Exhibition and Conference，, Los Angeles，CA, USA, 15–19 October 2011; Water Environment Federation: Alexandria, VA, USA, 2011.
[8]
Hu, Z.; Zhang, J.; Xie, H.; Li, S.; Wang, J.; Zhang, T. Effect of anoxic/aerobic phase fraction on N2O emission in a sequencing batch reactor under low temperature. Bioresour. Technol. 2011, 102, 5486–5491, doi:10.1016/j.biortech.2010.10.037.
[9]
Aboobakar, A.; Cartmell, E.; Stephenson, T.; Jones, M.; Vale, P.; Dotro, G. Nitrous oxide emissions and dissolved oxygen profiling in a full-scale nitrifying activated sludge treatment plant. Water Res. 2012, 47, 524–534.
[10]
Winter, P.; Pearce, P.; Colquhoun, K. Contributions of nitrous oxide emissions form wastewater treatment to carbon accounting. J. Water Clim. Chang. 2012, 3, 95–109, doi:10.2166/wcc.2012.014.
[11]
Jia, W.; Liang, S.; Zhang, J.; Ngo, H.H.; Guo, W.; Yan, Y.; Zou, Y. Nitrous oxide emission in low-oxygen simultaneous nitrification and denitrification process: Sources and mechanisms. Bioresour. Technol. 2013, doi:10.1016/j.biortech.2013.02.117.
[12]
Flores-Alsina, X.; Corominas, L.; Snip, L.; Vanrolleghem, P.A. Including greenhouse gas emissions during benchmarking of wastewater treatment plant control strategies. Water Res. 2011, 45, 4700–4710.
[13]
Snip, L. Quantifying the Greenhouse Gas Emissions of Wastewater Treatment Plants. Master’s Thesis, Department of Agrotechnology and Food Science，Wageningen University, Wageningen, The Netherland, 2010.
[14]
Rodriguez-Garcia, G.; Hospido, A.; Bagley, D.M.; Moreira, M.T.; Feijoo, G. A methodology to estimate greenhouse gases emissions in Life Cycle Inventories of wastewater treatment plants. Environ. Impact Assess. Rev. 2012, 37, 37–46, doi:10.1016/j.eiar.2012.06.010.
[15]
Corominas, L.; Flores-Alsina, X.; Snip, L.; Vanrolleghem, P.A. Comparison of different modeling approaches to better evaluate greenhouse gas emissions from whole wastewater treatment plants. Biotechnol. Bioeng. 2012, doi:10.1002/bit.24544.
[16]
Yu, R.; Kampschreur, M.J.; van Loosdrecht, M.C.M.; Chandran, K. Mechanisms and specific directionality of autotrophic nitrous oxide and nitric oxide generation during transient anoxia. Environ. Sci. Technol. 2010, 44, 1313–1319, doi:10.1021/es902794a.
[17]
Wunderlin, P.; Lehmann, M.F.; Siegrist, H.; Tuzson, B.; Joss, A.; Emmenegger, L.; Mohn, J. Isotope signatures of N2O in a mixed microbial population system: Constraints on N2O producing pathways in wastewater treatment. Environ. Sci. Technol. 2013, 47, 1339–1348.
[18]
Zhang, T.T.; Zhang, J.; Yang, F.; Xie, H.J.; Hu, Z.; Li, Y.R. Effect of temperature on pollutant removal and nitrous oxide emissions of wastewater nitrogen removal system. US Natl. Cent. Biotechnol. Inf. 2012, 33, 1283–1287.
[19]
Law, Y.; Lant, P.; Yuan, Z. The effect of pH on N2O production under aerobic conditions in a partial nitritation system. Water Res. 2011, 45, 5934–5944, doi:10.1016/j.watres.2011.08.055.
[20]
Zhu, X.; Chen, Y.; Chen, H.; Li, X.; Peng, Y.; Wang, S. Minimizing nitrous oxide in biological nutrient removal from municipal wastewater by controlling copper ion concentrations. Appl. Microbiol. Biotechnol. 2013, 97, 1325–1334, doi:10.1007/s00253-012-3988-1.
[21]
Daelman, M.R.J.; van Voorthuizen, E.M.; van Dongen, L.G.J.M.; Volcke, E.I.P.; van Loosdrecht, M.C. Methane and nitrous oxide emissions from municipal wastewater treatment—Results from a long-term study. Water Sci. Technol. 2013, 67, 2350–2355, doi:10.2166/wst.2013.109.
[22]
Shaw, A.R.; Ko, S.-H. Gaseous emissions from wastewater facilities. Water Environ. Res. 2012, 84, 1325–1331, doi:10.2175/106143007X1340727513.
[23]
Hiatt, W.C.; Grady, C.P.L., Jr. Application of the activated sludge model for nitrogen to elevated nitrogen conditions. Water Environ. Res. 2008, 80, 2134–2144, doi:10.2175/106143008X304767.
[24]
Nopens, I.; Benedetti, L.; Jeppsson, U.; Pons, M.-N.; Alex, J.; Copp, J.B.; Gernaey, K.V.; Rosen, C.; Steyer, J.-P.; Vanrolleghem, P.A. Benchmark simulation model No 2: Finalisation of plant layout and default control strategy. Water Sci. Technol. 2010, 62, 1967–1974, doi:10.2166/wst.2010.044.
[25]
Vanrolleghem, P.A.; Gillot, S. Robustness and economic measures as control benchmark performance criteria. Water Sci. Technol. 2002, 45, 117–126.
[26]
Haemelinck, S. Evaluatie van sturingsalgoritmen voor de verwijdering van stikstof uit afvalwater (Evaluation of Control Algorithms for Nitrogen Removal from Wastewaters). Engineers Thesis, Ghent University, Gent, Belgium, 2000.
[27]
Yuan, L.M.; Zhang, C.Y.; Yan, R.; Zhao, G.Z.; Tian, L.J.; He, Z.X.; Liu, H.; Zhang, Y.Q. Advanced wastewater treatment under different dissolved oxygen conditions in an innovative step-feed process. Adv. Mater. Res. 2012, 383–390, 3707–3712.
[28]
Coen, F.; Vanderhaegen, B.; Boonen, I.; Vanrolleghem, P.A.; van Eyck, L.; van Meenen, P. Nitrogen removal upgrade of a wastewater treatment plant within existing reactor volumes: A simulation supported scenario analysis. Water Sci. Technol. 1996, 34, 339–346.
[29]
Kessler, R. Stormwater strategies cities prepare aging infrastructure for climate change. Environ. Health Perspect. 2011, 119, 516–519.
[30]
Sobańtka, A.P.; Zessner, M.; Rechberger, H. Extension of statistical entropy analysis to chemical compounds. Entropy 2012, 14, 2413–2426, doi:10.3390/e14122413.
[31]
Sobańtka, A.P.; Thaler, S.; Zessner, M.; Rechberger, H. Extended statistical entropy analysis for the evaluation of nitrogen budgets in Austria. Int. J. Environ. Sci. Technol. 2013, doi:10.1007/s13762-013-0401-2.
[32]
Sobańtka, A.P.; Rechberger, H. Extended statistical entropy analysis (eSEA) for improving evaluation of wastewater treatment plants (WWTPs). Water Sci. Technol. 2013, 67, 1051–1057.
[33]
Ahn, J.H.; Kim, S.; Park, H.; Rahm, B.; Pagilla, K.; Chandran, K. N2O emissions from activated sludge processes, 2009–2009: Results of a national monitoring survey in the United States. Environ. Sci. Technol. 2010, 44, 4505–4511.
[34]
Vanrolleghem, P.A.; Jeppsson, U.; Cartensen, J.; Carlsson, B.; Olsson, G. Integration of wastewater treatment plant design and operation—A systematic approach using cost functions. Water Sci. Technol. 1996, 34, 159–171.
[35]
Tyagi, V.K.; Chopra, A.K.; Durgapal, N.C.; Kuar, A. Evaluation of daphnia magna as an indicator of toxicity and treatment efficacy of municipal sewage treatment plant. J. Appl. Sci. Environ. Manag. 2007, 11, 61–67.
[36]
Heijungs, R.; Guinée, J.B.; Huppes, G.; Lankreijer, R.M.; Udo de Haes, H.A.; Sleeswijk, A.W. 1992 Environmental Life Cycle Assessment of Products—Backgrounds; Centre of Environmental Science: Leiden, The Netherlands, 1992.
[37]
Goedkoop, M.; Spriensma, R. The Eco-Indicator 99 A Damage Oriented Method for Life Cycle Impact Assessment; PRé Consultants B.V.: Amersfoort, The Netherlands, 2000.
[38]
Guinée, J.B.; Gorée, M.; Heijungs, R.; Huppes, G.; Kleijn, R.; de Koning, A.; van Wegener Oers, L.; Sleeswijk, A.; Suh, S.; Udo de Haes, H.A.; et al. 2002 Handbook on Life Cycle Assessment. Operational Guide to the ISO Standards. I: LCA in Perspective. IIa: Guide. IIb: Operational Annex. III: Scientific Background; Kluwer Academic Publishers: Dordrecht, The Netherlands, 2002; p. 692. ISBM:1-4020-0228-9.
[39]
Pennington, D.W.; Margni, M.; Amman, C.; Jolliet, O. Spatial versus non-spatial multimedia fate and exposure modeling: Insights for Western Europe. Environ. Sci. Technol. 2005, 39, 1119–1128, doi:10.1021/es034598x.
[40]
Pennington, D.W.; Margni, M.; Payet, J.; Jolliet, O. Risk and regulatory hazard based toxicological effect indicators in Life Cycle Assessment (LCA). Hum. Ecotoxicol. Risk Assess. J. 2006, 12, 450–475, doi:10.1080/10807030600561667.
[41]
Rechberger, H.; Brunner, P.H. A new, entropy based method to support waste and resource management decisions. Environ. Sci. Technol. 2002, 34, 809–816, doi:10.1021/es010030h.
[42]
Shannon, C.E. A mathematical theory of communication. Bell Syst. Technol. J. 1948, 27, 623–656, doi:10.1002/j.1538-7305.1948.tb00917.x.
[43]
Tai, S.; Goda, T. Entropy analysis of water and wastewater treatment processes. Int. J. Environ. Stud. 1985, 25, 13–21, doi:10.1080/00207238508710208.
[44]
Larsen, T.; Gujer, W. The concept of sustainable urban water management. Water Sci. Technol. 1997, 35, 3–10, doi:10.1016/S0273-1223(97)00179-0.
[45]
Kampschreur, M.J.; van der Star, W.R.L.; Wielders, H.A.; Mulder, J.W.; Jetten, M.S.M.; van Loosdrecht, M.C.M. Dynamics of nitric oxide and nitrous oxide emissions during full-scale reject water treatment. Water Res. 2008, 42, 812–826, doi:10.1016/j.watres.2007.08.022.
[46]
Verordnung des Bundesministers für Land-und Forstwirtschaft, Umwelt und Wasserwirtschaft über die Festlegung des ？kologischen Zustandes für Oberfl？chengew？sser Teil II (Austrian Quality Objective Ordinance—Ecological Status of Surface Waters). Austrian Ministry of Agriculture, Forestry, Environment and Water: Vienna, Austria, 2010.
[47]
Berenzen, N.; Schulz, R.; Liess, M. Effects of chronic ammonium and nitrite contamination on the macroinvertebrate community in running water microcosms. Water Res. 2001, 35, 3478–3482, doi:10.1016/S0043-1354(01)00055-0.
[48]
Camargo, J.A.; Alonso, A.; Salamanca, A. Nitrate toxicity to aquatic animals: A review with new data for freshwater invertebrates. Chemosphere 2005, 58, 1255–1267, doi:10.1016/j.chemosphere.2004.10.044.
[49]
Carpenter, S.R.; Lathrop, R.C. Probabilistic estimate of a threshold for eutrophication. Ecosystems 2008, 11, 601–613, doi:10.1007/s10021-008-9145-0.
Hannas, B.R.; Das, P.C.; Li, H.; LeBlanc, G.A. Intracellular conversion of environmental nitrate and nitrite to nitric oxide with resulting developmental toxicity to the crustacean daphnia magna. PLoS One 2010, 5, doi:10.1371/journal.pone.0012453.
[52]
Hickey, C.W.; Martin, M.L. A Review of Nitrate Toxicity to Freshwater Aquatic Species. Report No. R09/57; Environment Canterbury: Canterbury, UK, 2009.
[53]
De Koekkoek, E. Die ？kotoxikologische Ableitung von PNES-Werten für Ammoniak und Nitrit für ？sterreichische Oberfl？chengew？sser (Ecotoxicological Derivation of PNEC-Values for Ammonia and Nitrite for Austrian Surface Waters); Bundessparte Industrie der WKO: Wien, Austria, 2005.
