The Role of Methanogens in Waste Water Treatment

Introduction

Filamentous methanogen. Obtained from Maryland Astrobiology Consortium, NASA, and STScI

Methanogens

Classification of the different orders of Methanogens. Obtained from http://dc344.4shared.com/doc/U1tNMdLZ/preview.html

Methanogenesis

The figure represents the main pathways of methanogenesis which convert CO2, acetate, or organic acids into methane gas. Image obtained from http://microbewiki.kenyon.edu/index.php/Black_Sea

Uses in Wastewater Treatment

This diagram shows the CDT and CSRT anaerobic reactors. Obtained from Tabatabaei et al., 2010.

This figure shows the methane fluxes from each part of the A/A/O process. Obtained from Wang et al., 2011.

Possible Environmental Impacts

Include some current research in each topic, with at least one figure showing data.

Conclusion

Overall paper length should be 3,000 words, with at least 3 figures.

References

[1]M. R.J. Daelman, E. M. van Voorthuizen, U. G.J.M. van Dongen, E. I.P. Volcke, M. C.M. van Loosdrecht. "Methane emission during municipal wastewater treatment". Water Research. 2012. Volume 46. p. 3657-3670.

[2]A.E. Johansson, A-M. Gustavsson, M.G. Oquist, B.H. Svensson. "Methane emissions from a constructed wetland treating wastewater-seasonal and spatial distribution and dependence on edaphic factors". Water Research. 2004. Volume 38. p. 3960-3970.

[3]Toprak, Hikmet. "Temperature and organic loading dependency of methane and carbon dioxide emission rates of a full-scale anaerobic waste stabilization pond". Water Research. 1995. Volume 29. p. 1111-1119.

[4]E. Uggetti, J Garcia, S. E. Lind, P. J. Martikainen, I. Ferrer. "Quantification of greenhouse gas emissions from sludge treatment wetlands". Water Research. 2012. Volume 46. p. 1755-1762.

[5]J. Wang, J. Zhang, H. Xie, P. Qi, Y. Ren, Z. Hu. "Methane emissions from a full-scale A/A/O wastewater treatment plant". Bioresource Technology. 2011. Volume 102. p. 5479-5485.

[6]M. Tabatabaei, R. A. Rahim, N. Abdullah, A-D. G. Wright, Y. Shirai, K. Sakai, A. Sulaiman, M. A. Hassan. "Importance of the methanogenic archaea populations in anaerobic wastewater treatments". Process Biochemistry. 2010. Volume 45. p. 1214-1225.

[7]Y. Wang, C. Ye, H. Yang, J. Zhang, C. Huang, B. Xie. "Methane formation in soil-plant systems treating wastewater as influenced by microbial populations". Environmental Earth Science. 2013. Volume 70. p. 1647-1652.

[8][Slonczewski, J.L., and Foster, J.W. "Microbiology: An Evolving Science". W.W. Norton and Company. 2014. Third Edition.]

Edited by student of Joan Slonczewski for BIOL 238 Microbiology, 2009, Kenyon College.