6th International Virtual Congress (IVC-2019) And Workshop.  International E-publication: Publish Projects, Dissertation, Theses, Books, Souvenir, Conference Proceeding with ISBN.  International E-Bulletin: Information/News regarding: Academics and Research

Comparative Study of Rice Straw and Ragi Straw for the Inhibition of Algal Bloom in Fresh Water

Author Affiliations

  • 1 Civil Engineering, Alagappa Chettiar College of Engg and Tech, Karaikudi, Tamilnadu, INDIA

Int. Res. J. Biological Sci., Volume 1, Issue (6), Pages 31-37, October,10 (2012)

Abstract

In recent years, there has been an apparent increase in the occurrence of harmful algal blooms in fresh waters. In this study, it has been attempted to compare the efficiency of rice straw and ragi straw at various concentrations to inhibit algal bloom in fresh water. Algae was collected from a nearby pond, ACCET, Karaikudi, India. Rice straw was collected from rice fields, Thanjavur, India. Ragi straw was collected from Perambalur district. The experiments were carried out in five trays of same dimensions were used among which one was kept control. 2g/l of rice straw was found to inhibit the algal growth at maximum rate. This is due to the release of large amounts of chemicals during the decomposition of the straws. The amount of chemicals released during the process may be differing in various concentrations. pH value was also measured during the experiment. The decreased pH values in the treatment were due to the release of organic acids from the decomposition of rice straw and ragi straw. A possible reason behind increase in COD and change in turbidity was discussed.

References

  1. Chung J.C. and Chung P.L. Present status of Etrophication of Man-made Lakes in Korea and its Prospective control, Proceedings of the Forth International Symposium-The Etrophication and conservation of Water resources, 211-222 (1988)
  2. Steyn D.G., Poisoning of Animals by Algae on Dams and Pans, Farming in South Africa, 18, 489 (1943)
  3. Hallegraef G.M, A review of harmful algal blooms and their apparent global increase, Phycologia, 32, 79-99 (1993)
  4. Newmann J.R. and Barrett P.R.F., Control of Microcystis aeruginosa by decomposing barley straw, J. Aquatic Plant Man., 31, 301-305 (1993)
  5. Ramsdell J.S., Anderson D.M. and Glibert P.M. (Eds.), Harrness, Harmful algal research and response: a national environmental science strategy 2005-2015, Ecological Society of America, Washington, DC, 96 (2005)
  6. Dodds W.K., Boska W.W., Eitzmann J.L., Pilger T.J., Pitts K.L., Riley A.J., Schloesser J.T. and Thornbrgh D.J., Etrophication of S freshwaters: analysis of potential economic damages, Environ. Sci. Technol, 43, 12-19 (2009)
  7. Falconer I.R., Health effects associated with controlled exposures to cyanobacterial toxins, Springer press, New york, 27, 607-612 (2008)
  8. Hudnell H.K., Congressional Testimony on Freshwater Harmful Algal Blooms, U.S. House of Representatives Committee on Science and Technology, July 10 (2008)
  9. Lopez C.B., Dortch Q., Jewett E.B. and Garrison D., Scientific Assessment of Marine Harmful Algal Blooms, Interagency Working Group of Harmful Algal Blooms, Hypoxia, and Human Health of the joint Subcommittee on Ocean Science and Technology, Washington (2008)
  10. Stewart I., Seawright A.A., Shaw G.R., Cyanobacterial poisoning in Livestock, wild mammals and birds- an overview In: Hudnell, H.K., (Ed), Cyanobacterial Harmful Algal Blooms: State of Science and Press, New York, 613-638 (2008)
  11. Alam M.Z.B., Otaki M., Frmai H. and Ohgaki S., Direct and indirect inactivation of microcystis aerginosa by V- radiation, Wat. Res.,35, 1008-1014 (2001)
  12. Wetzel R.G., Limnology: Lake and River Ecosystems. Academic Press, San Diego, 836-840 (2001)
  13. Pillinger J.M., Cooper J.A. and Harding C.J., Stable free radicals from plant litter decomposing in water, Journal of Chemical Ecology, 21(5), 1001-1011 (1996)
  14. Ridge I. and Pillinger J.M., Towards understanding the nature of algal inhibitors from barley straw, Hydrobiol., 340, 301-305 (1996)
  15. Pillinger J.M., Cooper J.A. and Ridge I., Role of phenolic compounds in the analytical activity of barley straw, Journal of Chemical Ecology, 20(7), 1557-1569 (1994)
  16. Kenneth Hudnell H., In the state U.S. fresh water harmful algal blooms assessments, policy and legislation, Toxicon 55, 10241034 (2010)
  17. Everall N.C. and Lees D.R., The identification and significance of chemicals released from decomposing barley straw during reservoir algal control, Water Research, 31(3), 614-620 (1997)
  18. Harrimann R., Adamson E.A., Shelton R.G.J. and Moffett G., An assessment of the effectiveness of straw as an algal inhibitor in an plana Scottish Loch, Biocon. Sci. Tech., 287-296 (1997)
  19. Boylan J.D. and Morris J.E., Limited effects of barley straw on algae and zooplankton in a mid western pond, Lake and reservoir management, 19(3), 265-271 (2003)