Effect of Seasonal Variation on Performance of Conventional Wastewater Treatment System

Chebor Joel^1, , Ezekiel K. kiprop¹ and Lizzy A. Mwamburi¹

¹Department of Biological Sciences, University of Eldoret, Eldoret, Kenya

Cite this paper:
Chebor Joel, Ezekiel K. kiprop and Lizzy A. Mwamburi. Effect of Seasonal Variation on Performance of Conventional Wastewater Treatment System. Journal of Applied & Environmental Microbiology. 2017; 5(1):1-7. doi: 10.12691/jaem-5-1-1

Abstract

Many studies have focused on wastewater treatment however, little attention has been given to effect of seasonal variation to wastewater treatment. The purpose of this study was to determine the seasonal differences of wastewater treatment that employs screens, trickling filters and oxidation ponds. This was achieved by sampling and analyses of water samples from four different points during the dry and wet seasons of the year 2013. Water samples were taken from influent point, primary pond effluent, trickling filter effluent and final effluent. Gravimetric method was used in determining Total Suspended Solids (TSS) and Total Dissolved Solids (TDS). The BOD₅ technique and the COD digestion method were used for determination of Biological Oxygen Demand (BOD) and Chemical Oxygen Demand (COD) respectively while the temperature, pH and conductivity were measured using respective meters. Analysis of Variance showed that there was significant difference (p < 0.05) in all the parameters quantified at all the points of treatment during the two seasons. The results showed that BOD and COD both reduced from one point to the next during the two seasons of study. The TSS levels increased after primary pond effluent undergoing treatment at the trickling filter and the temperature also increased after the trickling filter effluent undergoing treatment at oxidation ponds. The levels of conductivity and TDS decreased from one treatment stage to the next during dry season but during the wet season the levels of these parameters increased from one stage to the next except that the levels reduced after the primary pond effluent underwent treatment at the trickling filter. The various stages of wastewater treatment plant under study were effective during the two seasons however, wet season recorded lower figures for most of the parameters.

Keywords:
effluent physicochemical parameters points wastewater treatment seasonal variation

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References:

[1]	Ramesh, KJ. Environmental microbiology. Chania: MJP publishers (2004).
[2]	Akpor OB, Muchie B. Environmental and public health implications of wastewater quality. African Journal of Biotechnology. 2011 Mar 28; 10(13): 2379-87.
[3]	UNEP, Green Hills, Blue Cities: An Ecosystems Approach to Water Resources Management for African Cities. A Rapid Response Assessment, UNEP, Nairobi 2011
[4]	Wakelin, S.A.; Colloff, M.J.; Kookanal, R.S. Effect of wastewater treatment plant effluent on microbial function and community structure in the sediment of a freshwater stream with variable seasonal flow. Appl. Environ. Microbiol. 2008, 74, 2659-2668.
[5]	Fatta, D., Anayiotou, S. and, I. An overview of the Water and Wastewater Management Practices in Cyprus, In: IWA Specialty Conference,Wastewater reclamation and reuse for sustainability, 2005 Jeju, Korea.
[6]	Chandra R, Singh S, Raj A. Seasonal bacteriological analysis of Gola river water contaminated with pulp paper mill waste in Uttaranchal, India. Environmental monitoring and assessment. 2006 Jul 1;118(1-3):393-406.
[7]	Eaton, Andreio D., Lenore S. Clesceri, and A. E. Greenburg. “Standard methods for the examination of water and wastewater. Baltimore, Maryland, American Public Health Association.” (1995).
[8]	Mara, D, and International Water Association. Design manual for waste stabilization ponds in India. IWA, 2003.
[9]	IETC – UNEP. Environmentally sound technologies for wastewater and storm water management: 2002.
[10]	Prescott, LM.; Herley, JP.; and Klein, DA. Fifth edition Microbiology. McGraw – Hill (2002).
[11]	Mackne, C., Lake, A., Casey, P., and Solomon, C. Trickling filters achieving filtration factsheet; 1998
[12]	Martinko, M., and D. Clark. Biology of Microorganisms: Pearson International Edition. Pearson Publishers, 2009.
[13]	Environmental Protection Agency (EPA). Wastewater technology fact sheet trickling filters. EPA 832 – F – 00 – 014; 2000.
[14]	Pena, MVand Mara, D.Waste stabilization ponds. University of Leeds, Leeds, UK; 2004.
[15]	USEPA., Wastewater technology factsheet: facultative lagoons, US Environmental Protection Agency; 2002 b.
[16]	Shilton, Andy, ed. Pond treatment technology. IWA publishing, 2005.
[17]	The water treatment. Maturation ponds, viewed online 02-02-2012 Http:thewater/treatments.com/wastewater-sewage-treatment/maturation-ponds; 2012.
[18]	Mara DD, Pearson HW. Design manual for waste stabilization ponds in Mediterranean countries. Lagoon Technology International Ltda; 1998.
[19]	Osada T, Kuroda K, Yonaga M. Reducing nitrous oxide gas emissions from fill-and-draw type activated sludge process. Water Research. 1995 Jun 30; 29(6): 1607-8.
[20]	Wicht H, Beier M. N2O-Emissionen aus nitrifizierenden und denitrifizierenden Kläranlagen. Korrespondenz Abwasser. 1995 Mar; 42(3): 404-6.
[21]	Tallec, G., Garnier, J., Billen, G., Gousailles, M. Nitrous oxide emissions from secondary activated sludge in nitrifying conditions of urban wastewater treatment plants: effect of oxygenation level. Wat Res, 2006 a 40 (15), 2972-2980.
[22]	Kampschreur MJ, van der Star WR, Wielders HA, Mulder JW, Jetten MS, van Loosdrecht MC. Dynamics of nitric oxide and nitrous oxide emission during full-scale reject water treatment. Water Research. 2008 Feb 29; 42(3): 812-26.
[23]	Environmental Protection Agency (EPA). Guidelines for wastewater reuse. September EPA / 625 / R – 04 / 08; 2004.
[24]	Tortora, G., Funke, B., Case C. Microbiology: An introduction. San Francisco: Benjamin Cummings; 2010.
[25]	Reed SC, Crites RW, Middlebrooks EJ. Natural systems for waste management and treatment. McGraw-Hill, Inc.; 1995.
[26]	Atlas RM. Microorganisms in our world. Mosby-Year Book, Inc.; 1995.
[27]	Monney, I., Odai, S. N., Buamah, R., Awuah, E., and Nyenje, P.M. Environmental impacts of wastewater from urban slums: Case study – old Fadama, Accra. International Journal ofdevelopment and sustainability. 2013. vol. 2 (2): 711-728.