Effect of Environmental Factors on Water and Excreta Temperature in Pipes with Various Materials and Configurations

ผู้แต่ง

  • Patchareeya Jaipakdee Faculty of Public Health, Khon Kaen University
  • Rittirong Junggoth Faculty of Public Health, Khon Kaen University
  • Somsak Pitaksanurat Faculty of Public Health, Khon Kaen University
  • Anthony Charles Kuster Faculty of Public Health, Khon Kaen University
  • Puek Tantriratna Faculty of Public Health, Khon Kaen University

คำสำคัญ:

Human Excreta, Pipes, Solar Radiation

บทคัดย่อ

Abstract

Introduction: Environmental Factors such as light intensity, ambient temperature, and humidity can affect to the thermophilic compostion of source-separated faces at temperatures >50°C for at least one week to ensure safe sanitation. (WHO; 2006) Thus, an experiment was devised to study how to achieve these sanitizing temperatures within the pipes of various materials, exposed to ambient environmental conditions in northeast Thailand.

Aims: 1) To compare the internal temperature of four experimental materials: PVC, iron, stainless steel and aluminum in a 3x2 experimental configuration: three pipe configurations- unpainted, painted black, and painted black with parabolic reflector and two media- water and excreta; 2) To study the relationship between environmental factors, including ambient temperature, light intensity, and humidity and the internal temperature of the media.

Methods: There were two experiments from July 2017 to January 2018. The first experiment used water as a media. The second experiment used excreta as a media. Each experiment had three groups of pipes, each group with four pipes of different materials. The four pipe materials were PVC, iron, stainless steel, and aluminum. The three groups used a different configuration: unpainted, painted black, and painted black with a parabolic reflector. Each pipe was 3 inches diameter, 1 meter in length, tilted 15 degrees towards the southern horizon, and placed at a height 0.65 meters off the ground. Solar parabolic troughs were made from aluminum sheets (1.2 x 1.52 m) using shape from Surawattanawan & Limboonrung (2011). The temperature in each experimental unit was measured every hour during the daytime (09.00 to 17.00) and ambient temperature, light intensity humidity and cloud cover were collected also.

Results: With water as a media, a maximum internal temperature at 80°C was found in iron painted black with a parabolic reflector, with an average temperature at 39.8±13.2 °C (mean±S.D.). The ambient air

 

temperature had the highest correlation with the temperature of experimental units (r = 0.51 in unpainted aluminum) followed by light intensity (r=0.22 in unpainted PVC).

With human excreta as a media, a maximum temperature at 71°C was found in aluminum painted black with a parabolic reflector, with an average temperature at 44.40±7.03°C. Light intensity had highest correlation with temperature of experimental units (r=0.27 in aluminum with parabolic reflector) follow by ambient temperature (r=0.19 in iron with parabolic reflector).

Conclusion: Solar radiation can increase temperatures of water and excreta to levels that may inactivate very strong pathogens. Iron, aluminum, and stainless steel, painted black with the addition of a parabolic reflector, could achieve temperatures higher than 65 °C in sunny weather.

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References

Austin, L. M., & Cloete, T. E. (2008). Safety aspects of handling and using fecal material from urine-diversion toilets: A field investigation. Water Environment Research, 80(4), 308-315.
Beauford, B. W., & Westerberg, S. C. (1969). Survival of human pathogens in composted sewage. Applied Microbiology, 18, 994-1001.
de Bertoldi, M. (1998). Composting in the European Union. BioCycle, 39, 74-75.
Echaubard, P., León, T., Suwanatrai, K., Chaiyos, J., Kim, C. S., Mallory, F. F., et al. (2017). Experimental and modelling investigations of Opisthorchis viverrini miracidia transmission over time and across temperatures: Implications for control. International Journal for Parasitology, 47(5), 257-70.
Feachem, R. G., Bradley, D. J., Garelick, H., & Mara, D. D. (1983). Sanitation and disease: Health aspects of excreta and wastewater management, World Bank studies in water supply and sanitation. New York: John Wiley and Sons.
Fleisher, J. M., Kay, D., Wyer D., & Godfree, A. F. (1998). Estimates of the severity of illnesses associated with bathing in marine recreational waters contaminated with domestic sewage. International Journal of Epidemiology, 27, 722-726.
Gantzer, C., Gaspard, P., Galvez, L., Huyard, A., Dumouthier, N., & Schwartzbrod, J. (2001). Monitoring of bacterial and parasitological contamination during various treatment of sludge. Water Research, 35(16), 3763-3770.
Haile, R. W., Witte, J. S., Gold, M., Cressey, R., McGee, C., Millikan, R. C., et al. (1999). The health effects of swimming in ocean water contaminated by storm drain runoff. Epidemiology, 10, 355-363.
Hinkle, D. E., Wiersma, W., & Jurs, S. G. (1998). Applied statistics for the behavioral sciences (4th ed.). Boston: Houghton Mifflin.
Kay, D., Fleisher, J. M., Godfree, A. F., Jones, F., Salmon, R. L., Shore, R., et al. (1994). Predicting likelihood of gastroenteritis from sea bathing: Results from randomized exposure. Lancet, 344, 905-909
Houdkova, L., Boran, J., Elsäßer, T., & Stehlik, P. (2007). Importance of experimental measurements and simulations for “sludge-to-energy” systems. Computational Methods and Experimental Measurements XIII, 465-474.
Madigan, T. M., & Martinko, M. J. (2006). Brock biology of microorganisms. 11th ed. Upper Saddle River, NJ: Pearson Prentice-Hall.
Moe, C. L., & Rheingans, R. D. (2006). Global challenges in water, sanitation and health. Journal of Water and Health, (Suppl 04), 41-57.
Morishita, K., Komiya, Y., & Matsubayshi, H. (1972). Process of medical parasitology in Japan. Tokyo: Megureo Paraitological Museum.
Niwagaba, C. B. (2009). Treatment technologies for human faeces and urine. Retrieved October 25, 2017, from https://pub.epsilon.slu.se/2177/1/niwagaba_c_091123.pdf
Peasey, A. (2000). Health aspects of dry sanitation with waste reuse. Leicestershire, UK: Loughborough University.
Surawattanawan, P., & Limboonrung, T. (2011) Mathematical modeling and the design of solar parabolic trough. Retrieved October 25, 2017, from https://www.acat.or.th/download/ acat_or_th/journal-16/16%20-%2012.pdf
Padakan, R., & Radagan, S. (2010). A study of the factors that affect the efficiency of hot water systems. Engineering Journal Kasetsart, 22(70), 96-109.
Schönning, C., Stenström, T. A. (2004). Guidelines for the safe use of urine and faeces in ecological sanitation. Sweden: Stockholm Environment Institute.
Shuval, H. I., Gunnerson, C. G., & Julins, D. S. (1981). Night–soil composting: Propriate technology for water supply and sanitation volume 10. Washington, DC: World Bank.
Strauss, M., & Blumenthal, U. J. (1990). Human waste in agriculture and aquaculture: Utilization practices and health perspectives. Switzerland: International Reference Center for Waste Disposal.
USEPA. (1999). Control of pathogens and vector attraction in sewage sludge. Cincinnati, OH: United States Environmental Protection Agency, Office of Research and Development, National Risk Management Laboratory, Center for environmental Research Information,
University of Corporation for Atmosheric Research [UCAR]. 2019. Conduction. Retrieved June 18, 2019, from https://scied.ucar.edu/conduction
Vinnerås, B., & Jönsson, H. (2007). Handling systems for reuse of urine and faecal matter from urban areas. Sweden: Department of Agricultural Engineering, Sveriges Lantbruksuniversitet.
World Health Organization [WHO]. (2016). Soil-transmitted helminth infection. Retrieved October 25, 2017, from https://www.who.int/mediacentre/factsheets/fs366/en/
World Health Organization [WHO]. (2006). Guidelines for the safe use of wastewater, excreta and greywater: Volume 4, excreta and greywater use in agriculture. Geneva: The Organization.
World Health Organization [WHO]. (2002). Sanitation. Retrieved October 25, 2017, from https://www.who.int/water_sanitation_health/hygiene/emergencies/em2002chap8.pdf
Wichuk, K. M., & McCartney, D. (2007). A review of the effectiveness of current time temperature regulations on pathogen inactivation during composting. Journal of Environmental Engineering Science, 6, 573-586.
Winker, M., Vinnerås, B., Muskolus, A., Arnold, U., & Clemens, J. (2009). Fertiliser products from new sanitation systems: Their potential values and risks. Bioresource Technology, 100(18),
4090-4096.

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2019-07-31