Study on Dynamics Model of Biodegration Property of Organic Matter in Aerobic Thermophilic Composting Reactor for Sanitary Disposal of Human Feces

Abstract:

Aerobic composting is a method for sanitary disposal of human feces as has been used in bio-toilet systems. In this study, batch experiments were conducted using a closed aerobic composting reactor with sawdust as the bulky matrix to simulate the condition of a bio-toilet for sanitary disposal of human feces. Attention was paid to the Biodegration property of organic matter. Under a controlled condition of temperature(60°C), moisture content(60%), and continuous air supply, more than 70% fecal organic removal was obtained in a two-week composting period. Based on assumptions that the organic matter of feces was invided into two parts included degradation and undegradation, the organic matter’s biochemical degradation of similar level 1 dynamics model can build. Using the experimental data of composting reaction under thermophilic composting conditions, calculated out respectively reaction kinetics constants 0.4413. Thermophilic composting could be considered to reach more than 70% fecal organic removal, shortening maturity period of compost. The similar level 1 dynamics model improve design of composting reactor and use of bio-toilet.

• Periodical: Advanced Materials Research (Volume 281)
• Pages: 291-295
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.281.291
• Online since: July 2011
• Authors: Fan Bai, Xiao Chang Wang
• Keywords: Aerobic Thermophilic Composting, Composting Reactor, Human Feces

References

[1] Lopez-Zavala M A and Funamizu N: Water Science & Technology , Vol. 53 Iss. 9(2006), pp.55-61.

[2] Wang X C and Jin P K: Water Science & Technology , Vol. 53 Iss. 9(2006), pp.35-44.

[3] Kitsui T and Terazawa M. Bio-toilet, Environmentally friendly toilets for the 21st century. in: the 10th International Symposium on Wood and Pulping Chemistry (ISWPC). 1999. Yokohama. Japan.

[4] Lopez-Zavala M A, Funamizu N, and Takakuwa T: Water Research , Vol. 38 Iss. 9(2004), pp.2406-2416.

[5] Hanajima D, et al.: Bioresource Technology , Vol. 97 Iss. 14(2006), pp.1616-1630.

[6] Vinnerås B: Bioresource Technology , Vol. 98 Iss. 17(2007), pp.3317-3321.

[7] Wang H B and Wang X C. Chinese Journal of Environmental Engineering , Iss. 01(2008), pp.97-100.

[8] Eklind Y and Kirchmann H: Bioresource Technology , Vol. 74 Iss. 2(2000), pp.115-124.

[9] Eklind Y and Kirchmann H: Bioresource Technology , Vol. 74 Iss. 2(2000), pp.125-133.

[10] Sánchez-Monedero M A, et al.: Bioresource Technology , Vol. 78 Iss. 3(2001), pp.301-308.

[11] Wang H B and Wang X C. Environmental Science & Technology , Iss. 03(2009), pp.122-125.

[12] Lopez-Zavala M A, Funamizu N, and Takakuwa T: Bioresource Technology , Vol. 96 Iss. 7(2005), pp.805-812.

[13] Hotta S, Noguchi T, and Funamizu N: Water Science & Technology , Vol. 55 Iss. 7(2007), pp.181-186.

[14] Hotta S and Funamizu N: Bioresource Technology , Vol. 98 Iss. 17(2007), pp.3412-3414.

DOI: 10.1016/j.biortech.2006.10.045

[15] Huang G F, J.W. Wong, and Wu Q T: Waste Management , Vol. 24 Iss. 8(2004), pp.805-813.

[16] Zhu N W: Bioresource Technology , Vol. 98 Iss. 1(2007), pp.9-13.

[17] Wang H B, Sun Y and Wang X C. Journal of Safety and Environmental Iss. 02(2008), pp.43-46.

[18] WANG H. B. and Wang X C: Environmental Science & Technology (in Chinese) , Vol. 32 Iss. 3(2009), pp.122-125.

[19] Tiquia S M, Tama N F Y, and H.I. J.: . Environmental Pollution , Vol. 93 Iss. 3(1996), pp.249-256.

[20] National General Administration of Environmental Protection: Methods for Monitoring and Analysis of Water and Wastewater(in Chinese) (huanjingEnvironmental Science Press of China, Beijing, 2002).

[21] National General Administration of Environmental Protection, Patent (2007).