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Thermoelectric energy harvesting for a solid waste processing toilet

Publication ,  Conference
Stokes, CD; Baldasaro, NG; Bulman, GE; Stoner, BR
Published in: Proceedings of SPIE - The International Society for Optical Engineering
January 1, 2014

Over 2.5 billion people do not have access to safe and effective sanitation. Without a sanitary sewer infrastructure, self-contained modular systems can provide solutions for these people in the developing world and remote areas. Our team is building a better toilet that processes human waste into burnable fuel and disinfects the liquid waste. The toilet employs energy harvesting to produce electricity and does not require external electrical power or consumable materials. RTI has partnered with Colorado State University, Duke University, and Roca Sanitario under a Bill and Melinda Gates Foundation Reinvent the Toilet Challenge (RTTC) grant to develop an advanced stand-alone, self-sufficient toilet to effectively process solid and liquid waste. The system operates through the following steps: 1) Solid-liquid separation, 2) Solid waste drying and sizing, 3) Solid waste combustion, and 4) Liquid waste disinfection. Thermoelectric energy harvesting is a key component to the system and provides the electric power for autonomous operation. A portion of the exhaust heat is captured through finned heat-sinks and converted to electricity by thermoelectric (TE) devices to provide power for the electrochemical treatment of the liquid waste, pumps, blowers, combustion ignition, and controls. © 2014 SPIE.

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Published In

Proceedings of SPIE - The International Society for Optical Engineering

DOI

EISSN

1996-756X

ISSN

0277-786X

Publication Date

January 1, 2014

Volume

9115

Related Subject Headings

  • 5102 Atomic, molecular and optical physics
  • 4009 Electronics, sensors and digital hardware
  • 4006 Communications engineering
 

Citation

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Stokes, C. D., Baldasaro, N. G., Bulman, G. E., & Stoner, B. R. (2014). Thermoelectric energy harvesting for a solid waste processing toilet. In Proceedings of SPIE - The International Society for Optical Engineering (Vol. 9115). https://doi.org/10.1117/12.2073696
Stokes, C. D., N. G. Baldasaro, G. E. Bulman, and B. R. Stoner. “Thermoelectric energy harvesting for a solid waste processing toilet.” In Proceedings of SPIE - The International Society for Optical Engineering, Vol. 9115, 2014. https://doi.org/10.1117/12.2073696.
Stokes CD, Baldasaro NG, Bulman GE, Stoner BR. Thermoelectric energy harvesting for a solid waste processing toilet. In: Proceedings of SPIE - The International Society for Optical Engineering. 2014.
Stokes, C. D., et al. “Thermoelectric energy harvesting for a solid waste processing toilet.” Proceedings of SPIE - The International Society for Optical Engineering, vol. 9115, 2014. Scopus, doi:10.1117/12.2073696.
Stokes CD, Baldasaro NG, Bulman GE, Stoner BR. Thermoelectric energy harvesting for a solid waste processing toilet. Proceedings of SPIE - The International Society for Optical Engineering. 2014.

Published In

Proceedings of SPIE - The International Society for Optical Engineering

DOI

EISSN

1996-756X

ISSN

0277-786X

Publication Date

January 1, 2014

Volume

9115

Related Subject Headings

  • 5102 Atomic, molecular and optical physics
  • 4009 Electronics, sensors and digital hardware
  • 4006 Communications engineering