WRRC Seminar - Urine diverting toilets
March 4, 3:00pm - 4:15pmMānoa Campus, Marine Sciences Building, MSB 100
Ecological Sanitation in Urine Diverting (UD) Mode to: Conserve Water and Energy, Recover Nutrients, and Reduce Estrogen Pollution
by
Krishna Lamichhane, Graduate Researcher, University of Hawaii
Abstract:
Elevated concentrations of estrogens in natural waters pose a significant threat to public health and aquatic ecosystems. Both natural and synthetic estrogens, ubiquitous in wastewater effluents and receiving waters, have been shown to affect the endocrine systems of humans and aquatic life. The effects vary from cancer to sex reversals at levels as low as parts per trillion in sensitive organisms. Separation of urine which constitutes only about 1% of domestic sewage and contains nearly all of the excreted estrogens, potentially offers an energy-efficient way to contain and then treat these chemicals. Urine diverting toilets (UDT) can be employed to separate urine at the source. By installing a UDT, a family in the USA can realize an estimated savings of $101/y in energy, water, and nutrients and a decrease of 100 kg green house gas emissions. To remove 99% of estrogenicity in discharged waters would require approximately 12 kWh/p-y using continuous electrodialysis followed by ozonation (O3) of source separated urine. To achieve the same results by adding O3 treatment after activated sludge at existing municipal wastewater treatment plants would require 23 kWh/p-y. In addition to the environmental and economic benefits, this talk will also cover the results of a UDT acceptability study conducted in Hawaii.
Tuesday March 4, 2014, 3:00 PM, MSB 100
Event Sponsor
Water Resources Research Center, Mānoa Campus
More Information
Philip Moravcik, (808) 956-3097, morav@hawaii.edu, http://www.wrrc.hawaii.edu/spring2014seminars.shtml
Tuesday, March 19 |
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9:30am |
Graduating Student Global Seal of Biliteracy Testing
Mānoa Campus, Moore Hall 153B EWA Computer Lab
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12:00pm |
East-West Toastmasters Leadership/Public Speaking Club Meeting
Mānoa Campus, Hemenway Hall 215
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Thursday, March 21 |
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12:00pm |
NDPTC Webinar - Disaster Planning for Vulnerable Populations
Mānoa Campus, Online
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Monday, March 25 |
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12:30pm |
Linguistics Final Oral
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Wednesday, March 27 |
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9:00am |
Community Dialogues: “Microaggressions” with Jessica Lau
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11:00am |
Community Dialogues: “Microaggressions” with Jessica Lau
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12:00pm |
Law School Admissions Zoom Information Session
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3:00pm |
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Thursday, March 28 |
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9:00am |
PI-CASC Graduate Student Symposium
Mānoa Campus, Inmin Conference Room, East West Center
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9:30am |
Mathematics Final Oral
Mānoa Campus, George 213
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12:00pm |
Lunchbreak Mindfulness Series: The Spring Refresh
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2:00pm |
ASUHWO General Senate Meeting
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Gaza is Palestine: On Bakers and Storytellers
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Mānoa Campus, 3114 Paliuili st
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5:00pm |
Part Time JD Flex and Law School Admissions - Zoom Information Session - March
Mānoa Campus, Virtual
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7:00pm |
Navigators Bible Study
Mānoa Campus, Honolulu Christian Church 2207 Oahu Ave, Honolulu, HI 96822
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Friday, March 29 |
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3:00pm |
Business Administration Final Oral
Mānoa Campus, Zoom
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Saturday, March 30 |
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7:30pm |
JAVANESE GAMELAN CONCERT
Mānoa Campus, Music Department Barbara Smith Amphiteater
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Sunday, March 31 |
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12:00pm |
Kalo Grant 3rd Round Application
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