Figure 1 (IMAGE)

Columbia University School of Engineering and Applied Science

Figure 1

Caption

Urine, which contains most the nitrogen excreted by humans, can be isolated at the source via dry urinals and urine-diversion toilets. Through isothermal MD, volatile ammonia in hydrolyzed urine is driven across a hydrophobic microporous membrane where it is recovered as an ammonia fertilizer product in the acidic collector stream. The remaining urine can then be discharged to the sewer.

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Ngai Yin Yip and Chanhee Boo/Columbia Engineering

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Please credit as: Ngai Yin Yip and Chanhee Boo/Columbia Engineering

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