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Dewatering of Source-separated Human Urine for Nitrogen Recovery by Membrane Distillation
http://hdl.handle.net/20.500.12678/0000005323
http://hdl.handle.net/20.500.12678/0000005323f3b362f2-aaa2-424b-b34b-f485eee46263
cb43cd1b-711f-48b3-ac1f-1b839df9f262
Name / File | License | Actions |
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Publication type | ||||||
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Journal article | ||||||
Upload type | ||||||
Publication | ||||||
Title | ||||||
Title | Dewatering of Source-separated Human Urine for Nitrogen Recovery by Membrane Distillation | |||||
Language | en | |||||
Publication date | 2016-04-01 | |||||
Authors | ||||||
Lat Lat Tun | ||||||
Dawoon Jeong | ||||||
Seongpil Jeong | ||||||
Kyungjin Cho | ||||||
Seockheon Lee | ||||||
Hyokwan Bae | ||||||
Description | ||||||
The nitrogen content of a synthetic ammonia wastewater was concentrated using direct contact membrane distillation (DCMD). The ratio of transferred ammonia to water (i.e., specific ammonia transfer: SAT) was controlled by operational conditions. With 20 °C on the permeate side, and a high temperature of 70 °C on the feed side, the process exhibited low SAT values for PTFE/PP (PTF045LD0A), PTFE/PP (TF- 450), and PVDF (HVHP-14250) membranes. This was because the increase in water flux (424 L/m2 h) was greater than that of ammonia transfer. A positive relationship between SAT and free ammonia concentration was identified under different total ammoniacal nitrogen concentration and pH. The acidification pretreatment to pH 5 led to further reduction in the SAT value (as low as 6.91!10"5 g-N/g- H2O). As a practical application, the dewatering process of source-separated human urine by DCMD required an additional filtration step to prevent fouling, but the filtration had an insignificant effect on the SAT. For the acidified and filtered source-separated human urine, total ammoniacal nitrogen was successfully concentrated with a low SAT value (o2.06!10"3 g-N/g-H2O). |
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Keywords | ||||||
Human urine, Ammonia enrichment, Membrane distillation, Acidification | ||||||
Journal articles | ||||||
Journal of Membrance Science | ||||||
pp 13_20 | ||||||
512 |