2026-09-22T08:23:46Z https://www.ideals.illinois.edu/oai-pmh

oai:www.ideals.illinois.edu:2142/108630 2023-07-11 col_2142_5131 col_2142_14770 com_2142_5130 com_2142_3518 com_2142_234

Fertilizer Co-location Guest, Jeremy S Echevarria, Desarae Monique 2020-10-07T22:44:42Z 2020-10-07T22:44:42Z 2022-10-07T22:44:53Z 2020-07-21 2020-08 Resource recovery from human excreta can advance circular economies while improving access to sanitation and renewable agricultural inputs. Proximity between human-derived nutrient supply and crop nutrient demands influence how nutrients are recovered in order to be a competitive alternative to synthetic fertilizers. For 107 countries, we analyze the co-location of human-derived nutrients and crop demands for nitrogen, phosphorus, and potassium. To characterize co-location patterns, we fit data for each country to a generalized logistic function. We identified three typologies: (i) dislocated nutrient production and demand resulting from high density agriculture (with low population density) and nutrient islands (e.g., high density cities) requiring nutrient concentration and transport; (ii) co-located nutrient production and demand enabling local reuse; and (iii) countries spanning the continuum between these two extremes. Finally, we explored connections between these typologies and country-specific contextual characteristics via principal component analysis (PCA) and found the human development index (HDI) was a strong indicator of the country’s affiliated typology based on its nutrient landscape. By providing a generalizable, quantitative framework for characterizing the co-location of excreted nutrients and agricultural needs, these typologies can advance resource recovery by informing resource recovery strategies, investment, and enabling policies. Submission published under a 24 month embargo labeled 'U of I Access', the embargo will last until 2022-08-01 The student, Desarae Echevarria, accepted the attached license on 2020-07-20 at 15:57. The student, Desarae Echevarria, submitted this Thesis for approval on 2020-07-20 at 16:18. This Thesis was approved for publication on 2020-07-21 at 11:15. DSpace SAF Submission Ingestion Package generated from Vireo submission #15699 on 2020-10-02 at 15:33:57 Made available in DSpace on 2020-10-07T22:44:42Z (GMT). No. of bitstreams: 7 ECHEVARRIA-THESIS-2020.pdf: 1282432 bytes, checksum: b55d3de6be31423ac1308aafd2d1891b (MD5) NPK_PCA_results_92countries.xlsx: 32263 bytes, checksum: 7212ac16b662915bf009a50cee6b11d5 (MD5) Nitrogen_Fitting_Parameters_107countries.xlsx: 33735 bytes, checksum: 9fc166ce8f5eec99421c7519ac7433fd (MD5) Phosphorous_Fitting_Parameters_107countries.xlsx: 33586 bytes, checksum: 8923d449214e2fa75dcfbcc953aa0578 (MD5) Potassium_Fitting_Parameters_107countries.xlsx: 33490 bytes, checksum: 4331a1bc597c464707d6c9a577f7960e (MD5) Echevarria_Thesis_V2_de.docx: 3375419 bytes, checksum: 2167658967a4d40933a62cfe8f71eb17 (MD5) LICENSE.txt: 4215 bytes, checksum: 844144317173691d42abab0f94e41952 (MD5) Previous issue date: 2020-07-21 Embargo set by: Seth Robbins for item 116257 Lift date: 2022-10-07T22:44:53Z Reason: Author requested U of Illinois access only (OA after 2yrs) in Vireo ETD system Author requested U of Illinois access only (OA after 2yrs) in Vireo ETD system U of I Only application/pdf http://hdl.handle.net/2142/108630 en Copyright 2020 Desarae M. Echevarria Sanitation Agriculture Defining nutrient co-location typologies for human-derived supply and crop demands to advance resource recovery text Thesis Civil & Environmental Eng Environ Engr in Civil Engr University of Illinois at Urbana-Champaign Thesis M.S.