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description Publicationkeyboard_double_arrow_right Article , Journal 2019 AustraliaPublisher:MDPI AG Funded by:ARC | Linkage Projects - Grant ..., ARC | Maximisation of value in ...ARC| Linkage Projects - Grant ID: LP150100402 ,ARC| Maximisation of value in underground mine access designAuthors:Stefano Freguia;
Maddalena Logrieco;Stefano Freguia
Stefano Freguia in OpenAIREJuliette Monetti;
Pablo Ledezma; +2 AuthorsJuliette Monetti
Juliette Monetti in OpenAIREStefano Freguia;
Maddalena Logrieco;Stefano Freguia
Stefano Freguia in OpenAIREJuliette Monetti;
Pablo Ledezma;Juliette Monetti
Juliette Monetti in OpenAIREBernardino Virdis;
Bernardino Virdis
Bernardino Virdis in OpenAIRESeiya Tsujimura;
Seiya Tsujimura
Seiya Tsujimura in OpenAIREdoi: 10.3390/su11195490
Nutrient recovery from source-separated human urine has been identified by many as a viable avenue towards the circular economy of nutrients. Moreover, untreated (and partially treated) urine is the main anthropogenic route of environmental discharge of nutrients, most concerning for nitrogen, whose release has exceeded the planet’s own self-healing capacity. Urine contains all key macronutrients (N, P, and K) and micronutrients (S, Ca, Mg, and trace metals) needed for plant growth and is, therefore, an excellent fertilizer. However, direct reuse is not recommended in modern society due to the presence of active organic molecules and heavy metals in urine. Many systems have been proposed and tested for nutrient recovery from urine, but none so far has reached technological maturity due to usually high power or chemical requirements or the need for advanced process controls. This work is the proof of concept for the world’s first nutrient recovery system that powers itself and does not require any chemicals or process controls. This is a variation of the previously proposed microbial electrochemical Ugold process, where a novel air cathode catalyst active in urine conditions (pH 9, high ammonia) enables in situ generation of electricity in a microbial fuel cell setup, and the simultaneous harvesting of such electricity for the electrodialytic concentration of ionic nutrients into a product stream, which is free of heavy metals. The system was able to sustain electrical current densities around 3 A m–2 for over two months while simultaneously upconcentrating N and K by a factor of 1.5–1.7.
Sustainability arrow_drop_down The University of Queensland: UQ eSpaceArticle . 2019Data sources: Bielefeld Academic Search Engine (BASE)add ClaimPlease grant OpenAIRE to access and update your ORCID works.This Research product is the result of merged Research products in OpenAIRE.
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more_vert Sustainability arrow_drop_down The University of Queensland: UQ eSpaceArticle . 2019Data sources: Bielefeld Academic Search Engine (BASE)add ClaimPlease grant OpenAIRE to access and update your ORCID works.This Research product is the result of merged Research products in OpenAIRE.
You have already added works in your ORCID record related to the merged Research product.This Research product is the result of merged Research products in OpenAIRE.
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