자료유형  

 학위논문

Control Number  

0017164283

International Standard Book Number  

9798342125598

Dewey Decimal Classification Number  

621.48

Main Entry-Personal Name  

Kogler, Anna.

Publication, Distribution, etc. (Imprint  

[S.l.] : Stanford University., 2024

Publication, Distribution, etc. (Imprint  

Ann Arbor : ProQuest Dissertations & Theses, 2024

Physical Description  

393 p.

General Note  

Source: Dissertations Abstracts International, Volume: 86-04, Section: B.

General Note  

Includes supplementary digital materials.

General Note  

Advisor: Tarpeh, William.

Dissertation Note  

Thesis (Ph.D.)--Stanford University, 2024.

Summary, Etc.  

요약Nutrients (nitrogen and phosphorus) in wastewater have negative environmental, human health, and economic impacts, but are valuable components of fertilizers and other industrial chemicals. Nutrient management currently relies on energy- and chemical-intensive processes that remove nutrients from wastewater to prevent negative environmental impacts. Shifting from this removal approach to nutrient recovery from wastewater can create resource-efficient, circular systems that support increased sanitation access and greater equity in resource access. Electrochemical nitrogen recovery technologies, which are modular, easily automated, and multi-functional, can enable such circular systems but require further investigation guided by both existing research and practitioner needs for scale-up and implementation.Chapter 2 of this dissertation presents a systematic literature review on nutrient removal and recovery technologies combined with engagement of wastewater practitioners. A framework for reporting and comparing diverse nutrient technologies was proposed. Synthesizing peer-reviewed literature and practitioner input allowed prioritizing knowledge gaps and barriers to implementation into a research agenda that addresses the most reported gaps, presents performance metrics relevant to practice, and centers systemslevel evaluations. Guided by the findings in Chapter 2, Chapters 3 through 5 present experimental evaluations of multiple electrochemical nitrogen recovery processes. In Chapter 3, electrochemical stripping was demonstrated to perform consistently for over a month during continuous urine treatment, recovering multiple batches of ammonium sulfate fertilizer. The study also generated insights on process monitoring and reactor component failure during long-term operation. In Chapter 4, the fate of disinfection byproducts was characterized in electrochemical stripping, electrodialysis, and bipolar electrodialysis treating urine. The study indicated that recovered nitrogenous products were largely free of contamination with disinfection byproducts, but mitigation of these contaminants in treated urine and other reactor compartments is crucial for safe implementation of these technologies. In Chapter 5, a novel process, flexible electrochemical stripping, was evaluated during urine treatment. The process facilitated tailored recovery of ammonium sulfate and ammonia using electrochemical operating parameters to control product speciation and to achieve multiple commercially relevant product concentrations.These efforts advance a circular nitrogen economy by demonstrating feasibility of longterm operation, identifying needs and strategies for mitigating harmful byproducts, and enabling tunable recovery of multiple products that can be used as fertilizers, disinfectants, fuels, and feedstocks for chemical synthesis. The findings of this dissertation inform the design of resource-efficient wastewater treatment trains harnessing electrochemical nitrogen recovery to expand access to sanitation, valuable chemicals, and food.

Subject Added Entry-Topical Term  

Reactors.

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Environmental engineering.

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Urine.

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Resource recovery.

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Effluents.

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Energy consumption.

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Technology.

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Nitrogen.

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By products.

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Greenhouse gases.

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Carbon.

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Pandemics.

Subject Added Entry-Topical Term  

Fertilizers.

Subject Added Entry-Topical Term  

Ammonia.

Subject Added Entry-Topical Term  

Chemical engineering.

Subject Added Entry-Topical Term  

Nutrient removal.

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Agronomy.

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Climate change.

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Energy.

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Epidemiology.

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Statistics.

Added Entry-Corporate Name  

Stanford University.

Host Item Entry  

Dissertations Abstracts International. 86-04B.

Electronic Location and Access  

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Control Number  

joongbu:657959