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Advancing Resource Recovery Following Anaerobic Secondary Treatment of Domestic Wastewater.

紀錄類型:	書目-電子資源 : Monograph/item
正題名/作者:	Advancing Resource Recovery Following Anaerobic Secondary Treatment of Domestic Wastewater./
作者:	Kim, Andrew Hyunwoo.
面頁冊數:	1 online resource (203 pages)
附註:	Source: Dissertations Abstracts International, Volume: 85-03, Section: B.
Contained By:	Dissertations Abstracts International85-03B.
標題:	Nitrates. -
電子資源:	http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=30561764click for full text (PQDT)
ISBN:	9798380265867

Advancing Resource Recovery Following Anaerobic Secondary Treatment of Domestic Wastewater.
Kim, Andrew Hyunwoo.

Advancing Resource Recovery Following Anaerobic Secondary Treatment of Domestic Wastewater. - 1 online resource (203 pages)

Source: Dissertations Abstracts International, Volume: 85-03, Section: B.

Thesis (Ph.D.)--Stanford University, 2023.

Includes bibliographical references

Proper treatment of domestic wastewater is crucial for the protection of human health and the environment. Conventional wastewater treatment processes have prioritized the removal of carbon, nitrogen, and phosphorus from wastewater streams prior to environmental discharge. These treatment processes are often high-cost, energy-intensive, and insufficient for recovering the various constituents found within wastewater for beneficial use. Furthermore, current wastewater treatment infrastructure in the United States is nearing the end of initial design lifespans and will require significant investments for upgrades. Next-generation water infrastructure therefore poses an opportunity to focus on recovery rather than removal of resources found in wastewater. Indeed, rethinking wastewater treatment plants as resource recovery facilities will be crucial to tackle emerging sustainability challenges such as water scarcity, nutrient depletion, and climate change.Anaerobic secondary treatment is a promising example of next-generation wastewater treatment infrastructure that prioritizes resource recovery. Particularly, anaerobic membrane bioreactors can produce high-quality effluents through membrane filtration and convert wastewater organics into methane, which can then be captured for energy. However, optimal unit processes that follow anaerobic secondary treatment have not yet been thoroughly established, and post-treatment of anaerobic secondary effluent requires further research. Anaerobic secondary effluents are unique in their composition compared to conventional secondary effluents due to the presence of dissolved methane, sulfide, ammonium, and phosphorus. Each of these constituents should be removed or recovered before discharge into the environment. Through a combination of experimental research, life cycle assessment, and technoeconomic analysis, this dissertation examines various post-treatment processes that can complement anaerobic secondary treatment to effectively manage dissolved methane, sulfide, nitrogen, and phosphorus in wastewater.Chapter 2is a life cycle assessment of wastewater treatment and potable reuse trains containing anaerobic secondary treatment. Nine hypothetical treatment scenarios were modelled to determine the tradeoffs between adopting physical/chemical processes versus biological processes for dissolved methane, sulfide, nitrogen, and phosphorus removal. Through a comprehensive life cycle assessment, the environmental impact of various emerging technologies within larger anaerobic treatment trains was evaluated. The results identify optimal post-treatment technologies following anaerobic secondary treatment and provide recommendations for technology investments in future research.Chapter 3investigates the potential for the membrane-aerated biofilm reactor to treat anaerobic secondary effluent that is rich in ammonium-nitrogen and sulfide. High levels of ammonium and sulfide oxidation were observed at loading rates relevant for mainstream anaerobic treatment. When N/S molar ratios were increased in the wastewater composition, complete nitrogen and sulfide removal was facilitated through sulfide-based denitrification processes. This work highlights the complex interactions between nitrogen and sulfur that must be considered for downstream resource recovery operations when aerating anaerobic secondary effluent.Chapter 4proposes a novel use for struvite, a form of phosphorus that can be recovered from wastewater through chemical precipitation. This work establishes for the first time that struvite can be used as a fire retardant for wildfire mitigation when carried by a viscoelastic, cellulosic hydrogel. A technoeconomic analysis was conducted that suggests wastewater treatment plants are profitable as fire retardant manufacturers through implementing struvite recovery operations.

Electronic reproduction.
Ann Arbor, Mich. :
ProQuest,
2023

Mode of access: World Wide Web

ISBN: 9798380265867Subjects--Topical Terms:

914879
Nitrates.
Index Terms--Genre/Form:

542853
Electronic books.

Advancing Resource Recovery Following Anaerobic Secondary Treatment of Domestic Wastewater.
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500 $a Source: Dissertations Abstracts International, Volume: 85-03, Section: B.
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502 $a Thesis (Ph.D.)--Stanford University, 2023.
504 $a Includes bibliographical references
520 $a Proper treatment of domestic wastewater is crucial for the protection of human health and the environment. Conventional wastewater treatment processes have prioritized the removal of carbon, nitrogen, and phosphorus from wastewater streams prior to environmental discharge. These treatment processes are often high-cost, energy-intensive, and insufficient for recovering the various constituents found within wastewater for beneficial use. Furthermore, current wastewater treatment infrastructure in the United States is nearing the end of initial design lifespans and will require significant investments for upgrades. Next-generation water infrastructure therefore poses an opportunity to focus on recovery rather than removal of resources found in wastewater. Indeed, rethinking wastewater treatment plants as resource recovery facilities will be crucial to tackle emerging sustainability challenges such as water scarcity, nutrient depletion, and climate change.Anaerobic secondary treatment is a promising example of next-generation wastewater treatment infrastructure that prioritizes resource recovery. Particularly, anaerobic membrane bioreactors can produce high-quality effluents through membrane filtration and convert wastewater organics into methane, which can then be captured for energy. However, optimal unit processes that follow anaerobic secondary treatment have not yet been thoroughly established, and post-treatment of anaerobic secondary effluent requires further research. Anaerobic secondary effluents are unique in their composition compared to conventional secondary effluents due to the presence of dissolved methane, sulfide, ammonium, and phosphorus. Each of these constituents should be removed or recovered before discharge into the environment. Through a combination of experimental research, life cycle assessment, and technoeconomic analysis, this dissertation examines various post-treatment processes that can complement anaerobic secondary treatment to effectively manage dissolved methane, sulfide, nitrogen, and phosphorus in wastewater.Chapter 2is a life cycle assessment of wastewater treatment and potable reuse trains containing anaerobic secondary treatment. Nine hypothetical treatment scenarios were modelled to determine the tradeoffs between adopting physical/chemical processes versus biological processes for dissolved methane, sulfide, nitrogen, and phosphorus removal. Through a comprehensive life cycle assessment, the environmental impact of various emerging technologies within larger anaerobic treatment trains was evaluated. The results identify optimal post-treatment technologies following anaerobic secondary treatment and provide recommendations for technology investments in future research.Chapter 3investigates the potential for the membrane-aerated biofilm reactor to treat anaerobic secondary effluent that is rich in ammonium-nitrogen and sulfide. High levels of ammonium and sulfide oxidation were observed at loading rates relevant for mainstream anaerobic treatment. When N/S molar ratios were increased in the wastewater composition, complete nitrogen and sulfide removal was facilitated through sulfide-based denitrification processes. This work highlights the complex interactions between nitrogen and sulfur that must be considered for downstream resource recovery operations when aerating anaerobic secondary effluent.Chapter 4proposes a novel use for struvite, a form of phosphorus that can be recovered from wastewater through chemical precipitation. This work establishes for the first time that struvite can be used as a fire retardant for wildfire mitigation when carried by a viscoelastic, cellulosic hydrogel. A technoeconomic analysis was conducted that suggests wastewater treatment plants are profitable as fire retardant manufacturers through implementing struvite recovery operations.
533 $a Electronic reproduction. $b Ann Arbor, Mich. : $c ProQuest, $d 2023
538 $a Mode of access: World Wide Web
650 4 $a Nitrates. $3 914879
650 4 $a Emissions. $3 3559499
650 4 $a Energy consumption. $3 631630
650 4 $a Climate change. $2 bicssc $3 2079509
650 4 $a Sustainability. $3 1029978
650 4 $a Energy. $3 876794
655 7 $a Electronic books. $2 lcsh $3 542853
690 $a 0640
690 $a 0404
690 $a 0791
710 2 $a ProQuest Information and Learning Co. $3 783688
710 2 $a Stanford University. $3 754827
773 0 $t Dissertations Abstracts International $g 85-03B.
856 4 0 $u http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=30561764 $z click for full text (PQDT)