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Bioreactor Alternative to Conventional Landfills

Description

Currently conventional Subtitle D landfills are the primary means of disposing of our waste in the United States. While this method of waste disposal aims at protecting the environment, it does so through the use of liners and caps that effectively freeze the breakdown of waste. Because this method can…

Currently conventional Subtitle D landfills are the primary means of disposing of our waste in the United States. While this method of waste disposal aims at protecting the environment, it does so through the use of liners and caps that effectively freeze the breakdown of waste. Because this method can keep landfills active, and thus a potential groundwater threat for over a hundred years, I take an in depth look at the ability of bioreactor landfills to quickly stabilize waste. In the thesis I detail the current state of bioreactor landfill technologies, assessing the pros and cons of anaerobic and aerobic bioreactor technologies. Finally, with an industrial perspective, I conclude that moving on to bioreactor landfills as an alternative isn't as simple as it may first appear, and that it is a contextually specific solution that must be further refined before replacing current landfills.

ContributorsWhitten, George Avery (Author) / Kavazanjian, Edward (Thesis director) / Allenby, Braden (Committee member) / Houston, Sandra (Committee member) / Civil, Environmental and Sustainable Engineering Programs (Contributor) / Barrett, The Honors College (Contributor)

Created2013-05

A Content Creator's Handbook to Fashion, Lifestyle, & Beauty

Description

This research covers the landscape of influencer marketing and combines it with the knowledge of 11 content creators and one social media specialist, ultimately producing an actionable handbook. Participants were asked questions that were intended to discover key strategies, level of difficulty, and overall insight into the content creator world.…

This research covers the landscape of influencer marketing and combines it with the knowledge of 11 content creators and one social media specialist, ultimately producing an actionable handbook. Participants were asked questions that were intended to discover key strategies, level of difficulty, and overall insight into the content creator world. Best practices and key findings are identified in the research paper, and outlined into four parts in the handbook. The handbook serves as a compilation framework derived from my primary and secondary sources designed to provide anyone interested in becoming a content creator or social media influencer on steps they may take given what their predecessors have done to successfully launch their careers in the space.

ContributorsEsparza, Alexa (Author) / Giles, Charles (Thesis director) / Schlacter, John (Committee member) / Department of Marketing (Contributor) / Barrett, The Honors College (Contributor)

Created2021-05

Characterization and Manipulation of Microbiomes From Arid Landfills for Improved Methane Production

Description

Environmentally harmful byproducts from solid waste’s decomposition, including methane (CH4) emissions, are managed through standardized landfill engineering and gas-capture mechanisms. Yet only a limited number of studies have analyzed the development and composition of Bacteria and Archaea involved in CH4 production from landfills. The objectives of this research were to…

Environmentally harmful byproducts from solid waste’s decomposition, including methane (CH4) emissions, are managed through standardized landfill engineering and gas-capture mechanisms. Yet only a limited number of studies have analyzed the development and composition of Bacteria and Archaea involved in CH4 production from landfills. The objectives of this research were to compare microbiomes and bioactivity from CH4-producing communities in contrasting spatial areas of arid landfills and to tests a new technology to biostimulate CH4 production (methanogenesis) from solid waste under dynamic environmental conditions controlled in the laboratory. My hypothesis was that the diversity and abundance of methanogenic Archaea in municipal solid waste (MSW), or its leachate, play an important role on CH4 production partially attributed to the group’s wide hydrogen (H2) consumption capabilities. I tested this hypothesis by conducting complementary field observations and laboratory experiments. I describe niches of methanogenic Archaea in MSW leachate across defined areas within a single landfill, while demonstrating functional H2-dependent activity. To alleviate limited H2 bioavailability encountered in-situ, I present biostimulant feasibility and proof-of-concepts studies through the amendment of zero valent metals (ZVMs). My results demonstrate that older-aged MSW was minimally biostimulated for greater CH4 production relative to a control when exposed to iron (Fe0) or manganese (Mn0), due to highly discernable traits of soluble carbon, nitrogen, and unidentified fluorophores found in water extracts between young and old aged, starting MSW. Acetate and inhibitory H2 partial pressures accumulated in microcosms containing old-aged MSW. In a final experiment, repeated amendments of ZVMs to MSW in a 600 day mesocosm experiment mediated significantly higher CH4 concentrations and yields during the first of three ZVM injections. Fe0 and Mn0 experimental treatments at mesocosm-scale also highlighted accelerated development of seemingly important, but elusive Archaea including Methanobacteriaceae, a methane-producing family that is found in diverse environments. Also, prokaryotic classes including Candidatus Bathyarchaeota, an uncultured group commonly found in carbon-rich ecosystems, and Clostridia; All three taxa I identified as highly predictive in the time-dependent progression of MSW decomposition. Altogether, my experiments demonstrate the importance of H2 bioavailability on CH4 production and the consistent development of Methanobacteriaceae in productive MSW microbiomes.

ContributorsReynolds, Mark Christian (Author) / Cadillo-Quiroz, Hinsby (Thesis advisor) / Krajmalnik-Brown, Rosa (Thesis advisor) / Wang, Xuan (Committee member) / Kavazanjian, Edward (Committee member) / Arizona State University (Publisher)

Created2022

Geochemical analysis of the leachate generated after zero valent metals addition to municipal solid waste

Description

Zero-Valent Metals (ZVM) are highly reactive materials and have been proved to be effective in contaminant reduction in soils and groundwater remediation. In fact, zero-Valent Iron (ZVI) has proven to be very effective in removing, particularly chlorinated organics, heavy metals, and odorous sulfides. Addition of ZVI has also been proved…

Zero-Valent Metals (ZVM) are highly reactive materials and have been proved to be effective in contaminant reduction in soils and groundwater remediation. In fact, zero-Valent Iron (ZVI) has proven to be very effective in removing, particularly chlorinated organics, heavy metals, and odorous sulfides. Addition of ZVI has also been proved in enhancing the methane gas generation in anaerobic digestion of activated sludge. However, no studies have been conducted regarding the effect of ZVM stimulation to Municipal Solid Waste (MSW) degradation. Therefore, a collaborative study was developed to manipulate microbial activity in the landfill bioreactors to favor methane production by adding ZVMs. This study focuses on evaluating the effects of added ZVM on the leachate generated from replicated lab scale landfill bioreactors. The specific objective was to investigate the effects of ZVMs addition on the organic and inorganic pollutants in leachate. The hypothesis here evaluated was that adding ZVM including ZVI and Zero Valent Manganese (ZVMn) will enhance the removal rates of the organic pollutants present in the leachate, likely by a putative higher rate of microbial metabolism. Test with six (4.23 gallons) bioreactors assembled with MSW collected from the Salt River Landfill and Southwest Regional Landfill showed that under 5 grams /liter of ZVI and 0.625 grams/liter of ZVMn additions, no significant difference was observed in the pH and temperature data of the leachate generated from these reactors. The conductivity data suggested the steady rise across all reactors over the period of time. The removal efficiency of sCOD was highest (27.112 mg/lit/day) for the reactors added with ZVMn at the end of 150 days for bottom layer, however the removal rate was highest (16.955 mg/lit/day) for ZVI after the end of 150 days of the middle layer. Similar trends in the results was observed in TC analysis. HPLC study indicated the dominance of the concentration of heptanoate and isovalerate were leachate generated from the bottom layer across all reactors. Heptanoate continued to dominate in the ZVMn added leachate even after middle layer injection. IC analysis concluded the chloride was dominant in the leachate generated from all the reactors and there was a steady increase in the chloride content over the period of time. Along with chloride, fluoride, bromide, nitrate, nitrite, phosphate and sulfate were also detected in considerable concentrations. In the summary, the addition of the zero valent metals has proved to be efficient in removal of the organics present in the leachate.

ContributorsPandit, Gandhar Abhay (Author) / Cadillo – Quiroz, Hinsby (Thesis advisor) / Olson, Larry (Thesis advisor) / Boyer, Treavor (Committee member) / Arizona State University (Publisher)

Created2019

Instagram Influencers: Building a Brand and Growing an Engaged Audience

Description

Influencer marketing is the latest phenomenon in the consumer marketing industry. Successful influencer sponsorships close the gap between companies and their customers by capitalizing on the connection influencers share with their audience. Producing advertisements more organically and directly, coming from a trustworthy and relatable source leads to greater returns. Therefore,…

Influencer marketing is the latest phenomenon in the consumer marketing industry. Successful influencer sponsorships close the gap between companies and their customers by capitalizing on the connection influencers share with their audience. Producing advertisements more organically and directly, coming from a trustworthy and relatable source leads to greater returns. Therefore, influencer accounts are becoming increasingly popular throughout social media, especially Instagram. For this reason, the main focal point of this paper is to describe how to effectively create an influencer brand by finding a niche and growing an engaged audience on Instagram. Our findings consist of three studies: personal interviews, creating an Instagram account, and analyzing twelve well-known influencers. We first analyzed the environmental trends impacting the social media industry and what this means for a growing influencer. Using our discoveries, we launched an Instagram account, featuring the Nordstrom Twins, learning from the first-hand experience of successful and unsuccessful content strategies. Then, through data collection and analysis of twelve unique twin influencer (twinfluencer) accounts, as well as personal interviews with industry professionals, we established an influencer business strategy. Our research conveys how to increase user interactions and grow an engagement rate on the constantly evolving Instagram platform.

ContributorsNordstrom, Hailey Rose (Co-author) / Nordstrom, Brooke (Co-author) / Smith, Anna (Co-author) / Dong, Xiaodan (Thesis director) / Eaton, Kathryn (Committee member) / Department of Marketing (Contributor) / Barrett, The Honors College (Contributor)

Created2019-12

How Influencer Marketing Affects Consumer Behavior

Description

Influencer marketing is a fairly new concept within the marketing industry. Even though this strategy of digital marketing has not been around too long, it has grown an immense amount over the last 5 years. This thesis analyzes how influencer marketing affects consumer behavior. This was done through a literature…

Influencer marketing is a fairly new concept within the marketing industry. Even though this strategy of digital marketing has not been around too long, it has grown an immense amount over the last 5 years. This thesis analyzes how influencer marketing affects consumer behavior. This was done through a literature review that highlights how consumers make decisions, the influencer marketing industry, and two case studies that evaluate influencer marketing campaigns along with their effects on consumer behavior. In addition, an online survey was distributed to consumers who actively follow influencers on social media to capture respondents’ attitudes of influencers and if they have been affected by them. The analysis of the responses showed that in this study, females are more affected by influencers than when compared to male responses. Other key insights were that the majority of respondents do not trust influencers; but yet, they still follow their content and take interest into influencers’ recommendations. The results indicate that there is a complex relationship between influencers and their followers that can be investigated upon further research. I recommend that influencers become more transparent with their followers to gain trust and authenticity so their followers view them as a credible and reliable source. Implementing the recommendations in this thesis can lead to more trust between influencers and their followers, as well as, more effective social media influencer campaigns for companies.

ContributorsHarris, Raquel Arleen (Author) / Giles, Charles Bret (Thesis director) / Schlater, John (Committee member) / Department of Marketing (Contributor) / Dean, W.P. Carey School of Business (Contributor) / Walter Cronkite School of Journalism & Mass Comm (Contributor) / Barrett, The Honors College (Contributor)

Created2020-12

Trust in Influencer Marketing on TikTok and Its Effects on Consumer Decisions

Description

Influencer marketing is when individuals with dedicated social media followings are sought out by brands to utilize their position on certain platforms to endorse a brand’s products and be compensated through payment or merchandise. I will be looking at the concept of trust when it comes to influencer marketing alongside…

Influencer marketing is when individuals with dedicated social media followings are sought out by brands to utilize their position on certain platforms to endorse a brand’s products and be compensated through payment or merchandise. I will be looking at the concept of trust when it comes to influencer marketing alongside the Fogg Behavior Model. Used to evaluate an individual’s behavior in the decisions making process, The Fogg Behavior Model bases itself in a persuasive environment by focusing on three key elements: motivation, ability, and trigger. When utilized in collaboration with influencer marketing, these elements together could have a strong effect on driving consumer behaviors. I utilized one of the most recent and popular social media platforms, TikTok, known for its short-form mobile videos, to explore these behavioral elements in action. Like any other media platform, TikTok influencer marketing requires a high amount of trust between the consumer and influencer to be successful and efficiently persuade the target market. I collected primary research by surveying opinions on trust and buying behaviors based on three different videos. One video had a hidden partnership disclosure in the caption, the second had a plainly visible partnership disclosure, and the third had a plainly visible partnership disclosure and verbally disclosed the relationship between the brand and the influencer. The analysis showed that participants felt a higher degree of trust towards the video which contained a verbal disclosure of the influencer’s partnership with the brand. The results lacked specificity on whether this perception of trust would successfully lead to a purchase, which could be adjusted for in future research; however, it did show there was motivation through the Fogg Model to look further into the product presented. I recommend influencers be as transparent and genuine as possible to earn the trust or their followers, as well as ensure all three factors of Fogg are present to increase their persuasive abilities over consumers completing a purchase.

ContributorsGraves, Darien (Author) / Giles, Charles (Thesis director) / Schlacter, John (Committee member) / Barrett, The Honors College (Contributor) / Department of Marketing (Contributor) / Department of Psychology (Contributor)

Created2022-05

Graves Final Project (Spring 2022)

Description

Influencer marketing is when individuals with dedicated social media followings are sought out by brands to utilize their position on certain platforms to endorse a brand’s products and be compensated through payment or merchandise. I will be looking at the concept of trust when it comes to influencer marketing alongside…

Influencer marketing is when individuals with dedicated social media followings are sought out by brands to utilize their position on certain platforms to endorse a brand’s products and be compensated through payment or merchandise. I will be looking at the concept of trust when it comes to influencer marketing alongside the Fogg Behavior Model. Used to evaluate an individual’s behavior in the decisions making process, The Fogg Behavior Model bases itself in a persuasive environment by focusing on three key elements: motivation, ability, and trigger. When utilized in collaboration with influencer marketing, these elements together could have a strong effect on driving consumer behaviors. I utilized one of the most recent and popular social media platforms, TikTok, known for its short-form mobile videos, to explore these behavioral elements in action. Like any other media platform, TikTok influencer marketing requires a high amount of trust between the consumer and influencer to be successful and efficiently persuade the target market. I collected primary research by surveying opinions on trust and buying behaviors based on three different videos. One video had a hidden partnership disclosure in the caption, the second had a plainly visible partnership disclosure, and the third had a plainly visible partnership disclosure and verbally disclosed the relationship between the brand and the influencer. The analysis showed that participants felt a higher degree of trust towards the video which contained a verbal disclosure of the influencer’s partnership with the brand. The results lacked specificity on whether this perception of trust would successfully lead to a purchase, which could be adjusted for in future research; however, it did show there was motivation through the Fogg Model to look further into the product presented. I recommend influencers be as transparent and genuine as possible to earn the trust or their followers, as well as ensure all three factors of Fogg are present to increase their persuasive abilities over consumers completing a purchase.

ContributorsGraves, Darien (Author) / Giles, Charles (Thesis director) / Schlacter, John (Committee member) / Barrett, The Honors College (Contributor) / Department of Marketing (Contributor)

Created2022-05

Graves Thesis Presentation (Spring 2022)

Description

Influencer marketing is when individuals with dedicated social media followings are sought out by brands to utilize their position on certain platforms to endorse a brand’s products and be compensated through payment or merchandise. I will be looking at the concept of trust when it comes to influencer marketing alongside…

Influencer marketing is when individuals with dedicated social media followings are sought out by brands to utilize their position on certain platforms to endorse a brand’s products and be compensated through payment or merchandise. I will be looking at the concept of trust when it comes to influencer marketing alongside the Fogg Behavior Model. Used to evaluate an individual’s behavior in the decisions making process, The Fogg Behavior Model bases itself in a persuasive environment by focusing on three key elements: motivation, ability, and trigger. When utilized in collaboration with influencer marketing, these elements together could have a strong effect on driving consumer behaviors. I utilized one of the most recent and popular social media platforms, TikTok, known for its short-form mobile videos, to explore these behavioral elements in action. Like any other media platform, TikTok influencer marketing requires a high amount of trust between the consumer and influencer to be successful and efficiently persuade the target market. I collected primary research by surveying opinions on trust and buying behaviors based on three different videos. One video had a hidden partnership disclosure in the caption, the second had a plainly visible partnership disclosure, and the third had a plainly visible partnership disclosure and verbally disclosed the relationship between the brand and the influencer. The analysis showed that participants felt a higher degree of trust towards the video which contained a verbal disclosure of the influencer’s partnership with the brand. The results lacked specificity on whether this perception of trust would successfully lead to a purchase, which could be adjusted for in future research; however, it did show there was motivation through the Fogg Model to look further into the product presented. I recommend influencers be as transparent and genuine as possible to earn the trust or their followers, as well as ensure all three factors of Fogg are present to increase their persuasive abilities over consumers completing a purchase.

ContributorsGraves, Darien (Author) / Giles, Charles (Thesis director) / Schlacter, John (Committee member) / Barrett, The Honors College (Contributor) / Department of Marketing (Contributor)

Created2022-05

In the Eyes of Content Creators: Influencer Marketing Model for Work Behind the Screens

Description

The purpose of this research is to create a model that will benefit this industry and the many changes to come. As of now, there are limited FTC guidelines which limit the protection of content creators, agencies, and brands. That is when I came up with the idea to develo…

The purpose of this research is to create a model that will benefit this industry and the many changes to come. As of now, there are limited FTC guidelines which limit the protection of content creators, agencies, and brands. That is when I came up with the idea to develop a model to further improve efficiency of the influencer marketing industry, and to help the entrepreneurs who are leading it. This model provides the framework for a strong start in the influencer marketing industry. Through informational interviews, literary research, field studies, and surveys, the model was developed through the data analysis of each of these tools, based on common themes found within each. This research was conducted from a variety of perspectives, including consumers, brands, agencies, and content creators.

ContributorsFurnas, Madison (Author) / Eaton, John (Thesis director) / Ingram-Waters, Mary (Committee member) / Svirskis, Anthony (Committee member) / Barrett, The Honors College (Contributor) / Department of Information Systems (Contributor) / Watts College of Public Service & Community Solut (Contributor) / Department of Marketing (Contributor) / Dean, W.P. Carey School of Business (Contributor)

Created2022-05

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