Coordinated management of organic waste and derived products

Sampat, Apoorva M.; Yi-cheng, HU; Sharara, Mahmoud; Aguirre-Villegas, Horacio A.; Ruiz-Mercado, Gerardo J.; Larson, R. H.; Zavala, Ví­ctor M.

doi:10.1016/j.compchemeng.2019.06.008

Cited by 35 publications

(33 citation statements)

References 20 publications

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“…The Upper Yahara Watershed (Lake Mendota basin) has been used as a case study to evaluate the impact of manure storage, 55 manure pelletization, 56 and nutrient recovery technologies. 57,58 The study region is affected by nutrient pollution due to intensified agricultural activities; the Dane County has made continuous efforts to reduce nutrient pollution (especially P loading) to improve water quality in the lakes (e.g., nutrient pollution leads to HABs). To highlight the degree of nutrient pollution in the region, we define the nutrient balance index (NBI) as the ratio of nutrient applied to land to the amount of nutrient that is removed by crops.…”

Section: Case Studymentioning

confidence: 99%

Managing Conflicting Economic and Environmental Metrics in Livestock Manure Management

Yi-cheng

Aguirre-Villegas

Larson

et al. 2022

Preprint

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airy farming is a multi-billion {USD} industry that provides essential food products. At the same time, the millions of animals that this industry oversees generate a massive environmental footprint (affecting air, land, and water quality). Specifically, livestock manure is a carbon- and nutrient-rich waste stream that is routinely used as fertilizer. This practice enables nutrient recycling but also leads to emissions of greenhouse gases and to nutrient pollution of soils and waterbodies. Mitigating these environmental impacts requires investment in manure processing technologies; identifying and prioritizing investment strategies requires understanding inherent conflicts (trade-offs) and synergies that exist between economic and environmental impacts. In this work, we present a conflict analysis and resolution framework that integrates techno-economic analysis (TEA), life cycle assessment (LCA), and supply chain (SC) optimization. We use this framework to investigate deployment scenarios of manure processing pathways in the Upper Yahara watershed region of Wisconsin; here, we evaluate LCA metrics (GHG emissions, ammonia emissions, fossil energy use, and nutrient pollution) and TEA metrics (cost and revenue) for different pathways that include manure collection, storage, application, and processing steps. The LCA and TEA metrics are embedded within a SC optimization model that makes decisions on technology selection and geographical placement and on product transport in the study area. A conflict resolution procedure is used to explore trade-offs associated with these decisions and to identify optimal compromise solutions that best balance trade-offs. Our results reveal that there exist non-obvious conflicts and synergies between the explored metrics that can be exploited to mitigate multiple impacts simultaneously. We also find that the deployment of a diverse set of technologies is needed to fully resolve conflicts. The impact of emerging technologies (ultrafiltration and reverse osmosis) and government incentives is also discussed.

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Section: Case Studymentioning

confidence: 99%

Managing Conflicting Economic and Environmental Metrics in Livestock Manure Management

Yi-cheng

Aguirre-Villegas

Larson

et al. 2022

Preprint

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“…We provide a brief overview of this coordination markets model in the next section. More details about this framework and the economic properties satisfied by the cleared prices can be found in Sampat et al 27 .…”

Section: Waste Processingmentioning

confidence: 99%

“…Moreover, the prices are also known as coordination prices as they can be used as incentives to promote coordination between stakeholders. The allocations and prices generated from the clearing formulation also represent a competitive economic equilibrium that maximizes the collective profit of the market players 27 .…”

Section: Suppliersmentioning

confidence: 99%

“…The croplands in our study area have a total P uptake capacity of 629.74 tons/yr. 27 There is thus a surplus of 288.09 tons/yr of P. We consider that 10% of this excess P runs off to Lake Mendota. To keep the calculations on a conservative side, we have assumed that 10% of excess P runs off to the lake instead of the 10% of applied P (which is the number used in state-of-the-art LCA methods like ReCiPe 29 for mid-point and end-point environmental impact categories).…”

Section: Case Studymentioning

confidence: 99%

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Valuing economic impact reductions of nutrient pollution from livestock waste

Sampat

Hicks

Ruiz-Mercado

et al. 2021

Resources, Conservation and Recycling

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Nutrient pollution from livestock waste impacts both fresh and marine coastal waters. Harmful algae blooms (HABs) are a common ecosystem-level response to such pollution that is detrimental to both aquatic life and human health and that generates economic losses (e.g., property values and lost tourism). Waste treatment and management technologies are not well established practices due, in part, to the difficulty to attribute economic value to associated social and environmental impacts of nutrient pollution. In this work, we propose a computational framework to quantify the economic impacts of HABs. We demonstrate the advantage of quantifying these impacts through a case study on livestock waste management in the Upper Yahara watershed region (in the state of Wisconsin, USA). Our analysis reveals that every excess kilogram of phosphorus runoff from livestock waste results in total economic losses of 74.5 USD. Furthermore, we use a coordinated market analysis to demonstrate that this economic impact provides a strong enough incentive to activate a nutrient management and valorization market that can help balance phosphorus within the study area. The proposed framework can help state, tribes, and federal regulatory agencies develop regulatory and non-regulatory policies to mitigate the impacts of nutrient pollution.

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“…Unprofitable transactions do not receive allocations and are called dry. Competitive transactions receive a positive allocation and are said to clear Sampat et. al.…”

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confidence: 99%

Evaluating Landfill Diversion Strategies for Municipal Organic Waste Management Using Environmental and Economic Factors

Tominac

Aguirre-Villegas

Sanford

et al. 2020

ACS Sustainable Chem. Eng.

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Municipal organic waste (MOW) contributes to greenhouse gas (GHG) emissions which lead to global climate change. Creating incentives that encourage consumers to adopt MOW disposal strategies that minimize environmental impacts. Policymakers must ensure that incentive programs align with environmental objectives and are economically competitive, else such policy will create inefficiencies. The MOW disposal infrastructure in the city of Milwaukee, WI was evaluated using a coordinated market model that captures the inherent value of using environmental indicators estimated with partial life cycle assessment methods in the context of the city's waste management supply chain. Using this approach, tax programs are identified that incentivize consumers to reduce emissions through their MOW disposal choices. Results indicate that the current MOW collection and disposal infrastructure in Milwaukee is such that consumers are already incentivized to minimize MOW GHG emissions by collecting MOW and sending this to composting and digestion sites that have lower tipping fees and are located closer to the city. disposal options. When minimizing GHG emissions, anaerobic digestion systems are prioritized for allocation of MOW, but the situation can be altered depending upon tipping fees and transport distances. Composting and digestion hold few opportunities for reducing ammonia emissions from landfills, but there is a need to expand ammonia emissions measurements from landfill systems to improve model predictions.

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Coordinated management of organic waste and derived products

Cited by 35 publications

References 20 publications

Managing Conflicting Economic and Environmental Metrics in Livestock Manure Management

Managing Conflicting Economic and Environmental Metrics in Livestock Manure Management

Valuing economic impact reductions of nutrient pollution from livestock waste

Evaluating Landfill Diversion Strategies for Municipal Organic Waste Management Using Environmental and Economic Factors

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