Toward a Circular Economy Approach for Integrated Intensive Livestock and Cropping Systems

Taifouris, Manuel; Martín, Mariano

doi:10.1021/acssuschemeng.1c04014

Cited by 13 publications

(18 citation statements)

References 19 publications

(31 reference statements)

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“…A fraction of the digestate produced after anaerobic digestion is sent to the ponds as nutrients for algae growth, while the rest is processed to extract the nutrients for fertilizer production. 31 Biogas Reforming. The reforming of biogas is intended to produce syngas via dry or hybrid reforming with steam.…”

Section: ■ Process Descriptionmentioning

confidence: 99%

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Optimal Integrated Plant for Biodegradable Polymer Production

Antonio

Martín

2023

ACS Sustainable Chem. Eng.

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An integrated facility for the production of biodegradable polymers from biomass residues has been developed. Lignocellulosic residues (sawdust), CO2, and organic waste such as manure or sludge are the raw materials. Manure and sludge are digested to provide the nutrients needed to grow algae. Algae are used in full to oil and starch production. The oil is transesterified with methanol generated via biogas dry reforming to obtain biodiesel and glycerol. The starch is used together with glycerol and the pretreated sawdust for the production of the biodegradable polymer. A mathematical optimization approach is used to identify the best use of each resource and the optimal operation of the integrated facility for each case. 4732 kt/yr of manure or 4653 kt/yr of sludge was processed to produce 354 kt/yr of biopolymer and 84 Mgal/yr of fatty acid methyl ester, capturing 2.47 kg of CO2 per kg of biopolymer with production costs of 0.89 and 0.95 $/kg, respectively, and an investment capital of 717 and 712 M$, respectively.

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Section: ■ Process Descriptionmentioning

confidence: 99%

Section: Modeling Issuesmentioning

confidence: 99%

Optimal Integrated Plant for Biodegradable Polymer Production

Antonio

Martín

2023

ACS Sustainable Chem. Eng.

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“…These models can be used to formulate multi-objective optimization frameworks for the conceptual design of integrated agricultural systems for different objective scenarios such as the maximization of the economic profit of the system, the minimization of the environmental impacts of the system (including the global warming potential, eutrophication potential and the water footprint), or the search of the trade-off solutions between the profitability of the system and the reduction of its environmental impacts, reducing the external supply of phosphorus and the emissions of greenhouse gases (Taifouris and Martin, 2021).…”

Section: Integrated Crop-livestock Systemsmentioning

confidence: 99%

Addressing the contribution of agricultural systems to the phosphorus pollution challenge: a multi-dimensional perspective

2022

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The intensification of agricultural systems has increased the food production efficiency, increasing the productivity while the production costs are reduced. Although these factors are key to global food security in a context of continued human population growth, the use of intensive agricultural techniques results in different environmental issues. Mitigating these negative impacts is a requirement for adopting sustainable food production systems. Notably, nutrient pollution is one of the main environmental issues associated with both livestock and crop production. These activities result in different point and non-point source releases of phosphorus, which eventually reach surface and ground waterbodies. This might result in the accumulation of phosphorus over time, contributing to the eutrophication of water ecosystems, and the development of harmful algal bloom (HABs) episodes. The releases of nutrients from agricultural activities can be abated through different management strategies, including the implementation of nutrient recovery techniques at livestock facilities, embracing precision fertilization methods, and developing integrated crop-livestock systems for achieving circular food production systems. In this work, we describe opportunities for Process System Engineering (PSE) to address the development of phosphorus management techniques for mitigating phosphorus pollution from agricultural systems balancing trade-offs between recovery cost and environmental impact mitigation. These techniques integrate the spatial analysis of nutrient pollution from agriculture using geographical information systems (GIS) with the assessment and the selection of phosphorus management techniques combining techno-economic analysis (TEA) and environmental metrics through multi-criteria decision analysis (MCDA) frameworks, and use mathematical programming for the conceptual design of integrated crop-livestock systems.

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“…These correlations, yields, and mass balances have also been included in the supplementary material. The food that is not used as animal feed is sold as a by-product (only barley and wheat since the rest of the crops are either fully fed or have no market value (Taifouris and Martin, 2021)). In addition, the manure is treated to produce biogas and digestate through an anaerobic digestion system.…”

Section: Description Of the Problemmentioning

confidence: 99%

“…Therefore, intensive farming is necessary to supply food in an economically sustainable way to a growing population. Authors, such as Taifouris and Martin (2021) have addressed this type of integration for intensive livestock farming. Through models for estimating energy and nutritional requirements, waste treatment, nutrient recovery, and crop management, it is possible to determine the optimal feed formulation for the animals, the required crops, as well as the operating conditions of the waste treatment process, and the optimal formulation of fertilizers.…”

Section: Introductionmentioning

confidence: 99%