Technologies to mitigate enviromental impact of swine production

Williams, C.M.

doi:10.1590/s1516-35982008001300029

Cited by 7 publications

(5 citation statements)

References 4 publications

(4 reference statements)

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“…Thus, large amounts of manure are applied to the soil without undergoing any kind of treatment or stabilization, and without considering agronomic and legal criteria (Kunz et al, 2005). According to Williams (2008), much of the environmental impact generated by swine farming is a result of the lack of adequate management of solid and liquid waste. The waste produced in CAFOs often exceeds the amount that can be used as biofertilizer due to land requirement limitations (Kinyua et al, 2014).…”

Section: Introductionmentioning

confidence: 99%

Swine Wastewater Nitrogen Removal at Different C/N Ratios Using the Modified Ludzack-Ettinger Process

et al. 2018

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The swine industry has been presented strong growth and thus is producing large volumes of effluents that must be correctly management. Nitritation/denitritation process can be used to improve system performance, saving the energy cost with aeration and with the external source of carbon due to the lower C/N requirement. The aim of this study was to evaluate swine wastewater Nitrification/Denitrification (NDF) and Nitritation/denitritation (NDT) processes at different C/N ratios, using the Modified Ludzack-Ettinger (MLE) process, in order to obtain a system with efficient nitrogen removal and low oxygen and carbon consumption. Four phases were conducted during the experiment: Phase I) DO between 2.0-3.0 mg L -1 of O2 and C/N 1.5 (NDF); Phase II) DO between 0.6-0.7 mg L -1 of O2 and C/N 1.5 (NDT); Phase III) DO between 0.6-0.7 mg L -1 of O2, C / N ratios of1.5, 0.9, 0.75 and 0.6 (NDT); Phase IV) DO between 2.0-3.0 mg L -1 of O2, C/N ratios of 1.5, 0.9, 0.75, and 0.6 (NDF). The best operational condition was found in the C / N ratio of 0.9 (Phase III) obtaining an optimum N removal of 86.3%. In this condition, the system saved around 26.8% in total organic carbon consumption and operated at conditions of 74% lower dissolved oxygen when compared to conventional process for N-removal. This strategy can be very useful for nitrogen removal for low carbon swine wastewater as digestate from anaerobic processes.

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Section: Introductionmentioning

confidence: 99%

Swine Wastewater Nitrogen Removal at Different C/N Ratios Using the Modified Ludzack-Ettinger Process

et al. 2018

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“…O Brasil encontra-se entre os dez maiores produtores mundiais da carne, estando na quarta posição no ranking de produtores e também nesta colocação no quesito exportação (4). A busca pela maior produção e a criação intensiva contribuem para o aumento da produção de efluentes e de resíduos, que se manejados de forma errônea podem causar diversos desequilíbrios ambientais, sanitários, econômicos e sociais (1,5,6,7).…”

Section: Introductionunclassified

Análise ambiental, sanitária e econômica de um sistema de tratamento de resíduos sólidos e efluentes em uma granja de suínos

Farezin¹,

Sarubbi²,

Morais³

et al. 2018

RVZ

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FRM. Análise ambiental, sanitária e econômica de um sistema de tratamento de resíduos sólidos e efluentes em uma granja de suínos. Vet. e Zootec. 2018 mar.; 25(1): 164-172. RESUMOOs dejetos suínos apresentam potencial poluidor do ponto de vista ambiental e sanitário devido à alta carga de matéria orgânica. Entretanto, quando devidamente tratados, podem apresentar potencial para a geração de produtos de valor agregado. Objetivou-se realizar uma análise ambiental, sanitária e econômica de um sistema de tratamento de resíduos sólidos e efluentes (STRSE) em uma granja tecnificada de suínos de ciclo completo. O STRSE foi constituído basicamente por compostagem, biodigestão anaeróbica e retenção e desidratação do lodo. Foram realizados testes laboratoriais, onde foram avaliados parâmetros físicoquímicos e microbiológicos. A análise de viabilidade econômica do STRSE foi amparada na técnica de orçamento de capital. O STRSE foi capaz de tratar os resíduos orgânicos e os efluentes tornando-os incapazes de causarem danos ambientais e sanitários. Houve também ganho social e redução de passivos ambientais. Na análise econômica, o STRSE levará cerca de nove anos para amortizar o capital investido.Palavras-chave: compostagem, biodigestão anaeróbica, biogas, biofertilizante, coliformes. ABSTRACTThe swine manure have pollution potential of environmental and sanitary point of view due to the high organic matter content. However, when properly treated, may present potential for generating value-added products. This study aimed to carry out an environmental analysis, health and economic of a solid waste treatment system and wastewater (WTSW) in a technified swine farm full cycle. The WTSW was formed basically by composting, anaerobic digestion and retention and sludge dehydration. Laboratory tests were evaluated in chemical and microbiological physical parameters were performed. The economic viability of WTSW analysis was supported in capital budgeting technique. The WTSW was able to treat organic waste effluents and rendering them unable to cause environmental and health damage. There was also gain social and reduction of environmental liabilities. In the economic analysis, WTSW will take about nine years to amortize the capital invested.

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“…The increase in density and pig population has caused serious environmental problems since, according Vanotti et al [4] and Williams [5], the application of manure as a source of nutrient aggravates the emissions of volatile organic compounds, particulate matter, pathogens and odor. Furthermore, one of the issues is the evident contamination of surface and ground water and soil when waste is discarded without treatment (Peng [6] Riaño and García-González [7]).…”

Section: Introductionmentioning

confidence: 99%

Cluster formation of potential assessment for swine manure treatment and biogas generation in an experimental watershed in Rio Grande do Sul, Brazil

Schneider¹,

Zanoni²,

Carra³

2016

WIT Transactions on Ecology and the Environment

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This paper presents a proposal for collective systems for handling manure, also called clusters, and consequent generation of electricity from biogas, for a swine herd installed in 2012 in the municipalities of Serafina Corrêa and União da Serra, in the State of Rio Grande do Sul, Brazil. From the preparation of sand, hypsometry and slope maps for both municipalities associated with plotting the location of the swine herds, this work proposed five clusters where the waste of 8,660 animals are conducted entirely by gravity. The biogas generated in the anaerobic treatment is transformed into electrical energy could supply 285 homes whose average monthly consumption is 200 kWh or can be inserted into the internal or external network of property, corroborating in extra income to swine farmers and the sustainability of the activity. From this objective, the job initiates a technical assessment in order to enable these collective treatment systems and reduce the environmental impacts generated by swine activity.

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Technologies to mitigate enviromental impact of swine production

Cited by 7 publications

References 4 publications

Swine Wastewater Nitrogen Removal at Different C/N Ratios Using the Modified Ludzack-Ettinger Process

Swine Wastewater Nitrogen Removal at Different C/N Ratios Using the Modified Ludzack-Ettinger Process

Análise ambiental, sanitária e econômica de um sistema de tratamento de resíduos sólidos e efluentes em uma granja de suínos

Cluster formation of potential assessment for swine manure treatment and biogas generation in an experimental watershed in Rio Grande do Sul, Brazil

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