Livestock-biogas-fruit systems in South China

Rong-jun, Chen

doi:10.1016/s0925-8574(96)00250-9

Cited by 33 publications

(19 citation statements)

References 2 publications

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“…This has moved further forward with the purpose to develop sustainable and integrated material for energy-based agriculture and the rural economy. Hence, after a 40-year history of biogas for smallholders in rural China, the objective of developing biogas is not only to provide energy, but also to apply improved biogas technology to sustainable agricultural systems for recycling biomass [11] based on a large-scale application, such as the integrated pig-biogas-vegetable systems in northern China [29] and livestock-biogas-fruit systems in southern China [30]. For this reason, modern biogas utilization has been popularized in combination with ecological agriculture for a better performance of harmonizing economic profits, environmentally friendly development, and resource consumption optimization.…”

Section: Introductionmentioning

confidence: 99%

Sustainability-based economic and ecological evaluation of a rural biogas-linked agro-ecosystem

Dai

Chen

Hayat

et al. 2015

Renewable and Sustainable Energy Reviews

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Section: Introductionmentioning

confidence: 99%

Sustainability-based economic and ecological evaluation of a rural biogas-linked agro-ecosystem

Dai

Chen

Hayat

et al. 2015

Renewable and Sustainable Energy Reviews

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“…In the northwest region, biogas digesters with circumflex technology are applied to solve problems in resource updating and production efficiency (LSA 2010). Household biogas-based systems in different areas also vary from each other, such as newly developed biogaskitchen-farm-toilet model (MOA 2008), pig-biogas-fruit model in South China (Chen 1997;MOA 2001a, b), 4-in-1 biogas system in Northern China with a greenhouse (MOA 2001a, b), and 5-in-1 model in Northwest China with water and solar infrastructures (Yue 1997;MOA 2006MOA , 2013.…”

Section: Details Of Biogas Sectors In Chinamentioning

confidence: 99%

Where is the future of China’s biogas? Review, forecast, and policy implications

Zhang

Wang

et al. 2016

Pet. Sci.

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This paper discusses the history and present status of different categories of biogas production in China, most of which are classified into rural household production, agriculture-based engineering production, and industry-based engineering production. To evaluate the future biogas production of China, five models including the Hubbert model, the Weibull model, the generalized Weng model, the H-C-Z model, and the Grey model are applied to analyze and forecast the biogas production of each province and the entire country. It is proved that those models which originated from oil research can also be applied to other energy sources. The simulation results reveal that China's total biogas production is unlikely to keep on a fast-growing trend in the next few years, mainly due to a recent decrease in rural household production, and this greatly differs from the previous goal set by the official department. In addition, China's biogas production will present a more uneven pattern among regions in the future. This paper will give preliminary explanation for the regional difference of the three biogas sectors and propose some recommendations for instituting corresponding policies and strategies to promote the development of the biogas industry in China.

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“…In the United States, digesters are aimed at meeting energy production and waste treatment, especially with regard to animals in farms, allowing the manipulation of a material free of odors. Chen, 1997).…”

Section: Biodigestersmentioning

confidence: 99%

“…With the adoption of this policy, the Chinese government has substantially stimulated research toward the construction, operation and efficiency of digesters (Sinton et al, 1998;Chen, 1997;Sinton et al, 2000;Martinot, 2001).…”

Section: Introductionmentioning

confidence: 99%

Mathematical tool to size rural digesters

Florentino

2003

Sci. agric. (Piracicaba, Braz.)

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Anaerobic digesters have been highlighted due to the current energy crisis and its consequent search for alternative energy sources, allied to the intense process of livestock farming and agriculture modernization, which besides demanding a lot of energy, produces a great amount of crop and animal residues, most of the times generating sanitary problems. The aim of this work is to provide a mathematical tool to establish parameters for projects of construction of rural digesters, considering the response to energy demand, the suitability of the dimensions of the systems, yield factors and the guarantee of functionality. Non-linear optimization models, of easy resolution, for the three main types of rural digesters were formulated in this way. With the resolution of these models one can determine the height and the diameter that lead to a minimum volume for each type, so reducing the necessary amount of masonry and, consequently, diminishing the cost. Key words: mathematical model, optimization, parameters for designing FERRAMENTA MATEMÁTICA PARA AUXÍLIO NO DIMENSIONAMENTO DE BIODIGESTORES RURAISRESUMO: Os biodigestores têm sido objetos de grande destaque devido a atual crise de energia e conseqüente busca de fontes alternativas. Outro fator que coloca os biodigestores em evidência é o intenso processo de modernização da agropecuária, que além da grande demanda de energia, produz um volume de resíduos animais e de culturas, que ocasiona muitas vezes problemas de ordem sanitária. O objetivo deste trabalho é fornecer uma ferramenta matemática para determinação de parâmetros para projetos de construção de biodigestores rurais, levando-se em consideração o atendimento de necessidades energéticas, obedecendo os dimensionamentos dos sistemas, fatores de rendimento e garantindo a funcionalidade. Para isto, foram formulados modelos de otimização não lineares, de fácil resolução, para os três principais tipos de biodigestores rurais. Com a resolução destes modelos são determinados a altura e o diâmetro que levem a um volume mínimo para cada tipo, com isto reduz-se a quantidade necessária de materiais de alvenaria e consequentemente o custo do biodigestor é diminuído. Palavras-chave: modelo matemático, otimização, parâmetros de projeto

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Livestock-biogas-fruit systems in South China

Cited by 33 publications

References 2 publications

Sustainability-based economic and ecological evaluation of a rural biogas-linked agro-ecosystem

Sustainability-based economic and ecological evaluation of a rural biogas-linked agro-ecosystem

Where is the future of China’s biogas? Review, forecast, and policy implications

Mathematical tool to size rural digesters

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