Life cycle assessment of large-scale and household biogas plants in northwest China

Wang, Yu; Wu, Xihui; Tong, Xiaogang; Li, Taotao; Wu, Faqi

doi:10.1016/j.jclepro.2018.04.264

Cited by 59 publications

(15 citation statements)

References 37 publications

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“…A few studies assessed the environmental benefits of low-cost digesters implemented in rural areas of low-income countries, such as Peru, China, India, Vietnam and Ethiopia. These studies proved that low-cost digesters led to environmental benefits by reducing GHG emissions, soil and water pollution (Garfí et al, 2012;Lansche and Müller, 2017;Sfez et al, 2017;Vu et al, 2015;Wang et al, 2018).…”

Section: Introductionmentioning

confidence: 92%

Evaluating environmental benefits of low-cost biogas digesters in small-scale farms in Colombia: A life cycle assessment

Garfí

Castro

Montero

et al. 2019

Bioresource Technology

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The aim of this study was to assess the environmental benefits of implementing low-cost digesters in small-scale farms in Colombia by using the LCA methodology. Four scenarios were taken into account considering two small-scale farms located in different areas: two (previous) scenarios where manure was stored in a manure pit and liquefied pretroleum gas (LPG) was used for cooking; and two (current) scenarios where manure is treated in low-cost digesters, the digestate replaces the synthetic fertiliser and the biogas is used for cooking replacing the LPG. Results showed that digesters implementation considerably reduced (by up to 80%) potential environmental impacts associated with manure handling, fuel and fertiliser use in the small-scale Colombian farms. This was mainly due to the reduction of LPG and synthetic fertiliser use which were replaced by biogas and digestate. An economic assessment showed that low-cost digesters reduced expenses associated with cooking fuel and fertiliser purchase by 80%.

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Section: Introductionmentioning

confidence: 92%

Evaluating environmental benefits of low-cost biogas digesters in small-scale farms in Colombia: A life cycle assessment

Garfí

Castro

Montero

et al. 2019

Bioresource Technology

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“…Anaerobic digestion (AD) is a sequence of biological processes for the digestate, where one of its end products is biogas [42]. The benefits from AD processes can be categorized into energy production, livestock manure recycling, and the production of biofertilizers [43,44]. Although anaerobic digestion achieves satisfactory rates in the production of biogas and methane, there are numerous problems that mono-anaerobic digestion cannot solve, such as carbon to nitrogen (C/N) ratio limitation, process inhibition, low buffering capacity, drop in pH, and slow fermentation process [45,46].…”

Section: The Cr Biogas Projectmentioning

confidence: 99%

“…Different assessments can be considered to emphasize the feasibility of CR biogas projects, such as choosing the proper biogas system [50], the substances used for biogas production [51,52], the size of the biogas plant [43], and the obtained digestate [53]. A large-scale biogas plant operates on the feedstock of crop waste [54].…”

Section: The Cr Biogas Projectmentioning

confidence: 99%

Techno-Economic Assessment of Three Modes of Large-Scale Crop Residue Utilization Projects in China

Meng

Alengebawy

et al. 2020

Energies

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In China, the non-exploitation of bioenergy poses major problems and challenges. To solve bioenergy problems, considerable efforts have been made to expedite the construction of large-scale crop residue utilization projects. In this study, three principal supported modes of large-scale crop residue utilization projects were taken as empirical cases in Hubei province bioenergy planning. In terms of the overall benefit and sustainable development, a third-grade evaluation index system was established. The analysis was carried out using the analytical hierarchy process, principal component projection, and grey relational analysis. The conclusion indicates that according to the evaluation values, the sequence from best to worst was crop residue biogas project, crop residue briquette fuel project, and crop residue gasification project. Nevertheless, there was no remarkable difference in the overall evaluation values. The biogas project had certain advantages in terms of the production cost, soil improvement, and expenditure saving, whereas the gasification project was comparatively insufficient in environmental efficiency, product benefit, by-product disposal, and technical rationality. According to actual evaluation results, the unilateral determination approach of the single weight index can be seen as being overcome through the unified adaptation of the evaluation methods. The research results can serve as a reference for making investment decisions to build large-scale crop residue utilization projects.

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“…At present, however, little attention has been paid to the development and utilization of biomass energy in this region. Some scholars have explored the extension and environmental impact of biomass energy development projects in this region [20]. However, there is almost no research on the assessment of biomass energy resource reserves and exploitation potential in this region, which is an obvious research gap that needs to be filled.…”

Section: Introductionmentioning

confidence: 99%

Research on Potential Evaluation and Sustainable Development of Rural Biomass Energy in Gansu Province of China

2018

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The development and utilization of renewable energy is an important way to solve the environmental dilemma. Biomass energy is a kind of renewable energy and one of the most widely distributed and easily accessible energy forms. It has currently become a main direction of renewable energy development. This paper took Gansu Province of China as the research object to calculate its theoretical reserves of biomass energy resources and then evaluate its potential of biomass energy development by using TOPSIS method under different agricultural development and geographical environmental conditions. Spatial autocorrelation analysis was also performed to reveal the spatial distribution and temporal evolution of the potential of biomass energy development in Gansu Province. The results show that: (1) The total reserves of biomass energy resources from agricultural wastes in Gansu Province reach 7.28 × 107 t/year, with equivalent biogas production of about 1.95 × 1010 m3/year. (2) In most counties of Gansu Province, the Ci value is smaller than 0.5000, indicating that the potential of biomass energy development is relatively low in Gansu Province. (3) The spatial agglomeration of biomass energy development potential occurs mainly in the Hexi area, the Gannan area and the Loess Plateau area of East Gansu Province. (4) There is an area with obvious high-low (H-L) agglomeration of biomass energy development potential to the north-west side of the Gannan area with low-low (L-L) agglomeration of biomass energy development potential. It is a key zone to help drive biomass energy development in the Gannan area. (5) The spatial range of positive correlation (high-high and low-low agglomeration) areas shrunk during the evaluation period.

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Life cycle assessment of large-scale and household biogas plants in northwest China

Cited by 59 publications

References 37 publications

Evaluating environmental benefits of low-cost biogas digesters in small-scale farms in Colombia: A life cycle assessment

Evaluating environmental benefits of low-cost biogas digesters in small-scale farms in Colombia: A life cycle assessment

Techno-Economic Assessment of Three Modes of Large-Scale Crop Residue Utilization Projects in China

Research on Potential Evaluation and Sustainable Development of Rural Biomass Energy in Gansu Province of China

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