生物能源:产自加纳淡水绿色微藻和蓝藻的生物柴油

Q4 Environmental Science West African Journal of Applied Ecology Pub Date : 2019-01-01 DOI:10.4314/wajae.v27i2
L. K. Doamekpor, R. Onwona-Agyeman, G. Ameka
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引用次数: 8

摘要

从淡水绿色微藻和蓝藻中提取的生物柴油有望取代石油柴油,以满足交通、工业和家庭使用的能源需求。在这项研究中,研究人员评估了在加纳出现的三种绿色淡水微藻(Closterium acerosum Ehrenberg ex Ralfs, Oedogonium ciliatum Pringsheim ex Hirn和Spirogyra africana (F.E.Fritsch) Czurda)和一种淡水蓝藻(choococcus turgidus (Kutzing) Nageli),以验证它们对生物柴油生产的适用性。标本采自渭亚湖;绿色淡水微藻在Bold’s basic Medium培养基中培养,蓝藻在BG-11 (Blue-Green Medium)培养基中培养,在光生物反应器中培养14 d。用己烷和乙醚从该物种的干生物质中提取藻类脂质,并通过碱催化酯交换法制备生物柴油。从该物种中提取的脂质含量从Spirogyra的20.3%到odogonium的38.2%不等。生物柴油的产量也从Spirogyra的6.7到Closterium的22.3%不等,这些数值在世界范围内报道的这类生物的范围内。我们建议,在加纳未来的生物柴油生产和开发工作中,应该对更多的微藻进行脂质含量取样。
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Bioenergy: Biodiesel from Freshwater Green Microalgae and a Cyanobacterium Occurring in Ghana
This study on the Songor Ramsar and UNESCO Man and Biosphere Reserve in Ghana seeks to investigate the factors that contribute to degradation of Songor Ramsar and UNESCO Man and Biosphere Reserve in Ghana through the administration of structured questionnaires using the drop-and–collect approach, face-to-face interviews and focus group discussions. The study revealed that the ranking of natural resources and occupation of the area are based on the demarcated zones within which the community is situated. Salt, fisheries and arable lands were identified as the most important natural resource in the wetland. The results on environmental degradation of the wetlands in the Songor Ramsar site in Ghana made it clear that the underlying causes of environmental degradation in the Songor Ramsar site are mainly a combination of Institutional and policy failures. It was revealed that the problem of environmental degradation is a consequence of ineffective enforcement of bye-laws. A combination of several factors such as improper waste disposal, poor attitude of residents toward environmental conservation, wildfires and shoreline recession, inadequate public education on the impact of environmental degradation, fishing and farming activities were identified during the administration of structured questionnaire, face-to-face interviews and focus group discussions. The other factors include overgrazing, over exploitation of mangroves, Predation, poaching and over fishing, uncontrolled sand and salt winning. Constraints and weaknesses to the implementation of regulations and laws with respect to conservation and protection of the wetlands identified during the study are lack of public education on the economic importance and the need to conserve the wetland, encroachment by developers, lack of enforcement of bye-laws, over-exploitation of mangroves and waste management.
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来源期刊
West African Journal of Applied Ecology
West African Journal of Applied Ecology Environmental Science-Ecology
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期刊介绍: This research journal has been established by the Ecological Laboratory Unit of the University of Ghana, Accra to publish original papers, invited articles and book reviews in English on general ecology. Papers are peer reviewed by consulting editors. The journal is targeted at scientists, policy makers and the general public. The subject areas to be covered include the following: -Theoretical and Applied Ecology- Environmental Studies- Environmental Management- Population Studies- Sustainable use of Natural Resources- Atmospheric Science- Aquatic Sciences and Oceanography- Terrestrial Ecology- Soil Sciences- Human Settlements- Disaster Preparedness and Disaster Reduction- Sustainable Development- Traditional Knowledge on Biodiversity and its sustainable use- Application in Agriculture and Land Use- Health and Environmental Protection
期刊最新文献
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