基于成本——效益分析的安徽农村生物沼气发展研究

生物沼气为生物质能源中最为普及的一种,由于其分散性、小型化和就地取材适合农村发展。文章运用成本——效益函数,通过将农村沼气发展具有代表性地区的实地调研情况与函数的理论前提进行对比分析后发现,发展大中型沼气项目更适合农村实际,从而提出下一阶段农村沼气的发展模式。     

生物气固体氧化物燃料电池研究进展

对近年来国内外生物气固体氧化物燃料电池发电领域的研究进行了归纳分析。在介绍生物气产生和氧离子型固体氧化物燃料电池产电原理的基础上，总结了固体氧化物燃料电池以生物质产出的生物气为燃料发电所涉及的电化学反应；介绍了国外研究者对该类发电过程进行的试验和模拟研究；同时，对生物气结合固体氧化物燃料电池的研究进展进行了分析。得出的结论为，生物气结合固体氧化物燃料电池进行产电具有重大的实际和环保意义。     

陕西省南郑县户用沼气池经济效益分析

本文通过对陕西省南郑县产用沼气泡成本、收益和经济效益的分析评价，希冀以效益促进户用沼气池的推广。通过投入要土的企敏度分析，指出户用沼气池推广的关键因土，并提出对策性建议。     

沼渣花卉栽培营养基质应用研究

以猪粪和牛粪为主的沼渣作为原料,复配木屑、草炭和蛭石,形成5种适合喜酸性花卉的栽培基质,并在比利时杜鹃上进行栽培试验。在对不同基质组分理化性状分析的基础上,研究5种栽培基质对杜鹃植株营养生长,生殖生长的影响;及基质pH值的变化特点,为沼渣类基质的应用奠定基础。     

Exploitation of Renewable Energy in the Hospitality Sector: Case Studies of Gaborone Sun and the Cumberland Hotel in Botswana

This study examines the factors influencing the adoption of renewable energy technologies at two hotels in Botswana. Interviews with key informants from Gaborone Sun and the Cumberland Hotel were used to collect the data for this study. The study was designed along the general conceptual model of the drivers and barriers of corporate “greening.” Narrative analysis was used to present the findings. Results point to the fact that the availability of the biogas and solar technology in Botswana, political leadership, financial benefits, the availability of a comprehensive environmental sustainability program, and strong environmental management values were the driving forces behind renewable energy adoption by the two hotels. The major barriers against biogas adoption by the Cumberland Hotel included lack of financial resources and limited waste. For solar energy adoption at Gaborone Sun, the main problem was lack of space for further expansion, which has also constrained the hotel’s efforts for wastewater recycling. These results have implications at both local and national levels. Environmental management strategies and values should drive the exploitation of renewable energy by local hotels. At the national level, results imply that the government should take a more responsive approach in facilitating the adoption of renewable energy plans by the corporate world.     

南方农村沼气发展新模式的环境经济分析

随着农村市场化的推进和沼气池建造技术的提高,广东梅州农村自发出现了"一户建池,多户使用,统一收费,统一管理"的沼气商品化发展新模式.对典型案例的财务分析表明,建池户2至3年即可收回成本,收益期至少为17年,通过类比得出的生态环境效益为每年885.2元.与典型"猪-沼-果"模式相比,最主要的差别在于两点:一是规模远远大于后者,二是实现了沼气商品化.沼气商品化发展新模式降低了市场风险,提高了沼气池的使用效能,增加了经济,环境及社会效益,把建池户从繁重的工作中解放出来,提高了他们的生活质量.随着我国市场经济体系的进一步完善,农村沼气必然要向市场化、集约化方向发展.发展的途径主要有两条:一是扩大规模,二是改进技术.大型猪场施行沼气并网发电是未来的发展方向.     

西部地区农户收入水平对农村能源消费的影响分析

西部地区农村人口众多,农村能源建设是西部地区可持续发展的一个重要条件,而沼气建设是西部农村能源建设的重点。文章在介绍西部地区农村能源概况的基础上,对农户收入水平对沼气消费的影响进行理论、实证分析,得出农户人均纯收入水平对农村人均沼气消费量的影响是非线性关系的结论,提出针对不同收入水平的农户采取相应的措施来解决农村能源短缺,促进生态农业良性发展。     

我国农业大中型沼气工程发展现状、 存在问题与对策措施

该文分析了我国处理农业废弃物大中型沼气工程建设数量、产气量、区域分布及沼气工艺类型等方面的发展现状,总结了我国沼气工程发展中存在的主要问题,提出了加快我国大中型沼气工程发展的对策措施。     

江苏农村沼气建设的思考

随着现代农业和新农村建设的进一步推进,农村新能源建设取得了显著成效,沼气作为一项重要基础建设起到了推动作用。但在沼气推广和建设的过程中,发现江苏省农户建沼气的数量在不断增加,但使用率却很低,"建而不用"的现象值得反思。通过实地调查,该文分析了江苏省新能源建设的状况和沼气推广情况,分析沼气建设中存在的问题和推广欠佳的原因,最后提出了相关的政策建议。     

From circular business models to circular business ecosystems

The circular economy aims to minimize resource inputs and waste and emission outputs of the economy and its organizational subsystems. This can benefit both financial and sustainability performance of companies. To analyze industrial implementation of the concept, the prevalent unit of analysis on the firm level is currently the circular business model. Our investigation of nine Swedish biogas companies and one branch organization indicates a range of conceptual shortcomings that challenges this approach. Our comparative case analysis points towards circular ecosystems being a more appropriate concept to describe the high level of coordination between different stakeholders necessary to implement circular systems. This increases the suitability to analyze, plan, and communicate circular economy systems on an organizational level, especially if value chain integration is low. An ecosystem perspective can thus support innovation and entrepreneurship in the context of the circular economy.