共查询到19条相似文献,搜索用时 140 毫秒
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介绍了厌氧发酵制沼气的技术、沼气的应用,及我国农村沼气发展模式,分析了养殖场沼气工程的应用模式以及沼气利用的市场前景。 相似文献
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我国畜禽粪便沼气发电模式刚刚起步。从近年的发展情况来看,已有大型企业投资建立畜禽粪便沼气发电厂,与畜禽粪便肥料化、饲料化相比,这种方式有其独特的发展特点。以德青源公司蛋鸡粪沼气发电模式为例,对其经济效益和发展特点进行分析和总结。在此基础上,利用SWOT分析方法对该种畜禽粪便处理模式所具有的优势、劣势、机会和威胁进行总结和归纳,为发展该种模式提供战略与对策上的支持。 相似文献
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采用血清瓶静态试验法研究了垃圾渗出污水的厌氧处理的可行性。试验表明:垃圾渗出污水对厌氧发酵微生物无抑制作用,有良好的厌氧降解性,产气率为0.321/g·COD,污水中的大部份有机物都能被厌氧消化,COD_cr去除率为78.2%,发酵过程中还能获得能源——沼气。具有良好的应用前景。 相似文献
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农村畜禽养殖污染的综合防治 总被引:1,自引:0,他引:1
畜禽养殖污染已成为农村环境污染的突出问题。本文通过调查分析广安市辖区内畜禽养殖业的发展和污染现状,在实地研究广安市两个畜禽养殖示范工程的基础上,借鉴现有的畜禽养殖污染防治技术成果,提出了一套以"养殖—沼气—农灌"和"养殖—堆肥—沼气—农灌"两种模式为技术基础,结合政策和法律措施,系统防治畜禽养殖污染的方案,有助于指导农村畜禽养殖的科学、绿色发展。 相似文献
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采用水解酸化+厌氧发酵生物气化技术处理农作物废弃物秸秆,在建德市航头镇航川村建设了工程示范点,处理废弃物的同时实现了为15户农户集中供气。通过运行表明,该工艺可年处理秸秆1 260 m3,年产沼气7 300 m3,所产三沼均得到有效利用,实现了零污染、零排放。通过工程实例证明该工艺能有效处理秸秆废弃物,且易于操作和管理,并具有一定的经济效益。 相似文献
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Restoration of a Canadian Prairie Wetland with Agricultural and Municipal Wastewater 总被引:1,自引:0,他引:1
3 /day (800,000 US gallons) of municipal wastewater and beef processing wastewater. A large nongovernmental organization hastened
restoration with a development process that outlined restoration goals and management objectives to satisfy a dual mandate
of wastewater treatment and wildlife habitat creation. In 1995, after five years of wastewater additions, the basins had been
refilled and the surrounding uplands had been acquired and restored. The Frank Lake Conservation Area currently provides high-quality
habitat for a variety of wildlife in a region where many of the native plants and animals species have been lost due to habitat
loss and fragmentation. The success of upland and water management strategies is reflected in the increase of target species'
abundance and richness: 50 shorebird species, 44 waterfowl species, 15 raptor species, and 28 other new bird species have
returned to the marsh since restoration. As well, significant N and P reduction occurs as waters flow through the first basin
of the marsh. The management strategies of this project that satisfied a dual mandate serve as a model to guide managers of
other large-scale wetland restoration projects. 相似文献
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Estimates of enteric methane (CH4) emissions from ruminants are typically measured by confining animals in large chambers, using head hoods or masks, or by a ratiometric technique involving sampling respired air of the animal. These techniques are not appropriate to evaluate large-scale farm emissions and the variability between farms that may be partly attributed to different farm management. This study describes the application of an inverse-dispersion technique to calculate farm emissions in a controlled tracer-release experiment. Our study was conducted at a commercial dairy farm in southern Alberta, Canada (total of 321 cattle, including 152 lactating dairy cows). Sulfur hexafluoride (SF6) and CH4 were released from 10 outlet locations (barn and open pens) using mass-flow controllers. A Lagrangian stochastic (LS) dispersion model was then used to infer farm emissions from downwind gas concentrations. Concentrations of SF6 and CH4 were measured by gas chromatography analysis and open path lasers, respectively. Wind statistics were measured with a three-dimensional sonic anemometer. Comparing the inferred emissions with the known release rate showed we recovered 86% of the released CH4 and 100% of the released SF6. The location of the concentration observations downwind of the farm was critically important to the success of this technique. 相似文献
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Kennett SA 《Environmental management》2002,30(5):0595-0608
Biosphere greenhouse gas (GHG) management consists of preserving and enhancing terrestrial carbon pools and producing biomass
as a fossil fuel substitute. The discussion of this topic has focused primarily on carbon-accounting and project-level issues,
particularly relating to carbon sequestration as a source of emissions credits under the Kyoto Protocol. While international
consensus on these matters is needed, this paper argues that an important domestic policy agenda also deserves attention.
National policies for biosphere GHG management are necessary to bring about large-scale changes in land-use, forestry, and
agricultural practices and can address some of the technical and policy issues that have proven to be particularly problematic
from carbon-accounting and project-level perspectives. These policies should minimize land-use and resource-management conflicts,
account for collateral benefits, and ensure institutional compatibility with existing resource-management regimes. Issues
relating to project permanence, leakage, and transaction costs should also be addressed. A range of policy instruments should
be used and biosphere GHG management should be one component of an integrated approach to environmental and resource management.
Countries promoting biosphere GHG management as an important element of their climate change strategies should be developing
these domestic policies to complement international negotiations and to demonstrate that carbon sequestration and biomass
production can make an effective contribution to the stabilization of atmospheric GHG concentrations. 相似文献
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Roots of salt marsh plant speciesSpartina alterniflora, S. patens, Distichlis spicata, and others were examined for the presence of vesicular-arbuscular mycorrhizal (VAM) fungi. Samples were taken from introduced
planted material in a salt marsh restoration project and from native material in adjacent marsh areas along the Indian River,
Clinton, Connecticut, USA. After ten years the replanted area still has sites devoid of vegetation. The salt marsh plants
introduced there were devoid of VAM fungi, while high marsh species from the adjacent undisturbed region showed consistent
infection, leading the authors to suggest that VAM fungal infection of planting stocks may be a factor in the success of marsh
restoration. 相似文献
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Sari Janhunen Maija Hujala Satu Pätäri 《Journal of Environmental Policy & Planning》2018,20(2):214-235
The planning process for wind farm projects appears to be a complicated matter in many cases. Despite the positive attitude towards wind power in general, local wind farm projects often face strong opposition. The aim of this study is to shed more light on residents’ perceptions of participation in the planning process of wind farms. This study is based on interview data (N?=?22) and survey data (N?=?291) collected from residents living near two Finnish large-scale onshore wind farms built about 1.5 years before the data were collected. The results indicate that residents’ participation in the planning process was rather passive and the vast majority of the respondents perceived that they did not have an opportunity to participate. Quite interestingly, perceived participation in the planning process resulted in a decrease in acceptability in terms of perceived well-being. Furthermore, the results indicate that the need for participation does not expire after the planning process for a wind farm has concluded. Thus, project developers should be prepared to continue communication with residents after the planning phase. 相似文献
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Noreen Brennan Thomas M Van Rensburg Cyril Morris 《Journal of Environmental Planning and Management》2017,60(11):1967-1992
Although international trade in energy may offer a flexible and cost effective means by which European countries could meet their renewable energy targets, developers in the exporting nation can face local opposition for reasons which are not always clear. Using focus groups and a public survey, we contrast perspectives between local stakeholders and wind farm operators and investigate the community impacts associated with large-scale wind energy for domestic use and export from Ireland to the UK. Although the export of renewable energy from Ireland to the UK is currently on hold, our findings suggest that significant investment is required by the state and wind farm operators in better information provision, trust building, effective instruments to internalise wind farm externalities and co-management arrangements before Ireland can fully capture the benefits of wind exports to the UK. 相似文献