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规模养殖粪污经厌氧发酵后产生的沼气和沼液没有充分利用存在严重二污染.针对这一问题,泰华养殖场和南昌大学紧密合作,运用系统工程理论和循环经济等多种理论集成,开发稳定供气工程技术,实现沼气充分利用:创建沼液分流、延迟过滤、自然流好氧、区域内三级储存工程技术,创建五项养种生物链工程技术,实现沼液系统内消化,实现了沼液达标排放.取得了非常好的效果.该开发处理模式结构简单,操作方便,特别适合规模养殖场推广利用,具有重要意义. 相似文献
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针对畜禽养殖场存在的水污染问题,研究了规模化畜禽养殖场污水"厌氧—人工湿地"无动力处理工艺模式。该模式将厌氧处理畜禽场废水技术和人工湿地处理有机废水技术有机组合,把人工湿地处理作为厌氧处理单元的后处理单元,达到了净化畜禽养殖场污水的目的,实现了畜牧污水处理工程占用土地少、工程投资省、无动力低成本运行和达标排放的目标。 相似文献
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以福建莆田鸿达牧业有限公司沼气发电循环经济项目为实例,分析规模化养殖小区沼气发电工程的效益。结果表明,该沼气工程日处理粪污约400t,年处理量达15万t,年产沼气约300万m3,用于发电,年可发电4600MWh,每年可创收320万元;而且沼气生产所产生的固态有机复合肥和沼液,可满足养殖小区及周边村镇的蔬菜基地以及周边农田和果树的土地生产用肥需要。该项目的经济效益、生态效益和社会效益良好,是实现畜禽粪便更高利用价值的最佳途径,不仅可解决养猪场的粪便、废水污染问题,还可促进当地环境保护和农业产业的升级换代。 相似文献
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畜禽养殖业废弃处理处置问题,是关系到养殖户可持续发展的关键问题。文章详实地介绍了安义县在综合利用畜禽养殖业废弃物的经验,经实践证明,在小规模畜禽养殖业中发展沼气生态农业,在集约化、规模化畜禽养殖业中发展有机肥产业是一条生态、绿色之路,并取得了良好的综合效益。 相似文献
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沼气发电不仅可以解决规模化养猪场畜禽污染,还可生产清洁能源,是发展可持续绿色循环农业的重要途径。以福建省福清市某规模化养猪场为例,介绍沼气产生工艺、沼气发电模式、注意问题及效益情况,为规模化养殖场沼气发电模式推广提供依据。 相似文献
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循环经济模式下餐厨垃圾资源化制沼效益评价 总被引:1,自引:0,他引:1
阐述了循环经济模式下餐厨垃圾资源化处理的理念,分析了餐厨垃圾资源化处理现状。在国内现有研究基础上确定了餐厨垃圾的近似分子式,计算了餐厨垃圾完全发酵后的理论产气量,对餐厨垃圾制沼资源化的经济效益、环境效益和社会效益进行了资源评价。研究结果表明,如将3 000 kg.d-1餐厨垃圾完全发酵,甲烷的理论产气量为1 230 m3?d-1,每年相当于节约标准煤782 t,实现CO2减排2 080 t、SO2减排为23 t,每年可产生50多万元的经济效益。 相似文献
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为实现矿区的循环经济发展,资源利用的最大化,通过小浮选试验,煤泥沉降试验,浮选系统生产效果试验等,成功将电厂的高盐废水应用于选煤补水系统中,不仅减少了电厂废水的排放,实现了废水的资源化利用,体现了社会效益、经济效益,环境效益的统一。 相似文献
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Energy from waste (EfW) has been identified as a source of ‘green electricity’ and has been used as a way of reducing greenhouse gas (GHG) emissions. Nevertheless, selecting an EfW strategy for municipal solid waste management is a challenging task not least because of the uncertainty involved in quantifying the potential economic and environmental impacts. This paper analyses five alternatives for managing the municipal solid waste of Sydney for their ‘green electricity’ and GHG savings potential under conditions of uncertainty. The impact of paper recycling on the ranking of alternatives was investigated, too. Our analysis shows that maximizing EfW generation potential does not result in greater GHG saving. A combination of food and green waste composting, recycling of metals, paper, glass and plastics while only landfilling waste fractions that are not recyclable may result in the best GHG savings. Furthermore, recycling of paper does not always achieve the best outcome; anaerobic digestion or composting may yield better results from an environmental and energy generation perspective. 相似文献
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The economic progress and sustainable developments are linked to the optimization and energy conservation. Conventional methods of production and energy utilization usually embed harmful environmental impacts, and hence the challenge to scientists to seek for mechanisms of energy production and use which are less harmful or better still free of unfavorable environmental impacts. Studies point out that municipal solid waste has great energy potential and its reuse, specifically the production of biogas from landfills and the recycling of solid waste presents a favorable mechanism to optimize energy use and preserve it. The present investigation includes the energy savings and the avoided emissions of CO2 to the atmosphere as a result of recycling and production of biogas from landfills in one metropolitan with more than one million inhabitants and in Brazil. The results show that the rate of CH4 production from the Brazilian waste landfills can avail for Brazil about 41.7 MW and the reuse of recyclables can avail to the energy system an additional quantity of 286 GJ/month enough for the consumption of 318,000 families. 相似文献
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《International Journal of Hydrogen Energy》2001,26(11):1209-1221
Innovative technologies are required to offset increasing consumption and declining stocks of non-renewable resources. This study examines a possible enhancement of waste management and transportation by integrating two emerging technologies: municipal solid waste (MSW) gasification and fuel cell vehicles (FCVs), by fueling FCVs with hydrogen produced from gasified MSW. Material and energy flows were modeled in four MSW management scenarios (incineration, landfill, gasification, gasification with recycling) and four transportation scenarios (hybrid gasoline-electric, methanol FCVs, hydrogen FCVs using hydrogen from natural gas or municipal solid waste). Technological performance deemed feasible within 2010–2020 was assumed. Greenhouse gas emissions and non-renewable energy use were used to assess overall system performance. Gasification with hydrogen production performs as efficiently as incineration, but is advantageous compared to landfilling. Taking into account additional environmental criteria, the model suggests that hydrogen from MSW gasification for FCVs may provide benefits over conventional MSW treatment and transportation systems. 相似文献
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一条生态平衡与保护的可持续发展之路--抚州市发展沼气能源及综合利用的调研思考 总被引:1,自引:0,他引:1
沼气是地里长出来的清洁可再生能源,能有效地解决农村的生活用能问题。沼气综合利用能有效地推动生态农业的发展,有效地防治农村面源污染,有效地解决城市生活污水达标排放问题,创造出巨大的经济效益,良好的社会效益和生态效益,成为发展绿色产业和循环经济的现实通道,推动农村全面协调可持续发展。 相似文献