用循环经济理念构建沈阳西部生态工业走廊

从沈阳市建设西部工业走廊的实际出发,提出运用循环经济理念,切实实现沈阳市西部工业走廊中化工、冶金、建材三个园区内各个企业内部、各园区内部企业之间、三个园区之间的物质集成、水和能量的梯级使用与信息集成,以及资源减量化、废物资源化的目标,为沈阳市西部工业走廊建设提供了有益的建议。     

基于循环经济理念构建我国未来的造纸业

造纸工业是我国制造业中为数不多的朝阳产业,也是污染较为严重的行业。在结合目前国内外造纸业发展现状的基础上,基于循环经济理念,从三个层面上探讨了如何构建我国未来的造纸业,提出了我国未来造纸业可持续发展模式:先组织企业内部的物质循环和能量梯级利用,其次结合自身和周边环境的特点构建有效产业链,同时积极开展废纸资源的回收利用以形成社会层面上的大循环,最终实现造纸业的可持续发展。     

基于生态效率建立我国循环经济评价指标体系的思考

如何科学地定量评价循环经济的发展水平是循环经济的一个基础理论问题。本文探讨了生态效率与循环经济之间的关系,以生态效率指标为基础,建立了我国循环经济评价指标体系。该指标体系突出强调了循环经济的生态效率目标,基本涵盖了循环经济的主要内容,体现了循环经济的核心内涵、“3R”原则和本质要求,能够全面、客观反映循环经济发展的状况和程度,为政府决策提供科学的依据。     

Optimization of animal manure vermicomposting based on biomass production of earthworms and higher plants

The goal of this study was to optimize the mixture of swine manure (SM) and cattle manure (CM) used in the vermicomposting process, seeking to increase the manure biodegradation rate and enhance the biomass production of both earthworms and higher plants. To achieve this goal, physico-chemical parameters were determined to assess the final compost quality after 50 days of vermicomposting. The different manure ratios used to produce the composts (C) were as follows (SM:CM, % m/m basis): C1 100:0, C2 (75:25), C3 (50:50), C4 (25:75), and C5 (0:100). In addition, the earthworm biomass and the phytoproductivity of lettuce (Lactuca sativa L.) plants grown in mixtures (1:1) of natural soil and the most viable vermicomposts were investigated. The C1 and C2 compost compositions were associated with high earthworm mortality rates. The C3 compost provided the highest mineral concentrations and C5 showed the highest lettuce yield (wet biomass). The results verify that stabilized cattle manure is an excellent substrate for the vermicomposting process and that fresh swine manure must be mixed with pre-stabilized cattle manure to ensure an optimized vermicomposting process, which must be controlled in terms of temperature and ammonia levels. It is concluded that small livestock farmers could add value to swine manure by applying the vermicomposting process, without the need for high investments and with a minimal requirement for management of the biodegradation process. These are important technical aspects to be considered when circular economy principles are applied to small farms.     

川化股份有限公司循环经济竞争力评估研究

循环经济建设是从根本上缓解资源环境短缺与经济快速发展之间的尖锐矛盾的有效模式。本文对四川省发展循环经济建设成效较显著的试点企业——川化股份有限公司进行基于循环经济的企业竞争力评估。通过建立企业循环经济竞争力评估指标体系,采用数学模糊评估模型,系统分析了企业的基于循环经济的竞争力水平。报告的评估成果显示,经5年的企业循环经济建设,截止2009年,川化股份有限公司基于循环经济的企业竞争力总体处于“强”的水平。     

煤炭产业物质流核算的指标体系构建研究

循环经济落实到实处,不仅需要从技术端不断推进新技术在生产活动各领域的应用,更需要一个整体的资源和能源管理体系.物质流核算即是通过对国家、地区或产业的实物流的核算,理清资源和能源使用过程.通过针对循环经济发展较为成熟的煤炭产业进行物质流核算的指标体系构建,找到一些建立物质流核算体系的思路,并提出具体政策建议.     

企业实施循环经济的战略探讨

本文从循环经济的原则出发,根据国际实践以及中国实行循环经济的实际情况,提出了企业实现循环经济发展的四种战略：清洁生产和全过程污染控制战略、企业生产者责任延伸战略、产业链拓展战略和废弃物综合利用战略,为企业进行循环经济建设提供一定的指导和参考作用。     

基于三层结构的绿色招商选择体系研究

阐述了中国招商引资的基本情况及存在的问题,提出了进行绿色招商的必要性.在绿色招商选择系统结构分析的基础上,提出了基于三层结构的绿色招商选择体系,并根据该体系构建了s工业园的绿色招商选择体系.     

论旅游景区循环经济的策略

本文尝试将循环经济的理论与方法导入旅游业,提出了旅游业循环经济的内涵,以及旅游景区循环经济的概念与发展模式,井着重就旅游景区循环经济的实施策略进行了研究。     

Potential dissemination mechanism of the tetC gene in Aeromonas media from the aerobic biofilm reactor under oxytetracycline stresses

The tetC gene has been found to be one of the most widely distributed tetracycline resistance (tet) genes in various environmental niches, but the detailed dissemination mechanisms are still largely unknown. In the present study, 11 tetC-containing Aeromonas media strains were isolated from an aerobic biofilm reactor under oxytetracycline stresses, and the genome of one strain was sequenced using the PacBio RSII sequencing approach to reveal the genetic environment of tetC. The tetC gene was carried by an IS26 composite transposon, named Tn6434. The tetC-carrying Tn6434 structure was detected in all of the A. media strains either in a novel plasmid pAeme2 (n=9) or other DNA molecules (n=2) by PCR screening. The NCBI database searching result shows that this structure was also present in the plasmids or chromosomes of other 13 genera, indicating the transferability of Tn6434. Inverse PCR and sequencing confirmed that Tn6434 can form a circular intermediate and is able to incorporate into a preexisting IS26 element, suggesting that Tn6434 might be responsible for the dissemination of tetC between different DNA molecules. This study will be helpful in uncovering the spread mechanism of tet genes in water environments.