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211.
Dezhen Chen Zhenzhen Guan Guangyu Liu Gongming Zhou Tong Zhu 《Frontiers of Environmental Science & Engineering》2010,4(2):235-243
Aged municipal solid wastes (MSW) excavated from landfills and dumpsites were characterized to analyze their fraction composition, moisture content, and lower heat value (LHV). The necessity and feasibility of recycling combustibles from aged MSW to improve the incineration of fresh MSW were investigated. The results showed that combustibles in aged MSW were easily separated from other components and than LHV of the separated combustibles are higher than 11000 kJ/kg. The fresh MSW are of high moisture contents with average LHV below 6500 kJ/kg, making their stable combustion difficult to maintain in MSW incinerators. For both fresh MSW and aged MSW, plastics are the main contributor to their LHV. To improve incineration of fresh MSW that are characterized with low LHV, combustibles separated from aged MSW were made into refuse derived fuel (RDF) pellets and were then added to fresh MSW by 2% wt.–5% wt. LHV variation and air supply resistance change of the MSW layer on the incinerator grate caused by the addition of RDF was checked, and no significant changes were found. No obvious difference was observed for the ‘burn-out time’ between RDF pellets and fresh MSW either. RDF made from aged MSW combustibles is found to be a promising auxiliary fuel to improve the incineration of fresh MSW, and aged MSW from old landfill cells and dumpsites can be finally disposed of jointly with fresh MSW by recycling combustible from the former to be coincinerated with the latter in the incineration plants. 相似文献
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213.
菲高效降解菌的降解特性及其受蒙脱石的影响研究 总被引:1,自引:0,他引:1
通过选择性富集培养与纯化,从广州油制气厂附近的污染土壤中分离获得一株能以菲为唯一碳源和能源,快速生长的优势菌株(编号为YZ-1)。16S rDNA序列分析结果表明,YZ-1菌株为琼氏不动杆菌(Acinetobacter junii)。当无机盐培养液中菲初始质量浓度为100mg·L-1时,45h内该菌株对菲的降解率可达到99.5%。YZ-1菌株的最佳生长条件为pH7.4,温度30℃,摇床转速160r·min-1。加入蒙脱石矿物之后,在降解的初期(前16h)表现为促进菲的生物降解作用,但随着时间的延长,菲的降解速率逐渐低于不加蒙脱石体系,并随蒙脱石含量或菲质量浓度的增加,此抑制延缓现象愈加明显。矿物对高浓度的菲具有吸附分散作用,而对低浓度的菲具有吸附保护作用。 相似文献
214.
复极性固定床电解反应器对活性染料的降解 总被引:11,自引:0,他引:11
本文用复极性固定床电解反应器对16种活性染料的脱色降解进行了试验研究。结果表明:染料脱色率在99.6%以上,出水上清液COD去除率绝大部分在90%以上,对活性翠蓝KN-G和活性深蓝KM-GR的铜去除率分别为97.0%和99.7%。 相似文献
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216.
Junjie Guan Kent M. Eskridge Milford A. Hanna 《Journal of Polymers and the Environment》2004,12(3):113-121
Acetylated starches, with degrees of substitution (DS) of 2, 2.5 and 3, were blended with 3%, 7.5% and 12% -cellulose and 14%, 17% or 20% (d.b.) ethanol and twin-screw extruded at 165°C barrel temperature and 225 rpm screw speed. A response surface methodology experimental design was applied to the sub-plot and a completely randomized design to the whole plot design to test the differences among the acetylated starches and the effects of cellulose and ethanol. DS, cellulose and ethanol contents significantly affected the functional properties and specific mechanical energy requirement. DS had positive effects on radial expansion ratio (RER), compressibility and specific mechanical energy requirement and a negative effect on bulk density. Highest (RER) was obtained from 20% ethanol content. Extrudates containing 12% cellulose had the highest bulk density and the highest compressibility. Higher cellulose contents required more specific mechanical energy. 相似文献
217.
企业层面开展循环经济试点 2002年,泰兴市率先在企业层面开展循环经济试点工作.经过几年的努力,泰兴的企业在大幅度提升经济和社会效益的同时,环境效益也显著提高. 相似文献
218.
Gao Shuai Li Changsuo Jia Chao Zhang Hailin Guan Qin Wu Xiancang Wang Jinxiao Lv Minghui 《Environmental science and pollution research international》2020,27(9):9274-9287
Environmental Science and Pollution Research - Nitrate pollution in rivers, lakes, shallow groundwater, and even deep groundwater occurs in many parts of the world. And, it’s essential to... 相似文献
219.
220.
城市环境承载力分析与评估——以湛江市为例 总被引:1,自引:0,他引:1
介绍了环境承载力的涵义以及城市环境承载力的评估方法,以PSR模型研究环境压力所对应的环境状态,以此评估城市环境承载状态,并以湛江市为对象,展开城市环境承载力的现状分析,在此基础上对未来不同发展阶段的环境承载力做情景分析,从减压—改善—优化层次上提出湛江市环境承载力提升的对策建议。 相似文献