Rapid Culture and Characteristics Analysis of Anaerobic Granular Sludge     

Shi Yunfen  Sun Meng  Zhang Gengyu  Guan Hongcheng 《保鲜与加工》2013,(5):7-12

The aim of this study is to investigate the effect of different inert carrier on the formation of anaerobic granular sludge, which used swine wastewater as a cultivation of anaerobic granular sludge self-made reactor flooding water. The results show that anaerobic reactor which was dosing macroporous type ion exchange resin cultivated granular sludge using 39 d and particle size was 2.50 to 3.00 mm, effluent water COD removal efficiency achieving 80%, methane-producing capacity achieving 9.75 mL CH4·（g VSS·d） -1, comparing with the anaerobic reactor which was dosing polymerization aluminum and fly ash had higher methanogenic activity, comparing with the anaerobic reactor which was not dosing any carrier shorten cultivation time about 20%~45% and granular sludge activity improved 14.00%±0.10%. Referred to Richards model found relationship of methane production and effluent water COD and established mathematical model. Analysis of experimental data and model data deviation was within 0.50%±0.01%.  相似文献   

Mechanism of crack-oriented of hydraulic fracture and its technique in mine   总被引：1，自引：0，他引：1       下载免费PDF全文

XIA Binwei  HU Ke  LU Yiyu  LIU Yong  SONG Chenpeng 《保鲜与加工》2013,(9):8-13

Drainage is inefficient of coal seam treated by hydraulic fracture due to disordered propagation of fracture. Therefore, we propose a novel approach of fracture-oriented via slotting a slitting in coal seam by high pressure water jet. Firstly,boreholes-oriented are drilled around the borehole of hydraulic fracture. Then we slot the coal seam via high pressure water jet. Finally,we carry out hydraulic fracture in the borehole. Shear destruction area which is formed under geostress is located on crack tip. And crack propagates along horizontal direction because the major principal stress direction is horizontal. Besides,we develop the technique of crack-oriented and apply it in typical low permeability coal seam. The results show that the technique is efficient. The diameter of hydraulic fracture is larger than 25 m,the concentration of gas drainage is 68% on average,and the gas flow is 0.037 m 3/min. The concentration and flow of gas increase 2.12 times and 11.26 times respectively comparing to those of traditional technique.  相似文献   

A mathematical model on the pulverized coal blending optimization for blast furnace injection based on principal component analysis          下载免费PDF全文

SU Buxin  ZHANG Jianliang  GUO Hongwei  CAO Weichao  FU Yuandi  BAI Yanan 《保鲜与加工》2013,(11):51-57

A mathematical model of coal blending optimization for blast furnace injection is proposed. Because Chinese current blast furnaces blend pulverized coal by simple mix and traditional lab blending optimization needs plenty of work for the larger number of characteristics of pulverized coal. The new model is based on the principal component analysis indexes P1, P2 and P3 combined with the proximate analysis and elementary analysis of pulverized coal. P1, P2 and P3 are obtained from principal component analysis of the injection characteristic of pulverized coal determined by lab experiment. This model is proved to be effective on both lab experiment coal blending and actual production of BF.  相似文献   

水曲柳落叶松带状混交林结构调整对水曲柳林带土壤理化性质的影响   总被引：1，自引：0，他引：1  

徐庆祥  卫星 《林业资源管理》2013,(2):64-70

以黑龙江省东北林业大学帽儿山实验林场尖砬沟森林培育实验站23a生水曲柳落叶松带状混交林为研究对象,测定对落叶松林带进行不同方式结构调整后水曲柳林带土壤理化性质的变化。结果表明:不同结构调整方式,对水曲柳林带土壤物理性质未产生显著影响,对土壤部分化学性质影响显著。去边行调整后水曲柳林带土壤,上层和中层的水解N含量显著大于其它调整及对照组对应层次的含量(P<0.05),上层的有机质含量也明显大于其它调整及对照组的含量(P<0.05)。对落叶松去边行与隔株去株和品字型均匀伐相比,去边行表现出更好的改土效果。  相似文献   

Fraxinus americana Roots Respond to Subsurface Feeding of Mycorrhizal Inoculum and Nitrogen Fertilizer     

《Journal of Sustainable Forestry》2013,32(2-3):93-102

Abstract

Ball and burlap Fraxinus americana (Autumn purple ash) trees were evaluated for their response to subsurface feeding of mycorrhizal inoculum with root biostimulant (mycorrhiza Roots) and nitrogen fertilizer (Coron 28-0-0) on difficult sites in the Colorado front range. Two root ingrowth cores were installed around each of twelve trees following planting in fall 1998 and excavated in fall 1999. Inoculation with mycorrhiza Roots alone resulted in sigificantly increased dry root weights and mycorrhizal colonization percentage on treated purple ash trees (p ≤ 0.05). Mycorrhiza Roots with Coron also significantly increased dry root weights and mycorrhizal colonization percentage on treated ash (p ≤ 0.05). Increases in root growth were dramatic. Purple ash trees treated with mycorrhiza Roots and Coron had greater than 3.5 times the dry root weights in excavated root ingrowth cores compared controls. Trees treated with mycorrhiza Roots alone had greater than 3 times the dry weights compared to controls. Trees treated with mycorrhiza Roots alone had more than 12 times higher mycorrhi-zal colonization percentage compared to controls. Control trees were poorly colonized by mycorrhizal fungi. This study indicates that subsurface feeding of purple ash ball and burlap trees following outplanting with mycorrhizal inoculum and root biostimulant can greatly improve root growth and mycorrhizal colonization.  相似文献   

重庆江合煤矿国家矿山公园矿业遗迹特征及建园意义探析     

李德万  杨乐  华建民  马传亮  廖云平 《安徽农业科学》2012,(19):10207-10208,10330

针对重庆市江合煤矿的资源枯竭及环境问题,实现矿业城市的经济模式转型和恢复原生态环境显得非常重要。在综合分析重庆江合煤矿国家矿山公园遗迹特征的基础上,结合国家级矿山公园的评选要求,全面深入地探讨了重庆江合煤矿国家矿山公园的建设意义,可为以后同类型矿山公园的建设提供宝贵参考。  相似文献   

短期恢复下高寒矿区煤矸石山土壤变化特征研究   总被引：1，自引：0，他引：1  

杨鑫光  李希来  金立群  孙华方 《草业学报》2018,27(8):30-38

植物-土壤的相互作用是生态恢复学的主要研究方向之一,明确植被恢复对土壤性质的影响程度,对于合理设计人工恢复措施等意义重大。本研究通过在高寒矿区煤矸石山人工种植垂穗披碱草、冷地早熟禾、星星草,研究不同恢复年限下土壤氮、磷、钾、有机质、pH值、植被盖度变化特征及各指标之间的相关性。结果表明,随着恢复时间的延长,土壤全氮含量与恢复当年相比差异不显著,土壤全磷含量逐步增加,土壤全钾含量逐步下降。恢复4年与恢复当年相比,土壤全磷含量增加了17.39%(P<0.05)、土壤全钾下降了12.77%(P<0.05)。土壤碱解氮、速效磷、速效钾含量均显著下降,恢复4年与恢复当年相比分别下降了49.68%(P<0.05)、66.07%(P<0.05)、18.67%(P<0.05)。与恢复当年相比,恢复2和4年后土壤有机质含量分别提高了7.92%(P<0.05)、43.02%(P<0.05),增加趋势明显。pH值随着恢复时间的延长逐步增加,土壤由酸性逐步向中性过度。人工建植2、4年后盖度未发生明显变化。相关性分析表明,除全氮含量以外,绝大部分土壤营养元素之间相关性显著,植被盖度与土壤pH值之间呈负相关。结合当前研究结果,在高寒矿区煤矸石山人工建植过程中,需及时补充速效肥料,以满足地上植物生长需求。  相似文献   

Response of Maize Roots to Different Additive Amounts of Weathered Coal Humic Acids     

ZHOU LiPing  YUAN Liang  ZHAO BingQiang  LI YanTing  LIN ZhiAn 《中国农业科学》2019,52(2):285-292

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城市垃圾焚烧炉渣重金属含量特征及其资源化利用途径     

刁玲玲  王帅  鲍清萍 《安徽农学通报》2012,18(24)

利用原子吸收光谱仪测定城市垃圾不同粒径焚烧底渣中重金属的含量，并分析了其资源化利用途径。研究结果表明，粒径小于5mm的底渣是主要成分，占整个底渣的59．42％。底渣中重金属的含量差别较大，其中Zn、cr和cu的含量明显高于其他重金属含量，而cd含量最低。底渣中重金属的含量都远远超过土壤环境保护标准（GB15618-1995）及当地土壤背景值。不同粒径底渣中重金属有较大差异，其中cr、zn、cd和Ni在小粒径中含量较高，而cu和Pb在各类粒径中含量分布不明显。  相似文献   

Assessment of an experimental phytase enzyme product on live performance,bone mineralization,and phosphorus excretion in broiler chickens     

《The Journal of Applied Poultry Research》2011,20(4):561-566

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