槐糖脂生物表面活性剂的结构特征及理化性质初探

通过摇瓶培养实验,考察了假丝酵母菌（Candida bombicola）ATCC 22214以葡萄糖和油酸双底物为碳源,采用一次加料培养和分批补料培养方式进行发酵制备槐糖脂的过程,并利用高效液相色谱/电喷雾飞行时间质谱联用仪确定了所产槐糖脂的结构,初步研究了其主要的理化性质.结果表明,一次加料培养中,该菌株生长稳定期的...     

一株中度嗜盐淀粉酶产生菌的分离鉴定及酶活测定

为开发极端环境工业用酶,从新疆盐碱土微生物中分离得到一株中度嗜盐高产淀粉酶活性菌株H3,其能耐受30%盐浓度和pH 11的极端环境.通过形态特征、生理生化实验及16S rRNA基因序列分析,确定H3属于Gracilibacillus属.该菌株能在盐浓度为0~30%的培养基上生长,最适生长盐浓度为5%~10%,最适pH值为8.5.在最适生长盐浓度、pH条件下,其淀粉酶活性可达到4 830个活力单位,可用于高盐高碱环境下淀粉的水解.     

高速铁路隔振沟的隔振效应研究

结合工程实例,利用Ansys大型有限元通用软件对高速铁路隔振沟的隔振效应进行了数值模拟,分析了不同深度和宽度下隔振沟的隔振性能。研究表明,隔振沟的深度对隔振效应影响很大,隔振沟越深,隔振效果越明显;而隔振沟的宽度对隔振效应影响很小。最后,结合施工要求与经济条件,给出了高铁隔振沟的合理尺寸取值。     

厌氧氨氧化技术处理高浓度氨氮工业废水的可行性分析

厌氧氨氧化(Anammox)技术是一种新型自养生物脱氮工艺,处理低C/N比、高浓度氨氮废水具有突出优势.本文总结了厌氧氨氧化技术的应用现状和不同工业行业高氨氮废水的水质特征,分析了氨氮、有机物等因素对厌氧氨氧化菌的影响,讨论了厌氧氨氧化技术处理高氨氮工业废水的可行性,最后对其在工业废水处理领域的研究重点做出了展望.     

单级高速离心风机在350MW燃煤电厂烟气脱硫工艺节能改造中的应用

火力发电厂脱硫氧化风机常采用罗茨鼓风机,但其存在效率低、能耗高、噪声大的不足。单级高速离心鼓风机以其环保、高效、低噪等优势在市政水处理中得到大量应用,但在脱硫中很少使用。通过工艺对比和对单级高速离心鼓风机替代罗茨风机进行可行性分析并完成改造。改造后结果表明:单级高速离心鼓风机完全可替代脱硫罗茨风机,可实现节能,同时不改变脱硫石膏的品质,且可降低噪声水平。     

Adsorption of naphthalene onto a high-surface-area carbon from waste ion exchange resin

A high-surface-area carbon (KC-1) was prepared from waste polystyrene-based ion exchange resin by KOH activation and used for naphthalene adsorption. The carbon exhibited a good hydrophobic nature with developed porous structure, favoring the adsorption of organic compounds. The Brunauer-Emmett-Teller surface area and total pore volume of KC-1 were 3442.2 and 1.68 cm 3 /g, respectively, which can be compared with those of KOH-activated carbons prepared from other precursors. Batch experiments were carried out to investigate the adsorption of naphthalene onto KC-1. The equilibrium data were analyzed by the Langmuir, Freundlich, and Polanyi- Manes isotherms and agreed with the Polanyi-Manes Model. The adsorption of naphthalene depended greatly on the porosity of the carbon, and the dispersive interactions between naphthalene and carbon could be relatively weak. The pH variation in aqueous solution had little effect on the adsorption process. The equilibrium time for 0.04 g/L of carbon dose was around 5 hr. Different models were used to evaluate the kinetic data and the pseudo second-order model was suitable to describe the kinetic process of naphthalene adsorption onto KC-1. Regeneration of spent carbon could be carried out effectively by alcohol treatment. The results indicated that KC-1 was a promising adsorbent for the removal of polycyclic aromatic hydrocarbons from aqueous solutions.     

Synthesis of the starch grafting of superabsorbent and high oil-absorbing resin

The graft copolymerization of the starch and acrylic were used to prepare the superabsorbent, and the high oil-absorbing resin was also studied preliminarily. In addition, following the method of the emulsion polymerization, the cerium nitrate amine was regarded as the initiator, the acrylic amide and the methyl methacrylate functioned as the monomer. There are several significant parameters taken into consideration such as the factors that influence the performance of the superabsorbent and the high oil-absorbing resin, the dosage of the initiator amount, the ratio of the starch and the monomer and the dosage of crosslinking agent.     

乙醇胺废水处理的实验分析

通过培养和驯化酸化污泥、好氧污泥,对乙醇胺废水中的COD和氨氮进行降解试验,考察微生物降解乙醇胺废水中的COD和氨氮效果。     

高能装药飞行器试验安全风险分析

目的梳理分析高能装药飞行器试验场试验安全影响因素,以提高试验安全性。方法利用危险性预先分析方法 PHA对高能装药飞行器试验场技术准备进行危险源辨识分析,利用爆炸相似律相关经验公式计算飞行器爆炸冲击波超压。结果分析获得了飞行器安全事故的主要原因,重点针对试验操作人员、技术文书、仪器工具、试验环境等进行了风险源辨识分析,计算获得了不同装药量飞行器的意外爆炸安全距离。结论可为试验过程中飞行器潜在风险降低及防护措施改善提供技术支撑。     

涝渍地种植制度与高效农业模式研究

采用了系统工程，生态农业，农业气象，作物栽培，技术经济等管理，通过对江汉平原涝渍地农田生态系统生产性能解析，现有种植制度与新拓高效农业模式分析评价，高效优化机理的探讨，从适应国内外市场需求，有利于农业结构调优，保护资源环境，促进农业可持续发展出发，筛选归纳了四类适宜的高效种植（养）模式，即“稳粮兴油”增值型；“稳棉机动”增值型；“粮经，粮饲兼顾”饲养型；“种地与养地”结合型。上述高效农业模式具有产品优化功能，结构优化功能，缓和大范围洪涝和自我调控补偿功能，它们既自成体系，各显特色，又互成体系，构成粮，经，饲，肥“四元”种植结构。必须实行有序高效模式自身水旱轮作，高效模式与传统耕作制度之间轮作换荐，使之动态优化，保持可持续发展。4种模式在我国南方涝渍地域具有广阔的推广前景，各地可因地制宜进行推广。