高速纤维过滤技术在城镇污水厂提标改造中的应用研究

考察高速纤维过滤技术对污水处理厂二级出水的深度处理效果,以及研究在不同加药量、滤速条件下的处理效果。结果表明,该污水处理厂的深度处理工艺宜采用混凝沉淀-过滤工艺; PAC投加量应保证Al与污水中TP的质量比不低于4.4;在滤速为25.00～41.67 m/h时,高速纤维过滤塔的水头损失在0.003～0.005 MPa范围波动;处理出水TP质量浓度基本在0.5 mg/L以下,高速纤维过滤塔对SS的去除率基本在90%以上。混凝沉淀和高速纤维过滤技术可作为该污水处理厂提标扩建的深度处理工艺。     

深度处理含油污水的试验研究

采用"强化混凝一多介质过滤-超滤-反渗透"处理工艺,对齐鲁石化污水处理厂出水进行深度处理试验研究,结果表明:在浊度、COD、油浓度波动较大的情况下,该处理工艺抗冲击负荷能力强、运行稳定,出水水质均符合循环冷却水系统补充水的要求.     

气相色谱-质谱法分析隔油絮凝处理后兰炭废水中有机污染物

采用气相色谱-质谱法测定经过隔油-絮凝处理后兰炭废水中有机污染物,结果表明,该废水中含大约30种有机物,主要有机物为酚类,达到50％以上,另外还有烃类、醇、酯类及少量的酸、芴等化合物.该研究为兰炭废水深度处理工艺路线的选择提供了水质分析依据.     

印染厂生产废水处理工程实例

针对印染生产废水的水质特点及原有处理工艺的处理思路,采用2套废水处理工艺分别对有色印染废水和无色废水进行处理.在保留原有色废水主体处理工艺的基础上,对其进行工艺的优化并增加其处理规模;由于原无色废水处理工艺存在严重的技术问题,重新设计无色废水废水处理工艺,采用中和絮凝沉淀-ABR-生物接触氧化-混凝过滤-消毒组合工艺时无色印染废水进行处理.运行结果表明,2套废水处理工艺出水均达到了纺织染整工业水污染物排放标准GB4287-1992一级排放标准.该工程的废水分类处理方法,对同类废水的处理工程有一定借鉴意义.     

铅酸蓄电池废水处理的工艺研究

采用二级中和+沉淀+回调+三级过滤的深度处理工艺对铅酸蓄电池厂的铅酸废水进行处理。详细介绍了处理工艺、主要设备、配套设施、调试运行,并指出本工艺的关键:一是设置二级中和pH调节槽来实现pH值的精确控制;二是通过溶药配药装置来保证药剂所配浓度的稳定性;三是通过机械过滤器、活性炭过滤器、纤维过滤器三级过滤进行深度处理。工程运行情况表明该工艺的组合是可行的,出水水质可达《电池工业水污染物排放标准》(GB 30484—2013)中排放限值的要求,严于以往工艺可以达到的《污水综合排放标准》(GB8978—1996)一级标准。     

小型电镀厂废水处理技术介绍

介绍调节、加药还原、加药絮凝、澄清、过滤的工艺处理小型电镀厂废水,出水水质达到GB8978-1996一级标准。该处理工艺具投资省,效果显著,运行成本较低等优点。     

电镀厂高浓度废水资源化深度处理研究

论述了电镀废水的来源和危害,并以某电镀废水处理工程为例,介绍了该电镀废水的处理工艺,主要采用药剂还原-沉淀法。该电镀废水经深度处理后回用,并对含铬污泥进行回收,实现资源化利用。     

炼油污水的深度处理技术研究

提出了一个经济合理的炼油污水深度处理工艺,即“浮选-生物过滤-臭氧催化氧化-高效过滤”。对抚顺石化分公司污水场生化二沉池出水进行了中试处理试验,研究结果表明,出水的主要几项污染指标COD、油、浊度有明显的降低,可达到用于工业用水的要求。试验效果比较理想,该处理工艺具有很好的经济和社会效益。     

油田采油废水处理工艺改造

通过对油田采油废水原有处理工艺所存在问题的分析,在充分利用现有设施的前提下,提出了工艺改造路线,包括高效混凝处理技术、高效冷却工艺、吸油除油技术,最后把关工艺是生物滤池过滤.结果表明,该油田废水通过改造后的废水处理系统处理后,出水水质达到了污水综合排放标准(GB8978-96)二级标准.     

三级深度脱氮除磷工艺及净化效果研究

为探索多级污水深度处理工艺中氮、磷的去除效果,采用生物滤池-植物湿地-活性炭过滤三级工艺组合,在人工模拟废水的基础上,探索各处理单元对污水中氮、磷的去除效应。结果表明,经过三级深度处理后出水中总氮、总磷、COD等污染物有明显的降低,且各单元都能起到一定的去除作用。该实验条件下,经三级单元处理后总磷的去除率达到67.47%~90.18%,铵态氮去除率在89.23%~99.89%,而且去除效能稳定,出水铵态氮基本保持在1mg/L以下;总氮去除率在85.02%~99.60%,整个三级组合工艺对总氮的去除效果良好;COD去除率为84%~97.33%。可见采用生物膜滤池-湿地植物-活性炭过滤三级深度组合处理工艺对污水中氮、磷等污染物表现较好的去除作用,该组合工艺可以用于污染物含量类似的污染水体深度处理之中。     

乙苯,苯乙烯的生产及合成乙苯,苯乙烯催化剂的研究进展

苯乙烯是重要的石油化工原料。本文介绍了国内外苯乙烯生产的发展概况，合成乙苯，苯乙烯所用的催化剂种类，并就苯乙烯生产及催化剂的发展趋势提出了自己的观点。     

Synthesis and characterization of homopolymers and copolymers of various acrylates and acrylonitrile

Various homopolymers and copolymers of methyl acrylate, ethyl acrylate, butyl acrylate, and acrylonitrile in different feed ratios were synthesized. These were characterized by IR, ¹³C-NMR, DSC, DTA, and TGA. Spectroscopic characterization helped in differentiating copolymers of different mol ratios. Thermal analysis revealed different degradation patterns for homopolymers and copolymers. The temperature and energy changes associated with various phase transitions were dependent on the chemical composition of homo- and copolymers, as expected. © 1993 John Wiley & Sons, Inc.     

生物质气化及生物质与煤共气化技术的研发与应用

总结了生物质原料的特点及生物质单独气化的缺点;介绍了国内外生物质气化技术及生物质与煤共气化技术的研发与应用现状;分析了在此领域国内外的发展趋势与前景;概括了开展生物质与煤共气化技术研发的意义。     

Comparison of the Adhesion and Cohesion of Triblock and Random Copolymers of Styrene and Butadiene

A substantially greater detachment energy is required to strip a polyethylene tereph-thalate (Mylar) film from a styrene-butadiene-styrene (SBS) triblock copolymer compared to that for peeling from a random styrene-butadiene (SBR) copolymer. This is true even though the intrinsic interaction between the Mylar and each elastomer is expected to be similar because of their virtually identical chemical composition. It is proposed that this difference in peel strength (between the SBS and SBR) is a consequence of the much higher dissipative capacity of the former elastomer. Another manifestation of this is the higher cohesive tear strength of the SBS compared to the SBR. Extents of energy dissipation within each elastomer during detachment of the Mylar adherend are consistent with the hypothesis that the average maximum stress experience before detachment is some similar fraction of each elastomer's tensile strength.     

责任和责任心的涵义与结构

责任是人应主动承担的角色义务和对其因过失所造成后果应承担的责罚.有两层涵义:一是义务;二是后果.责任心是个体自觉做好分内事务和履行道德义务的心理倾向,是个性心理品质成分中自我特征维度上的重要内容.责任心具有两个方面的涵义:一是角色分内职责;二是角色道德义务.责任心是一种通过责任认知、责任个性和责任适应的动态形式表现出来的静态品质,责任心是责任心过程结构与责任心关系结构相互制约、相互影响的统一体.     

二甲基二烯丙基氯化铵和丙烯酰胺的合成及应用

用复合引发体系(过硫酸盐-偶氮类引发剂)和脂肪胺类氧化还原体系引发,在实验室获得了单体转化率≥98%,特性粘数高于13.6 dL/g的阳离子共聚物PDA,探讨了控制聚合物分子量的影响因素.     

Kinetics and Mechanism of Oxidation of Mono- and Polyacetals

Abstract

Kinetics and mechanisms of oxidation of 6 acetals by molecular oxygen and ozone in liquid phase have been studied. Reaction with molecular oxygen (70°C, 15–16 hr) leads to the formation monoethers of the corresponding glycols with 68–90% selectivity. Salts of metals and complexes with crown-ethers have increased the reaction rate significally. Ozone have reacted with acetals with formation similar products. The mechanisms of intermediate stages have been proposed.     

钾盐资源及钾肥供需情况分析及预测

阐述了国内外钾盐资源及钾肥生产现状,对国内外钾盐的供需形势进行了分析及预测,从资源、原材料、国际市场三方面提出了解决我国钾盐短缺的措施。     

Electronic structures and reactivities of monometallic and bimetallic clusters of Au and Cu

The variation of the Au 4f binding energy of Au clusters with the cluster size has been established by measuring the binding energies of clusters whose size distributions were independently determined by HREM and STM. The binding energy increases significantly when the cluster size is less than 2 nm. Au-Cu bimetallic clusters of the composition Cu₃Au have been deposited for the first time on carbon substrates. The shifts in the core level binding energies of the bimetallic clusters show the effect of alloying in the case of large clusters, but show effects of both alloying and cluster size in the case of the small clusters. The interaction of CO with Cu₃Au clusters is stronger than with a bulk Cu metal. The interaction of CO with small Cu clusters also seems to be stronger than with bulk Cu or with large Cu clusters.