二级气浮+A/O法处理炼油废水

采用隔油-浮选-生化曝气的二级处理工艺处理某炼油废水.实践表明,两级浮选和A/O生化工艺可有效地去除有机物、NH3-N和TN,是目前国内较成熟的炼油废水处理工艺,处理后的污水水质达到<污水综合排放标准>一级标准及<石油炼制工业污水污染物排放标准>中一级一类标准,而且出水水质较稳定.     

大连开发区污水处理一厂升级改造工程

大连市开发区污水处理一厂原设计规模为7.5×104m3/d,处理工艺为A/O工艺,出水水质执行污水综合排放标准(GB 8978-1996)的二级标准。升级改造工程设计规模增至10×104m3/d,采用改良A2/O工艺,出水水质执行城镇污水处理厂污染物排放标准(GB18918-2002)的一级A标准。介绍了污水处理厂扩容改造的工艺方案选择、工艺流程、设计参数,目前该工程的部分构筑物已投入试运行,出水水质达到一级A标准。     

稠油污水生物处理实验研究

微生物通过培养和驯化后完全可以在稠油污水体系中生存,对稠油污水中的有机物有较好的生物降解作用。利用SBR活性污泥法处理油田稠油污水是可行的,能将污水中的COD降至150mg·L-1以下,达到标准GB8978 1996污水综合排放二级标准的要求。     

木糖生产废水处理工程实例

采用物化/ABR/UBF/好氧/混凝沉淀工艺处理木糖生产废水,运行实践表明,该工艺具有处理效果稳定可靠、对木糖废水中的COD、SO2-4、色度去除率高等特点.出水水质可达到污水综合排放标准(GB8978-1996)中一级排放标准.     

连续流砂滤池在城镇污水处理厂提标改造中的应用

广东省某城镇污水处理厂总设计规模为11×104m3/d,出水标准执行《城镇污水处理厂污染物排放标准》(GB18918-2002)一级B标准和广东省地方标准《水污染物排放限值》(DB44/26-2001)第二时段一级标准的较严值要求。为了使出水水质达到《城镇污水处理厂污染物排放标准》(GB18918-2002)一级A标准和广东省地方标准《水污染物排放限值》(DB44/26-2001)第二时段一级标准的较严值要求,需对该厂处理工艺进行升级改造。结合该厂实际运行的进出水水质和目前处理设施的运行情况,本工程采用精密格栅+连续流砂滤池工艺对二级出水进行深度处理,提标后出水满足水质要求。     

改良型A2/O工艺污水处理厂的设计与运行

某污水处理厂设计规模为5×104 m3/d,其污水处理工艺流程采用改良型A2/O工艺,污泥处理采用直接浓缩脱水工艺.对该工艺流程的主要构筑物、设计参数及运行情况进行了介绍,结果表明,处理后的水质达到《城镇污水处理厂污染物排放标准》(GB 18918-2002)中的一级标准.     

新型絮凝剂在油气田含油污水无害化处理的开发与应用

针对油田回注水水质悬浮物严重超标问题,本文试验选择塔里木油气田回注水为样本,对其悬浮物成分进行了精细分析,研究了回注水中絮凝剂,提高絮凝剂处理含油污水的作用效果,通过絮凝剂A剂加量优化试验,得出最佳A剂加量为190g/m3,絮凝剂B剂加量为60g/m3,对油田污水进行处理效果好,污水的透光率达到95%,处理后的污水达到排放标准。     

混凝-生物组合工艺处理高含盐稠油废水

对新疆油田高含盐稠油废水,采用"混凝-水解酸化-接触氧化"组合工艺进行处理。结果表明,在混凝段进水流量2.5～3.0 m~3/h,生物段进水流量1 m~3/h的条件下,该组合工艺对稠油废水COD_(Cr)、石油类和挥发酚的平均总去除率分别可达53.5%,77.95%和84.28%。稠油废水中氯离子浓度在5 000～11 000 mg/L范围内波动时,该组合工艺能够保持出水水质稳定,具有较强的抗盐度冲击能力。出水的各项水质参数均符合国家二级污水排放标准。     

天津某电子公司污水站改扩建工程实例

天津某电子公司污水处理系统处理设施能力不足,出水水质不能达到标准。采用隔油/气浮/A2O/过滤工艺对原有工艺及设备进行改造扩容后,系统能够水量由600 m3/d提高到1 600 m3/d,出水水质由《污水综合排放标准》三级提高到天津市污水综合排放标准（DB12/356-2008）二级。     

UASB-AO工艺在污水处理厂提标改造中的应用

某污水处理厂无法达到现行《城镇污水处理厂污染物排放标准》（GB18918-2002）一级A标准,为此对污水处理系统进行了改造,新建UASB池,结合原有的A/O池组成UASB-A/O组合工艺.UASB池可以提高后续A/O池的脱氮除磷效果,处理水质达到《城镇污水处理厂污染物排放标准》（GB18918-2002）一级A标准.     

Insect antifeedant properties of anthranoids from the genusVismia

Vismiones and ferruginins, representatives of a new class of lypophilic anthranoids from the genusVismia were found to inhibit feeding in larvae of species ofSpodoptera, Heliothis, and inLocusta migratoria.     

Many Drugs of Abuse May Be Acutely Transformed to Dopamine,Norepinephrine and Epinephrine In Vivo

It is well established that a wide range of drugs of abuse acutely boost the signaling of the sympathetic nervous system and the hypothalamic–pituitary–adrenal (HPA) axis, where norepinephrine and epinephrine are major output molecules. This stimulatory effect is accompanied by such symptoms as elevated heart rate and blood pressure, more rapid breathing, increased body temperature and sweating, and pupillary dilation, as well as the intoxicating or euphoric subjective properties of the drug. While many drugs of abuse are thought to achieve their intoxicating effects by modulating the monoaminergic neurotransmitter systems (i.e., serotonin, norepinephrine, dopamine) by binding to these receptors or otherwise affecting their synaptic signaling, this paper puts forth the hypothesis that many of these drugs are actually acutely converted to catecholamines (dopamine, norepinephrine, epinephrine) in vivo, in addition to transformation to their known metabolites. In this manner, a range of stimulants, opioids, and psychedelics (as well as alcohol) may partially achieve their intoxicating properties, as well as side effects, due to this putative transformation to catecholamines. If this hypothesis is correct, it would alter our understanding of the basic biosynthetic pathways for generating these important signaling molecules, while also modifying our view of the neural substrates underlying substance abuse and dependence, including psychological stress-induced relapse. Importantly, there is a direct way to test the overarching hypothesis: administer (either centrally or peripherally) stable isotope versions of these drugs to model organisms such as rodents (or even to humans) and then use liquid chromatography-mass spectrometry to determine if the labeled drug is converted to labeled catecholamines in brain, blood plasma, or urine samples.     

Methyl 2,4,6-decatrienoates Attract Stink Bugs and Tachinid Parasitoids

Halyomorpha halys (Stål) (Pentatomidae), called the brown marmorated stink bug (BMSB), is a newly invasive species in the eastern USA that is rapidly spreading from the original point of establishment in Allentown, PA. In its native range, the BMSB is reportedly attracted to methyl (E,E,Z)-2,4,6-decatrienoate, the male-produced pheromone of another pentatomid common in eastern Asia, Plautia stali Scott. In North America, Thyanta spp. are the only pentatomids known to produce methyl 2,4,6-decatrienoate [the (E,Z,Z)-isomer] as part of their pheromones. Methyl 2,4,6-decatrienoates were field-tested in Maryland to monitor the spread of the BMSB and to explore the possibility that Thyanta spp. are an alternate host for parasitic tachinid flies that use stink bug pheromones as host-finding kairomones. Here we report the first captures of adult and nymph BMSBs in traps baited with methyl (E,E,Z)-2,4,6-decatrienoate in central Maryland and present data verifying that the tachinid, Euclytia flava (Townsend), exploits methyl (E,Z,Z)-2,4,6-decatrienoate as a kairomone. We also report the unexpected finding that various isomers of methyl 2,4,6-decatrienoate attract Acrosternum hilare (Say), although this bug apparently does not produce methyl decatrienoates. Other stink bugs and tachinids native to North America were also attracted to methyl 2,4,6-decatrienoates. These data indicate there are Heteroptera in North America in addition to Thyanta spp. that probably use methyl 2,4,6-decatrienoates as pheromones. The evidence that some pentatomids exploit the pheromones of other true bugs as kairomones to find food or to congregate as a passive defense against tachinid parasitism is discussed.     

2007～2008年世界塑料工业进展

收集了2007年7月～2008年6月世界塑料工业的相关资料,介绍了2007～2008年国外塑料工业的发展情况,提供了世界塑料产量、消费量及全球各类树脂的需求量及产能情况.按通用热塑性树脂(聚乙烯、聚丙烯、聚苯乙烯、聚氯乙烯、ABS树脂)、工程塑料(尼龙、聚碳酸酯、聚甲醛、热塑性聚酯、聚苯醚)、特种工程塑料(聚苯·硫醚、液晶聚合物、聚醚醚酮)、通用热固性树脂(酚醛、聚氨酯、不饱和聚酯树脂、环氧树脂)不同品种的顺序,对树脂的产量、消费量、供需状况及合成工艺、产品应用开发、树脂品种的延伸及应用的进一步扩展等技术作了详细介绍.     

2005～2006年国外塑料工业进展

收集了2005年7月～2006年6月国外塑料工业的相关资料，介绍了2005—2006年国外塑料工业的发展情况。提供了世界塑料产量、消费量及全球各类树脂生产量以及各国塑料制品的进出口情况。作为对比，介绍了中国塑料的生产情况。按通用热塑性树脂（聚乙烯、聚丙烯、聚苯乙烯、聚氯乙烯、ABS树脂）、工程塑料（聚酰胺、聚碳酸酯、聚甲醛、热塑性聚酯、聚苯醚）、通用热固性树脂（酚醛、聚氨酯、不饱和树脂、环氧树脂）、特种工程塑料（聚苯硫醚、液晶聚合物、聚醚醚酮）的品种顺序，对树脂的产量、消费量、供需状况及合成工艺、产品开发、树脂品种的延伸及应用的扩展作了详细的介绍。     

Inorganic/organic nanocomposite coatings: The next step in coating performance

Inorganic/organic hybrid materials have considerable promise and are beginning to become a major area of research for many coating usages, including abrasion and corrosion resistance. Our primary approach is to prepare the inorganic phase in situ within the film formation process of the organic phase. The inorganic phase is introduced via sol-gel chemistry into a thermosetting organic phase. By this method, the size, periodicity, spatial positioning, and density of the inorganic phase can be controlled. An important aspect of the inorganic/organic hybrid materials is the coupling agent. The initial task of the coupling agent is to provide uniform mixing of the oligomeric organic phase with the sol-gel precursors, which are otherwise immiscible. UV-curable inorganic/organic hybrid systems have the advantages of a rapid cure and the ability to be used on heat sensitive substrates such as molded plastics. Also, it is possible to have better control of the growth of the inorganic phase using UV curing. It is our ultimate goal to completely separate the curing of inorganic and organic phases to gain complete control over the morphology, and hence optimization of “all” the coating properties. Thus far, it has been found that concomitant UV curing of the inorganic and organic phases using titanium sol-gel precursors afforded nanocomposite coatings which completely block the substrate from UV light while maintaining a transparent to visible light. Also, it has been found that the morphology of the inorganic phase is highly dependent on the concentration and reactivity of the coupling agent. Presented at the 82nd Annual Meeting of the Federation of Societies for Coatings Technology, October 27–29, 2004, in Chicago, IL.