分质预处理-混凝-水解酸化-生物接触氧化处理涂装废水

针对宁波市某电动车生产企业的涂装废水特点,采用Fenton氧化-混凝对喷漆废水预处理后,与电泳废水混合,再进行混凝-水解酸化-生物接触氧化处理。工程实践表明,该工艺可有效处理涂装废水,出水满足《工业企业废水氮、磷污染物间接排放限值》（DB 33/887-2013）和《污水综合排放标准》（GB 8978-1996）三级标准,同时满足企业内控标准。     

汽车涂装废水处理工程实例

汽车涂装工艺复杂,涂装废水具有污染物种类多,危害大,处理难度大。主要污染物成分为石油类、重金属、电泳漆等,本工程采用"预处理+缺氧+好氧+MBR"处理技术,使得出水水质达到《城镇污水处理厂污染物排放标准》(GB18918-2002)中一级A标准。     

“物化-生化”法处理汽车涂装厂废水的研究

某汽车涂装厂新建一套废水处理设施。针对废水水质特点,采用"物化-生化"法对涂装废水进行有效的处理,出水水质可达到《污水综合排放标准》(GB8978-1996)中二级排放标准的要求。涂装生产废水中的磷化废水含有重金属镍,属于一类污染物,采用石灰沉淀法对其进行单独的预处理。经济分析表明,处理1 m~3废水,废水设施运行费用约为3元。     

汽车涂装废水处理技术及工程实例

依据汽车涂装废水的水质特点,介绍了国内汽车涂装废水常用的处理方法,并对北京某重型汽车厂污水处理站的工艺设计、调试及运行效果进行总结。实践表明:物化-生化法可有效处理汽车涂装废水;依据废水中所含污染物的不同,对涂装工艺过程中排放的废水进行分质预处理可有效地去除磷酸盐、重金属离子、油类物质等污染物,减轻了后续处理单元的负荷,提高了处理效率。     

国内汽车涂装废水处理技术

汽车涂装过程中产生的废水主要分前处理废水、电泳废水和喷漆废水,其污染物为树脂、表面活性剂、磷酸盐等。废水的成分复杂,排放无规律,所以水质变化大。经实验证明:国内汽车涂装废水经过中和反应,气浮处理后,再采用水解酸化———生物接触氧化处理工艺进行处理后出水,经监测其各项指标可以达到《污水综合排放标准》GB8978-1996的一级排放标准。     

分质混凝-水解酸化-MBR工艺处理涂装废水

针对长春某汽车配件涂装车间生产废水的特点,对涂装前处理废水、电泳废水、喷漆废水分别进行分质混凝预处理,混合预处理的废水,再采用水解酸化-MBR进行处理。工程实践表明,采用各水质分别预处理再混合生化处理的方法可有效的处理涂装废水,出水水质达到GB 8978-1996中的一级标准。     

预曝气调节-混凝沉淀-序批式活性污泥法处理涂装废水

介绍一种涂装厂电泳线涂装废水的处理工程设计实例.通过预曝气调节-混凝沉淀-序批式活性污泥法的工艺处理该类废水,COD、BOD5、石油类、S的去除率分别达到86%、91.8%、69%、79.8%,出水各项指标均可达到污水综合排放标准(GB8978-1996)的一级排放标准.     

芬顿氧化+BAF在汽车涂装废水工程中的应用

随着我国对环境保护的日益重视,各类污染物排放要求也不断提高。某汽车零件涂装厂由于现有废水处理设备处理出水无法完全满足现阶段排放标准,需要进行改造,提高处理效率。该企业排放的涂装废水水质组成复杂、有机物含量高、可生化性较差,处理难度较高。对废水进行小试后,确定采用分质预处理+Fenton+BAF的组合工艺处理该废水,运行结果表明,该组合工艺对涂装废水有较高的处理效果,出水水质稳定达标,具有较好的抗冲击负荷能力,且占地面积较小、设备高度自动化,该工程对类似的涂装废水处理可提供设计参考。     

隔油-生化-消毒-景观塘处理餐具废水工程实例

介绍了隔油-缺氧-好氧-SBR-消毒-景观塘工艺处理餐具消毒废水,该工艺处理效果稳定,运行可靠、技术可行,工程验收合格后,污水经处理达到《城镇污水处理厂污染物排放标准》(GB18918—2002)一级B标准后排入景观塘,效益明显。     

涂装废水处理技术的研究进展

涂装废水是产品漆前表面处理、喷涂和干燥3道工序产生的废水,其污染物成分复杂,COD和重金属含量高,属于典型的高浓度难降解有机废水。讨论了涂装废水的常规处理和一些新型处理技术,比较了各种处理方法的优势与不足,指出了涂装废水处理技术的发展趋势,为涂装废水处理工艺选择提供参考。     

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.     

Direct observation of freeze-thaw instability of latex coatings via high pressure freezing and cryogenic SEM

Despite its industrial importance, the subject of freeze-thaw (F/T) stability of latex coatings has not been studied extensively. There is also a lack of fundamental understanding about the process and the mechanisms through which a coating becomes destabilized. High pressure (2100 bar) freezing fixes the state of water-suspended particles of polymer binder and inorganic pigments without the growth of ice crystals during freezing that produce artifacts in direct imaging scanning electron microscopy (SEM) of fracture surfaces of frozen coatings. We show that by incorporating copolymerizable functional monomers, it is possible to achieve F/T stability in polymer latexes and in low-VOC paints, as judged by the microstructures revealed by the cryogenic SEM technique. Particle coalescence as well as pigment segregation in F/T unstable systems are visualized. In order to achieve F/T stability in paints, latex particles must not flocculate and should provide protection to inorganic pigment and extender particles. Because of the unique capabilities of the cryogenic SEM, we are able to separate the effects of freezing and thawing, and study the influence of the rate of freezing and thawing on F/T stability. Destabilization can be caused by either freezing or thawing. A slow freezing process is more detrimental to F/T stability than a fast freezing process; the latter actually preserves suspension stability during freezing. Presented at the 82nd Annual Meeting of the Federation of Societies for Coatings Technology, October 27–29, 2004 in Chicago, IL. Tied for first place in The John A. Gordon Best Paper Competition.     

Ethanol and (−)-α-Pinene: Attractant Kairomones for Bark and Ambrosia Beetles in the Southeastern US

In 2002–2004, we examined the flight responses of 49 species of native and exotic bark and ambrosia beetles (Coleoptera: Scolytidae and Platypodidae) to traps baited with ethanol and/or (−)-α-pinene in the southeastern US. Eight field trials were conducted in mature pine stands in Alabama, Florida, Georgia, North Carolina, and South Carolina. Funnel traps baited with ethanol lures (release rate, about 0.6 g/day at 25–28°C) were attractive to ten species of ambrosia beetles (Ambrosiodmus tachygraphus, Anisandrus sayi, Dryoxylon onoharaensum, Monarthrum mali, Xyleborinus saxesenii, Xyleborus affinis, Xyleborus ferrugineus, Xylosandrus compactus, Xylosandrus crassiusculus, and Xylosandrus germanus) and two species of bark beetles (Cryptocarenus heveae and Hypothenemus sp.). Traps baited with (−)-α-pinene lures (release rate, 2–6 g/day at 25–28°C) were attractive to five bark beetle species (Dendroctonus terebrans, Hylastes porculus, Hylastes salebrosus, Hylastes tenuis, and Ips grandicollis) and one platypodid ambrosia beetle species (Myoplatypus flavicornis). Ethanol enhanced responses of some species (Xyleborus pubescens, H. porculus, H. salebrosus, H. tenuis, and Pityophthorus cariniceps) to traps baited with (−)-α-pinene in some locations. (−)-α-Pinene interrupted the response of some ambrosia beetle species to traps baited with ethanol, but only the response of D. onoharaensum was interrupted consistently at most locations. Of 23 species of ambrosia beetles captured in our field trials, nine were exotic and accounted for 70–97% of total catches of ambrosia beetles. Our results provide support for the continued use of separate traps baited with ethanol alone and ethanol with (−)-α-pinene to detect and monitor common bark and ambrosia beetles from the southeastern region of the US.     

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.     

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。     

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.