厌氧-气浮-A/O接触氧化工艺处理洗毛废水

介绍了厌氧-气浮-A/O接触氧化工艺处理洗毛废水的应用情况。在进水CODcr和BOD5分别达到26565mg/L和6478mg/L的情况下，出水平均值分别为50.58mg/L和9.82mg/L，平均去除率均达到99.8%。     

生物医药废水处理的工程应用

采用隔油+水解酸化+IC两相厌氧+SBR生化+气浮+砂滤工艺处理生物医药废水。设计规模100 m3/d,该工艺对生物医药废水有较好的处理效果:对CODcr的平均去除率大于95%,BOD的平均去除率大于95%,SS去除率大于70%,动植物油去除率大于92%,处理后废水CODcr≤100 mg/L,BOD≤20 mg/L,动植物油≤5 mg/L,满足废水排放要求。该工艺为生物医药废水的有效处理提供新思路。     

靛蓝染纱废水处理工艺设计

采用中和沉淀－催化氧化－二段生物接触氧化工艺处理靛蓝生产废水,工程运行结果表明,在废水CODcr、BOD5、S^2-分别为2000mg/L、600mg/L、100mg/L的条件下,排出水的CODcr、BOD5、S^2-分别为100mg/L、30mg/L、1mg/L,符合排放要求。     

蔗渣喷淋废水处理研究

对甘蔗渣喷淋高浓度有机废水进行了厌氧、厌氧-好氧联合处理的实验研究。结果表明:当废水进水pH值在7.5,CODCr和BOD5的质量浓度分别在6500～10000mg/L和4000～6500mg/L时,经过厌氧处理后,CODCr和BOD5去除率能达到90%和94%;经过厌氧-好氧处理后,CODCr和BOD5去除率均能达到95%以上,取得了显著的效果。     

高级综合稳定塘处理养猪场废水

针对大型规模化养猪场污水污染负荷高，行业利润水平低的特点，采用高级综合稳定塘工艺对广州市某养猪场的废水进行处理。实际运行结果表明，在废水CODcr为15899mg/L、BOD5为10840mg/L、氨氮为1283mg/L和SS为3024mg/L的条件下，出水CODcr为71．5mg/L、BOD5为23mg/L、氨氮为66．5mg/L和SS为34mg/L，达到畜禽养殖业污染物排放标准(GB18596-2001)的要求。     

A/O/BAF工艺处理日化厂废水回用工程实例

采用"厌氧——接触氧化——曝气生物滤池"组合工艺处理日用化工废水。废水CODcr从进水1000 mg/L左右降到50 mg/L以下,BOD5从进水400 mg/L左右降到10 mg/L以下,处理效率均达到了95%以上,出水水质达到《城市再生利用水回用标准》GB/T 18920-2002。通过工程的长期实际运行表明,高效的厌氧系统和曝气生物滤池深度处理系统是该工艺处理稳定的关键。     

水解酸化/延时曝气工艺处理印染废水

采用水解酸化+延时曝气生物工艺处理印染废水,在水量为3000m3/d(125m3/h),进水CODcr为1800 mg/L,BOD5为700mg/L,SS为300mg/L,色度为1024倍的情况下,先采用混凝沉淀池先对印染废水进行处理,去除大部分SS和一定的色度之后进入水解酸化池(A池),进行厌氧处理,降低有机物含量,最后进入延时曝气池(O池),进一步除去CODcr、BOD5,最后再次用混凝沉淀工艺,进一步去除色度和降低废水的COD值,确保废水的色度和COD指标达标,污水经处理后达GB8978-1996一级排放标准。     

502胶水生产废水的处理

采用化学氧化、隔油、厌氧、好氧、活性炭吸附方法处理α-氰基丙烯酸乙酯(502胶水)。当废水的CODCr,BOD5的质量浓度分别为1480mg/L和345mg/L时,排水的CODCr,BOD5的质量浓度分别为48.5mg/L和<2mg/L,处理费用为4.95元/m3。     

印染废水处理新技术

采用CSBR工艺处理印染废水,在平均进水水质CODcr为1200 mg/L,BOD5 350 mg/L,SS 200 mg/L,色度400倍时.其去除率分别为90%、94%、91%和85%,出水可达到国家<纺织染整工业水污染物排放标准>(GB 4287-1992)二级排放标准.     

毛巾厂印染废水的处理

采用厌氧水解酸化-生物接触氧化-气浮工艺处理毛巾厂印染废水。工程运行表明,在进水SS,CODCr,BOD5的质量浓度分别为752mg/L,1326mg/L,563mg/L的情况下,排水的SS,CODCr,BOD5的质量浓度分别为59mg/L,76mg/L,10.6mg/L。     

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.     

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。