陶粒生物滤池-纤维球过滤器工艺处理小区生活污水

某小区位于广州市白云区,该小区采用陶粒生物滤池-纤维球过滤器工艺处理生活污水,运行结果表明,该工艺处理效果好,污水处理后能达到《城镇污水处理厂污染物排放标准》(GB18918-2002)一级A标准。采用该工艺处理小区生活污水占地面积小、工艺流程简洁,运行管理方便,出水水质好且稳定,并且该污水处理工程能与生态小区周围环境相协调。     

生物活性炭处理小区模拟生活污水的试验研究

为了实现小区生活污水中水回用,采用生物活性炭对模拟小区生活污水进行处理。通过研究挂膜阶段和稳定运行阶段出水的COD、NH3-N、PO34-、pH等指标来考察生物活性炭对污水的处理效果。实验结果表明:系统运行16 d后,生物膜基本成熟,对COD及氨氮的去除率在75%以。稳定运行阶段,该系统对COD、NH3-N、PO34-的去除率均达到80%以上,出水COD、NH3-N及PO34-的浓度分别稳定在50 mg/L、1 mg/L及4 mg/L以下,出水水质符合《城市污水再生利用城市杂用水水质》(GB/T 18920-2002)中的排放标准。     

两级曝气生物滤池-反硝化生物滤池处理生活污水

采用两级曝气生物滤池-反硝化生物滤池的组合工艺处理生活污水。工程运行结果表明,出水水质能够达到GB 18918—2002《城镇污水处理厂污染物排放标准》规定的一级A标准的要求。该工艺的主要特点是占地面积小,不设置沉淀池,节省基建投资,自动化程度高,处理效率高等,适用于城市生活污水及某些工业废水的处理。     

旋转接触氧化工艺处理度假区污水回用的设计及运行

采用旋转接触氧化工艺处理某度假区污水,用于度假区内景观水体用水,自假区开园投产以来系统运行性能良好,出水水质优良,对景观水体无不良影响。系统运行能耗低,占地面积小,启动迅捷简便,管理简单,运行费用低,表明旋转接触氧化工艺是处理以排放生活污水为主的小区污水的良好技术。     

光伏废水处理工程设计

山西省某光伏企业采用生物接触氧化-混凝沉淀工艺处理企业生产废水和厂区生活污水。经调试运行,出水水质达到污水综合排放标准(GB 8978-1996)中的一级排放标准。工艺可行且管理方便,运行费用低,处理效果稳定。     

住宅小区污水处理厂设计总结

介绍了东莞市某生活小区污水处理厂工程设计的情况,总结了应用生物接触氧化工艺处理住宅小区生活污水的工程经验。实践表明：该工艺运行可靠,操作简便,出水各项污染物指标均达到了国家规定的排放标准。     

石化码头污水处理

介绍了广州石化码头污水处理设计工艺,指出了运行中存在的问题。针对现有水质、水量的特点,优化及简化了操作工艺。运行结果表明,采用隔油/生物接触氧化工艺可有效处理石油库区的污水,处理后的污水水质达到《污水综合排放标准》(GB8978-1996)一级标准,而且出水水质较稳定。     

某新建小区生活污水回用处理工程

采用＂倒置式A2/O（缺氧-厌氧-好氧）＋微混凝＋过滤＋二氧化氯消毒＂结合的工艺,处理某新建小区生活污水,通过脱氮除磷和消毒等深度处理,出水水质达到《城市污水再生利用城市杂用水水质》（GB/T18920-2002）标准中城市绿化再生水质的指标,用作小区绿化补水,实现了中水回用和小区生活污水的零排放,体现了循环经济的理念。     

生物炭-臭氧技术在中水处理中的应用

采用生物炭-臭氧工艺对生活污水进行深度处理.通过实验研究分析了该工艺的原理、特点及最佳设计参数.工程实践表明,生物炭-臭氧工艺应用于中水处理中,当臭氧投加量(以污水计)为5g/m3、接触时间为10min时,系统出水水质稳定,不仅得到优质的中水,而且其出水色度、臭味等指标优于中水水质指标,且运行成本较低.     

生物接触氧化处理生活污水

应用生物接触氧化处理生活污水。运行表明,该方法处理生活污水效率高、出水水质稳定,运行成本低,容积负荷高、维护管理方便,可取得良好的社会环境效益。     

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。