千岛湖城西污水处理厂提标改造和中水回用工程开始施工

为不断加大千岛湖环境保护力度,切实提升千岛湖镇城市品位,千岛湖建设集团快速推进千岛湖镇污水处理厂提标改造和中水回用工程项目。该工程主要包括城西和南山污水处理厂两部分设施及管网,其中城西污水处理厂深度处理提标改造系统规模为2万t/d,一期建设1万t/d,中水回用规模为1 200 t/d,中水回用管道长13.6 km,城西设施占地约2 891 m2,项目总投资约为2 400万元。     

平顶山市中水回用工程分析

中水回用是解决城市水资源短缺的重要途径.以平顶山市污水处理厂中水回用工程为例,对现有的中水回用工程的流程设计、主要构筑物选择、技术经济进行了分析探讨,并对今后扩大中水回用的范围进行分析,对更大范围推广回用中水提出建议.     

佛山市某污水厂技改工程实例

介绍了佛山某污水处理厂技改工程的工艺流程和设计参数。在用地紧张的条件下,改造原有构筑物,新建“深度处理+超滤反渗透+浓水处理”为主体工艺的中水回用系统。实际运行结果表明,技改后满足扩容减排的政策要求,出水水质稳定达标排放,为类似污水处理厂的技改提供了相关设计经验。     

双膜法在印染废水深度处理中的应用

广东省某印染工业园污水处理厂废水深度处理及回用采用超滤加反渗透双膜法工艺,该工艺产水作为生产与生活用水而回用。实际运行结果表明,超滤结合反渗透的双膜法水处理工艺能有效去除污水中的有机物,悬浮物(SS)和各种阴阳离子。出水水质能够达到印染行业中水回用水质指标,从而节约大量新水,产生了良好的经济效益和环境效益。     

山东邹县中水回用一箭数雕

华电国际邹县发电厂不但是煤炭消耗大户、一年烧掉1000万t煤炭,而且也是耗水大户。一年要蒸发掉3000万t自来水。而与之不远处的邹县城市污水处理厂自运行以来,每天要花10万元资金。处理后的中水却白白排放到河里。为实现中水回用,邹城市污水处理厂与华电国际邹县发电厂合作投资6000万元建成了中水回用工程。邹县中水回用工程投运后,邹城市污水处理厂每天可向邹县发电厂输送6万t中水。     

我国城市中水回用于工业循环冷却水的现状及建议

城市中水由城市污水处理厂的排放水再经深度处理而得,城市中水回用是指无需经企业再次处理的直接回用.作者对我国城市中水回用的现状进行了分析,指出了理论、技术及标准等多方面的问题对城市中水回用的制约,提出为做好城市中水回用工作需要在理论创新、技术进步及新标准建立等几方面开展工作的建议.     

山东省济宁市污水处理工程

山东省济宁市污水处理厂建设污水深度处理及中水回用工程，该工程污水深度处理改造20万m^3/d、中水回用8万吨／日以及相关的配套管网。目前该项目已由有关部门批准，预计2007年动工。     

杭州七格污水处理厂中水回用工程工艺设计

根据杭州市七格污水处理厂尾水水质情况,本文采用先进的多介质过滤器+自清洗过滤器+UF+RO的处理工艺,对该尾水进行3500m3/d的中水回用工程的工艺设计。并对各个工艺进行了详细描述,为杭州市污水处理厂的尾水回用工程提供理论参考。     

上海城镇污水处理厂尾水再生利用潜力分析

城镇污水处理厂尾水再生利用是解决水资源短缺的有效途径之一。文章介绍了我国再生水利用发展历程，系统梳理了上海市城镇污水处理厂概况，重点分析了上海市城镇污水处理厂尾水潜在再生利用途径和尾水再生利用处理技术，以论述上海市城镇污水处理厂尾水再生利用的潜力，以期为上海市城镇污水处理厂尾水再生利用的发展和推广应用提供参考。经分析，上海市城镇污水处理厂尾水可再生回用于工业用水、农田灌溉用水、环境用水和城市杂用水，并且这些潜在用户对再生水的需求远高于上海市每年需回用的再生水量。但因不同再生水用途对水质要求各不相同，在实际应用过程中，需结合意向再生水利用途径、进水水质情况等因素，对技术单元进行有机组合，以保障再生水水质。     

化工园区污水处理厂设计中应注意的几个问题

指出化工园区污水处理厂在设计过程中,仅遵循现有的城市或单个化工项目污水处理的设计规范是不够的,其规模确定、进水水质、调节池设计、中水回用、运行方式、厂址选择、污泥处置及事故应急等方面都值得研究和探讨.提出了具体做法.     

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。