浅议两种屋面雨水收集利用系统

屋面雨水收集利用系统主要有两种:常规和绿色屋面雨水收集利用系统。基于常规屋面雨水收集利用系统的工作原理,阐述了屋面雨水的收集、处理和回用方法,提出了虹吸雨水系统应用于屋面雨水收集利用系统所具有的特点、难点及对策。基于绿色屋面收集利用系统的结构及工作原理,阐述了绿色屋面作为雨水处理环节的预处理单元所具有的削减洪峰流量和净化水质的潜能,并结合绿色屋面的功能和局限性,提出绿色屋面的价值应综合其生态、能源、美学、商业效益来考量。归纳了常规和绿色屋面雨水收集利用系统在结构、屋面雨水处理效果、应用方面的特性,对比了二者各自的优势与不足。     

绿色建筑的屋面雨水收集系统

文章通过对屋面雨水特点、屋面雨水的收集方式、方案及流程进行介绍和分析,结合集水面积的计算方式提出了储水设施的体积计算方法,并根据屋面雨水收集系统的实际特点,对其系统在绿色建筑的应用及推广提出了建议。     

屋面雨水收集系统

通过对雨水收集系统的分类,介绍了屋面雨水收集系统的特点和组成,提出了储水设施的体积计算方法,对系统的推广提出了建议。     

世博浦东场馆将建雨水回收系统

上海市水务局目前组织编制了《世博会地区市政用水规划》，明确世博会浦东场馆区内用水系统采用“双水源”，即屋面雨水和黄浦江双水源，雨水收集系统建成后，屋面雨水利用量达到10.97万立方米。     

厂区雨水回用的案例分析与建议

发电厂厂区雨水一般收集后排放,由于电厂其它下水道、排水沟的渗漏,影响了雨水水质。该文通过对雨水系统的回用管理,发现了生产过程中存在的问题,并进行了整改完善,实现了初步回用,同时提出了依托电厂灰渣库,建设雨水蓄水池进行深度利用的建议。     

厂区雨水回用的案例分析与建议

发电厂厂区雨水一般收集后排放,由于电厂其它下水道、排水沟的渗漏,影响了雨水水质。该文通过对雨水系统的回用管理,发现了生产过程中存在的问题,并进行了整改完善,实现了初步回用,同时提出了依托电厂灰渣库,建设雨水蓄水池进行深度利用的建议。     

城市雨水利用系统的模糊层次综合评价

为明确城市雨水利用系统的综合效益,以促进其在居住小区的推广应用,采用模糊层次分析法(F-AHP)建立了一种简单的雨水利用系统综合评价模型,分别对雨水收集回用和雨水下渗两种方案进行评价。结果表明,前者经济效益和社会效益均较好,后者环境效益显著。该模型为促进城市雨水利用系统的建设提供了科学依据。     

城市雨水收集利用研究现状与进展

当前国内许多城市都面临着水污染严重和水资源短缺的问题,雨水的收集利用已成为一种必然的趋势。对国内外雨水收集利用的法律法规建设、发展现状进行了综述,总结了雨水收集利用技术、现行的回用雨水的水质标准,以及雨水处理工艺。     

生活垃圾转运站初期雨水收集系统设计探讨

转运站的初期雨水因受生活垃圾的影响,COD、SS、BOD5超标,必须对其进行收集处理。初期雨水量可根据暴雨强度公式计算,同时初期雨水需与屋面雨水、其他区域地面雨水分管网收集后用泵提升至污水处理站进行处理。初期雨水池收集系统可根据需要选择自动控制或机械控制。     

广南高速服务区污水处理与回用工程设计

针对广南高速某服务区缺水问题突出、远离城市、工程性引入自来水造价惊人等问题,设计采用"地下水淡化+污水深度处理+中水回用+雨水补给"的全过程资源化利用模式。地下水经淡化膜系统净化处理后,达到GB5749-2006规定指标,可供服务区生活用水;然后,服务区产生的废水经污水处理系统处理后,达到GB 8978-1996中一级标准,设计处理量为140 m^3/d。中水回用系统对污水处理系统出水和收集雨水进行深度处理,使之达到GB/T18920-2002标准,根据最大用水量,中水回用系统处理量为200 m^3/d。增加雨水收集与利用系统,通过计算,设计处理量为50 m^3/d。     

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.     

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.     

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.     

Ethanol and (−)-α-Pinene: Attractant Kairomones for Some Large Wood-Boring Beetles in Southeastern USA

Ethanol and α-pinene were tested as attractants for large wood-boring pine beetles in Alabama, Florida, Georgia, North Carolina, and South Carolina in 2002–2004. Multiple-funnel traps baited with (−)-α-pinene (released at about 2 g/d at 25–28°C) were attractive to the following Cerambycidae: Acanthocinus nodosus, A. obsoletus, Arhopalus rusticus nubilus, Asemum striatum, Monochamus titillator, Prionus pocularis, Xylotrechus integer, and X. sagittatus sagittatus. Buprestis lineata (Buprestidae), Alaus myops (Elateridae), and Hylobius pales and Pachylobius picivorus (Curculionidae) were also attracted to traps baited with (−)-α-pinene. In many locations, ethanol synergized attraction of the cerambycids Acanthocinus nodosus, A. obsoletus, Arhopalus r. nubilus, Monochamus titillator, and Xylotrechus s. sagittatus (but not Asemum striatum, Prionus pocularis, or Xylotrechus integer) to traps baited with (−)-α-pinene. Similarly, attraction of Alaus myops, Hylobius pales, and Pachylobius picivorus (but not Buprestis lineata) to traps baited with (−)-α-pinene was synergized by ethanol. These results provide support for the use of traps baited with ethanol and (−)-α-pinene to detect and monitor common large wood-boring beetles from the southeastern region of the USA at ports-of-entry in other countries, as well as forested areas in the USA.