SBR-气浮工艺处理食品生产废水

采用SBR-气浮工艺处理食品生产废水,当进水CODCr≤1400mg/L,BOD5≤600mg/L,BOD5/CODCr为0.4～0.5时,处理出水CODCr≤100mg/L,BOD5≤30mg/L。工程实践表明该处理系统具有处理效果稳定,运行管理简便,运行费用低等优点。     

SBR—气浮工艺处理食品生产废水处理

采用SBR－气浮工艺处理食品生产废水，当进水CODCr≤1400mg/L,BOD5≤600mg/L,BOD5/CODCr为0.4-0.5时，处理出水CODCr≤100mg/L,BOD5≤30mg/L。工程实践表明该处理系统具有处理效果稳定，运行管理简便，运行费用低等优点。     

物化/厌氧水解/生物强化脱色处理印染废水

介绍了某印染废水工程实例,针对该工程废水的特点,设计采用物化沉淀—厌氧水解—生物接触氧化—曝气生物滤池组合工艺进行处理。在好氧生化阶段接种强化脱色菌,强化生物脱色效果。运行结果表明,进水CODCr为1 500 mg/L、BOD5为350 mg/L、色度为1 000倍时,处理出水水质为CODCr≤80 mg/L、BOD5≤25 mg/L、色度≤40倍,优于《纺织染整工业水污染物排放标准》(GB 4287—1992)的一级排放标准要求。     

反硝化组合工艺在污水深度处理中的应用

由于排放标准的提高,某石化企业污水二级生化装置排水,进入深度处理装置再处理,该深度处理装置采用"反硝化滤池+臭氧+生物活性炭滤池+高密度沉淀池"的工艺,处理后污水水质达到CODCr≤30mg/L、氨氮≤2mg/L、总氮≤15mg/L、总磷≤0.3mg/L.装置投运后运行较为平稳.2020年大修后,CODCr去除率为74...     

升流式厌氧污泥床(UASB)与间歇式活性污泥法(SBR)联合工艺在饮料生产废水处理工程中的应用

针对饮料生产废水的来源及其特点,采用升流式厌氧污泥床(UASB)与间歇式活性污泥法(SBR)联合工艺处理陕西某饮料公司的饮料生产废水。进水水质中CODCr为2 000 mg/L、BOD5为1 350 mg/L、SS为215 mg/L、pH为5~12;出水水质要求达到CODCr≤80 mg/L、BOD5≤20 mg/L、NH3-N≤12 mg/L、pH为6～9,即渭河水系(陕西段)污水综合排放标准BD 61/224—2006中的一级标准。该文通过介绍处理工艺流程、工艺设计参数,反应器的启动运行及工艺运行结果,提出了影响反应器启动及运行的一些影响因素及相应的控制措施。工程实践证明,UASB与SBR联合工艺在处理饮料生产废水时具有处理效果好、低能耗、易管理等特点。     

橡胶装置污水处理工艺的应用

介绍了"吸附沉淀+载体流化床"为核心的橡胶装置污水处理工艺,运行结果表明,进水水质CODCr≤1 000mg/L,SS≤160 mg/L,出水水质CODCr≤60 mg/L,SS≤20 mg/L,出水达到《污水综合排放标准》一级标准。     

厌氧/生物脱氮/MBR/NF/RO工艺处理渗滤液

采用厌氧/生物脱氮/MBR/NF/RO工艺处理含高浓度难降解有机物的垃圾渗滤液。运行结果表明,该工艺对渗滤液的CODCr、BOD5、NH+4-N、TN的去除率均超过99%,出水CODCr≤60 mg/L,BOD5≤20 mg/L,NH+4-N≤8 mg/L,TN≤20 mg/L,达到《生活垃圾填埋场污染物控制标准》(GB 16889—2008)。     

某高浓度食品加工废水处理工艺设计与运行

采用隔油-气浮-UASB-CASS工艺处理某食品公司巧克力和宠物食品生产过程中排放的高浓度有机废水,在进水CODCr为5 000～10 ooo mg/L,BODs为4 000～8 000 mg/L时,处理出水CODCr≤60 mg/L,BOD5≤20 mg/L.工程实践表明:该处理系统具有处理效果稳定,占地面积小,运行管理简便,运行费用低等优点.     

CASS工艺处理屠宰废水的工程应用

介绍了采用CASS工艺处理屠宰废水的工程实例.其主要构筑物有集水调节池、隔油沉淀池、水解酸化池、缺氧池、CASS池和污泥池.该核工艺是CASS,设计工艺简单、占地面积小,运行费用低、处理效率高.当进水CODCr在1 800～2 200 mg/L时,出水可达到国家<污水综合排放标准>(GB 8978-1996)中的一级标准,主要污染物CODCr≤100 mg/L.     

UASB-CASS工艺处理啤酒废水工程设计

介绍了UASB-CASS工艺处理啤酒废水的工艺设计及运行效果。工程设计规模为3 000 m3/d,经过3个多月的调试运行,出水CODCr≤80 mg/L、BOD5≤20 mg/L、氨氮≤15 mg/L,SS≤70 mg/L,达到《啤酒工业污染物排放标准》(GB 19821—2005)。该工艺处理效果好、运行稳定、费用低、管理方便,具有推广价值。     

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。