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1.
曲阜三孔啤酒厂废水处理站设计   总被引:1,自引:1,他引:1  
曲阜三孔啤酒厂废水处理高浓度和低浓度有机废水处理规模分别为500m^3/d和3500m^3/d。进水COD分别为5000mg/L和500mg/L。本工艺采用UASB-生物接触氧化-共聚气浮为体处理工艺,高浓度废水先行UASB厌氧处理,处理后的消化液与低浓度水混合好氧处理,出水达到GB8978-88一级”新、扩、改”标准,为啤行业废水综合治理和利用提供了一条件较好的工艺。  相似文献   

2.
接种颗粒污泥UASB反应器处理味精-卡那霉素混合废水   总被引:6,自引:1,他引:5  
采用屠宰废水中培养的颗粒污泥接种启动中温(35±1)℃ UASB反应器处理味精-卡那霉素混合废水,反应器能随较高浓度的硫酸盐,氨氮和的氯化物。当HRT为2-3h,容积负荷率可达35-40kg COD/(m^3.d),COD去除率为75%-80%,进水COD/SO^2-4可低至4-5。  相似文献   

3.
酿酒工业废水环保治污新途径--三段"SS"去除法   总被引:2,自引:0,他引:2  
论述了三段“SS”去除法的工作原理及其在处理酿酒废水中应用的工程实例。酒厂高浓度有机废水经过固液分离-厌氧消化(复合厌氧反应器)-物化处理,三段逐级去除废水中的“SS”,每段均具有突出的“SS”去除能力,同时COD去除率高。通过工程实例证明,三段“SS”去除法不仅能使废水达到国家要求的排放标准,而且可以省去传统工艺中耗能较高的好氧处理环节,从而降低了工程投资,减少了运行费用。  相似文献   

4.
几种新型厌氧反应器在废水处理中的运用   总被引:1,自引:0,他引:1  
简要介绍了厌氧法处理废水的反应机理及3种厌氧反应器。并介绍了日本新近开发的UASB改进型上流回转式反应器及其实际应用情况。  相似文献   

5.
无机膜-生物反应器处理啤酒废水及其膜清洗的试验研究   总被引:34,自引:5,他引:29  
无机膜-生物反应器(IMBR)是90年代兴起的一种废水生化处理的新技术。笔者介绍了无机膜-生物反应器用于啤酒废水的处理研究。采用好氧分置式膜生物反应器,膜组件是无机陶瓷膜,生物反应是活性污泥曝气池。  相似文献   

6.
生物膜法处理2,3-二甲基苯胺废水试验研究   总被引:2,自引:0,他引:2  
采用缺氧折流板生物膜和循环移动载体生物膜反应器处理2,3-二甲基苯胺废水,结果表明,缺氧折流板反应器具有厌氧滤池和厌氧折流板反应器的优点,当水力停留时间为10.5h(缺氧5.5h,好氧5h)时,系统去除率可达89.7%。  相似文献   

7.
通过比较CSRT(连续搅拌式)好氧反应器和新型固定-流化复合厌氧反应器研究了偶氮染料废水处理的效果和特点。研究中采用固定-流化复合厌氧水解+好氧生物工艺对偶氮染料废水进行处理,并取各对照水样做光谱分析,试验者还对新型复合厌氧反应器运行的影响因素进行了研究。研究结果表明,偶氮染料废水直接好氧处理,去除率只有5%左右,直接厌氧水解处理,染料平均降解率60%。水解出水经好氧降解,染料还能降解65%~70%;新型固定-流化复合厌氧反应器达到其设计目标,满足厌氧水解工艺发展的要求,有较好的实用价值。  相似文献   

8.
柠檬酸废水的治理技术及工艺   总被引:7,自引:1,他引:6  
采用上流式厌氧污泥床(简称UASB)技术处理柠檬酸废水,然后再经好氧生化处理,使废水达到排放标准  相似文献   

9.
微电解-厌氧水解酸化-SBR串联工艺处理制药废水试验研究   总被引:31,自引:3,他引:28  
采用微电解-厌氧水解酸化-序批式活性污泥法(SBR)串联工艺处理化学合成制药废水,试验分别考察了pH、温度、停留时间以及污泥负荷对整个工艺处理效果的影响。结果表明,原废水BOD/CODr约为0.13,属难生物降解废水,经微电解-厌氧水解酸化处理后,出水BOD/CODCr,可达0.63,可生化性大大提高。维持SBR进水CODCr在1500mg/L左右,污泥负荷为0.5kgCODCr/(kgMLSS.  相似文献   

10.
苎麻脱胶废水处理工艺的试验研究   总被引:8,自引:0,他引:8  
本文针对苎麻脱胶废水的特点,进行了厌氧-好氧方法处理该废水的试验研究。结果表明:在常温下,当Nv为3.33kgCOD/m^3.d,进行COD为10000ml/L,HRT为72h,厌氧流化床COD去除率为50%左右。其出水稀释至100mg/L左右,在0.34kgCod/kgVSS.d负荷下,经6-8h好氧处理即可达到国家排放标准。  相似文献   

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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.  相似文献   

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14.
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.  相似文献   

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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.  相似文献   

18.
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.  相似文献   

19.
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.  相似文献   

20.
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。  相似文献   

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