制浆造纸综合废水深度处理中型实验

利用"磁处理+催化聚合+絮凝沉淀"组合技术处理废纸造纸综合废水。处理规模为600m3/d的中型实验结果表明,在进水CODCr150mg/L、色度50倍左右时,出水可稳定在CODCr60mg/L、色度7倍以内;系统对CODCr色度的去除率分别为60%和85%;水处理药剂费用为1.25元/m3。     

染纱废水处理及膜回用工程实例

采用"初沉池+接触氧化+好氧生化+超滤+反渗透+混凝气浮"的组合工艺处理染纱废水,工程实际运行结果显示:进水CODCr≤800 mg/L,SS≤200 mg/L,色度≤400倍,电导率≤3 000μS/cm,外排出水(RO浓水)CODCr≤180 mg/L,SS≤80 mg/L,色度≤60倍,膜清水CODCr≤15 mg/L,色度≤2.0倍,电导率≤200μS/cm,达到当地环保间接排放要求,且膜处理回用率可达到70%以上。     

碱法木浆制浆造纸综合废水深度处理试验

利用"磁整理-梯级反应混凝-生物炭处理"组合技术深度处理碱法木浆制浆造纸综合废水。处理规模为1000m3/d的中型试验结果表明,在进水CODCr为300mg/L、色度200倍的条件下,出水CODCr可达60mg/L、色度为10倍;该系统对CODCr及色度的去除率分别为80%和95%。     

铁碳床联合过氧化氢氧化-混凝技术深度处理制浆废水

采用铁碳床联合过氧化氢氧化-混凝技术对制浆造纸生化处理后的出水进行深度处理,考察了pH值、反应时间、H2O2投加量和进水水质等不同操作条件下对CODCr和色度去除的影响.结果表明,在pH值为5、反应时间为120 min、H2O2投加量为100 mg/L的条件下对污染物去除效果最佳,进水CODCr浓度对CODCr和色度去除影响不大.进水CODCr为520 mg/L、色度为400倍情况下,出水CODCr低于100 mg/L,色度低于50倍,出水各项指标均达到《制浆造纸工业水污染物排放标准》 (GB3544-2008).     

印染废水的悬浮生物滤池/混凝沉淀处理中试

采用中试规模(4 m3/d)悬浮生物滤池A/O/混凝沉淀/O组合工艺处理棉印染废水,考察了不同停留时间(HRT)条件下,该工艺对CODCr和色度的去除效果.试验结果表明,进水CODCr1 000～1 600 mg/L、色度300～700倍、pH值12～14时,经该组合工艺处理后,相应的出水指标为CODCr 70～90 mg/L、色度＜20倍、pH值6～8,完全符合印染废水国家一级排放标准.     

混凝协同好氧生物膜技术深度处理造纸废水的实验研究

采用混凝沉淀协同好氧生物膜技术深度处理造纸废水,分别考察了PAM、FeCl3、Al2(SO4)3这3种不同种类的混凝剂对CODCr和色度去除率的影响,并特别研究了PAM投加量对反应过程的影响规律。结果表明:以FeCl3为混凝剂的协同好氧生物膜技术效果最为显著,色度去除率最高为69.30%,与单独使用FeCl3为混凝剂的混凝沉淀相比,CODCr去除率提高了73.72%;当PAM投加量分别为1.5mg/L、3.0mg/L、4.5mg/L、6.0mg/L时,以3.0mg/L时效果最佳,CODCr和色度去除率分别达到63.18%和47.64%。     

碱法禾草制浆造纸中段废水深度处理的实验研究

利用"化学催化氧化-生物接触氧化"组合技术对制浆造纸中段废水进行深度处理。结果表明,在进水CODCr平均为325 mg/L、色度平均为280倍的条件下,出水CODCr可达59.5 mg/L、色度47倍,低于国家排放标准。该系统具有流程简单、处理效率高、运行稳定可靠等优点。     

废纸制浆造纸废水深度处理中型试验

采用"磁化+两级反应沉淀"工艺深度处理废纸制浆造纸废水,处理规模为600m3/d的中型试验结果表明,该处理系统在进水CODCr92～131mg/L、色度55～65倍、电导率2387～2527μS/cm、总硬度314～347mg/L的情况下,出水水质稳定,出水CODCr44～57mg/L、色度在5～10倍、电导率1428～1514μS/cm、总硬度122～138mg/L,出水水质满足《制浆造纸工业水污染物排放标准》(GB3544-2008)中"水污染物特别排放限值"要求。同时,废水中有机污染物及电导率、总硬度高效去除,可有效拓展废水的回用途径。     

铁泥基催化剂非均相Fenton深度处理造纸废水

以Fenton氧化处理造纸废水产生的污泥为原料,复配粉煤灰、煤泥、羧甲基纤维素钠,采用高温热解的方法制备铁泥基催化剂。以废纸造纸二沉池出水为目标污染物,并以CODCr去除率和色度去除率作为评价指标,研究了非均相Fenton深度处理过程中铁泥基催化剂对废水的处理效果。结果表明,铁泥基催化剂的比表面积为230 m~2/g;当反应体系初始pH值为2.5、催化剂投加量15 g/L、m(CODCr)∶m(H₂O₂)=1∶1.5、反应时间100 min时,CODCr去除率为66.7%,色度去除率高于80%,污泥产量比均相Fenton降低了91%～94%。     

碱减量印染废水处理工程实例

采用厌氧水解/好氧生化/混凝沉淀法的组合工艺处理碱减量印染废水,工程运行结果表明:进水CODCr为2 263 mg/L,SS(悬浮物)为183 mg/L,色度为683倍时,处理后出水CODCr为166 mg/L,SS为7 mg/L,色度为76倍,可达到GB4287—2012《染织纺整工业水污染物排放标准》的现有企业间接排放标准要求。     

Reliable identification of grapevine rootstock varieties using RAPD PCR on woody samples

Since grapevine ( Vitis spp .) rootstock material is being traded increasingly as disbudded woody material a lack of distinctive morphological features on such material necessitates an alternative and reliable means of identification. Methods described here were developed for rapid and efficient extraction of DNA from woody samples rich in phenolic compounds and polysaccharides, and for subsequent identification of varieties by RAPD PCR. Using these methods, and with the application of only one selected RAPD primer, we were able to differentiate sixteen rootstock varieties, including the seven varieties most commonly used in Germany. Problems commonly encountered with reproducibility of RAPD patterns were avoided by choosing primers with a dinucleotide sequence and a high G/C content that allowed a rather high annealing temperature of 45°C. Methods described here should also be useful for other horticultural crops, especially those with woody tissues rich in phenolic compounds and polysaccharides.     

An internet compendium of analytical methods and spectroscopic information for monomers and additives used in food packaging plastics

An internet website (http://cpf.jrc.it/smt/) has been produced as a means of dissemination of methods of analysis and supporting spectroscopic information on monomers and additives used for food contact materials (principally packaging). The site which is aimed primarily at assisting food control laboratories in the European Union contains analytical information on monomers, starting substances and additives used in the manufacture of plastics materials. A searchable index is provided giving PM and CAS numbers for each of 255 substances. For each substance a data sheet gives regulatory information, chemical structures, physico-chemical information and background information on the use of the substance in particular plastics, and the food packaging applications. For monomers and starting substances (155 compounds) the infra-red and mass spectra are provided, and for additives (100 compounds); additionally proton NMR are available for about 50% of the entries. Where analytical methods have been developed for determining these substances as residual amounts in plastics or as trace amounts in food simulants these methods are also on the website. All information is provided in portable document file (PDF) format which means that high quality copies can be readily printed, using freely available Adobe Acrobat Reader software. The website will in future be maintained and up-dated by the European Commission's Joint Research Centre (JRC) as new substances are authorized for use by the European Commission (DG-ENTR formerly DGIII). Where analytical laboratories (food control or other) require reference substances these can be obtained free-ofcharge from a reference collection housed at the JRC and maintained in conjunction with this website compendium.     

Aroma characterization of various apricot varieties using headspace–solid phase microextraction combined with gas chromatography–mass spectrometry and gas chromatography–olfactometry

The characterization of the aromatic profile of several apricot cultivars with molecular tracers in order to obtain objective data concerning the aromatic quality of this fruit was undertaken using headspace–solid phase microextraction (HS–SPME). Six apricot cultivars were selected according to their organoleptic characteristics: Iranien, Orangered, Goldrich, Hargrand, Rouge du Roussillon and A4025. The aromatic intensity of these varieties measured by HS–SPME–Olfactometry were defined and classified according to the presence and the intensity of grassy, fruity and apricot like notes. In the six varieties, 23 common volatile compounds were identified by HS–SPME–GC–MS. Finally, 10 compounds, ethyl acetate, hexyl acetate, limonene, β-cyclocitral, γ-decalactone, 6-methyl-5-hepten-2-one, linalool, β-ionone, menthone and (E)-hexen-2-al were recognized by HS–SPME–GC–O as responsible of the aromatic notes involved in apricot aroma and considered as molecular tracers of apricot aromatic quality which could be utilized to discriminate apricot varieties.     

Tests of potential functional barriers for laminated multilayer food packages. Part I: Low molecular weight permeants

The advent of the functional barrier concept in food packaging has brought with it a requirement for fast tests of permeation through potential barrier materials. In such tests it would be convenient for both foodstuffs and materials below the functional barrier (sub-barrier materials) to be represented by standard simulants. By means of inverse gas chromatography, liquid paraffin spiked with appropriate permeants was considered as a potential simulant of sub-barrier materials based on polypropylene (PP) or similar polyolefins. Experiments were performed to characterize the kinetics of the permeation of low molecular weight model permeants (octene, toluene and isopropanol) from liquid paraffin, through a surrogate potential functional barrier (25 μm-thick oriented PP) into the food simulants olive oil and 3% (w/v) acetic acid. These permeation results were interpreted in terms of three permeation kinetic models regarding the solubility of a particular model permeant in the post-barrier medium (i.e. the food simulant). The results obtained justify the development and evaluation of liquid sub-barrier simulants that would allow flexible yet rigorous testing of new laminated multilayer packaging materials.     

Analysis of benzo[a]pyrene in spiked fatty foods by second derivative synchronous spectrofluorimetry after microwave-assisted treatment of samples

A simple, rapid and inexpensive method has been developed for the determination of benzo[a     

The development of reference materials for paralytic shellfish poisoning toxins in lyophilized mussel. II: Certification study

This paper describes the second part of a project undertaken to develop certified mussel reference materials for paralytic shellfish poisoning toxins. In the first part two interlaboratory studies were undertaken to investigate the performance of the analytical methodology for several PSP toxins, in particular saxitoxin and decarbamoyl-saxitoxin in lyophilized mussels, and to set criteria for the acceptance of results to be applied during the certification exercise. Fifteen laboratories participated in this certification study and were asked to measure saxitoxin and decarbamoyl-saxitoxin in rehydrated lyophilized mussel material and in a saxitoxin-enriched mussel material. The participants were allowed to use a method of their choice but with an extraction procedure to be strictly followed. The study included extra experiments to verify the detection limits for both saxitoxin and decarbamoyl-saxitoxin. Most participants (13 of 15) were able to meet all the criteria set for the certification study. Results for saxitoxin.2HCl yielded a certified mass fraction of <0.07 mg/kg in the rehydrated lyophilized mussels. Results obtained for decarbamoyl-saxitoxin.2HCl yielded a certified mass fraction of 1.59+/-0.20 mg/kg. The results for saxitoxin.2HCl in enriched blank mussel yielded a certified mass fraction of 0.48 +/- 0.06 mg/kg. These certified reference materials for paralytic shellfish poisoning toxins in lyophilized mussel material are the first available for laboratories to test their method for accuracy and performance.     

Announcing a new international peer-reviewed journal:Food Science and Human Wellness now accepting manuscript submission in English

<正>We are pleased to announce the launch of a new international peer-reviewed journal-Food Science and Human Wellness,ISSN 2213-4530,which is an open access journal,produced and hosted by Elsevier B.V.on behalf of Beijing Academy of Food Sciences.Food Science and Human Wellness is an international peer-reviewed English journal that provides a forum for the dissemination of the     

Chinese CTP Market

According to Printing and Printing Equipment Industries Association of China（PEIAC）＇s statistics to the plate manufucturer in China, in 2013, the actual offset plate production has reached 346 million square meters in China. Among them, the CTP production volume was 245 million square meters, up by 11% than that of last year; the total sales of the CTP plate was 239 million square meters, up by 13%.     

Preparatory Work of Print China 2015 is Going Smoothly

正Held at Guangdong Modern International Exhibition Center,Print China 2015 will cover 7exhibition halls,besides the original Hall No.3,4,5,6,7,the newly built F zone of Hall 3 will be used too.The total area will be140,000 square meters.Hall 3:Offset and large printing equipment,package printing equipment,post press