碱减量印染废水处理及回用工程北大核心

采用混凝气浮/初沉池/水解酸化/好氧生化/混凝气浮组合工艺处理含碱减量废水的印染废水,工程运行结果表明:进水CODCr≤3 500 mg/L,SS≤500 mg/L,色度≤600倍,处理后出水CODCr≤150 mg/L,SS≤30 mg/L,色度≤40倍;出水再经浸没式超滤(MCR)+反渗透(RO)组合工艺处理,产水水质优于工业水水质,浓水达到绍兴滨海工业园区的纳管标准,实现了污水50%回用的要求。     

碱减量印染废水处理及回用工程

采用混凝气浮/初沉池/水解酸化/好氧生化/混凝气浮组合工艺处理含碱减量废水的印染废水,工程运行结果表明:进水CODCr≤3 500 mg/L,SS≤500 mg/L,色度≤600倍,处理后出水CODCr≤150 mg/L,SS≤30 mg/L,色度≤40倍;出水再经浸没式超滤(MCR)+反渗透(RO)组合工艺处理,产水水质优于工业水水质,浓水达到绍兴滨海工业园区的纳管标准,实现了污水50%回用的要求。     

混凝-A/O法处理废纸造纸废水的工程设计与效果分析

某造纸企业采用混凝-A／O生化工艺处理废纸造纸废水,经过近120天的运行,出水达到DB4426-1989一级排放标准。运行结果表明,物化处理单元对于SS的去除率保持在90％以上,对废水中CODCr的平均去除率基本稳定在50％左右,生化处理单元对SS的去除率保持在50％左右;对CODCr的去除率保持在90％以上;每去除1kgCOD的运行费用约为0．21元。因此,采用物化-A／O生化工艺处理废纸造纸废水具有技术合理性和经济可行性。     

OCC制浆造纸废水封闭循环应用研究

采用物化法及絮凝-生化一体化法处理OCC制浆造纸废水，并对比了几种方法的处理效果和循环使用情况。研究结果表明：絮凝沉淀法和气浮法处理OCC制浆造纸废水，其CODCr、BOD5和SS的去除率分别为63．4％、66．7％、83．8％和66．2％、71．9％、87．8％，且都难以去除可溶性的CODCr。而采用絮凝-生化一体化处理技术，可使废水中的CODCr、BOD5和SS的去除率分别达到76．1％、80．0％、91．1％，尤其对可溶性CODCr的去除率达到20％左右。经一体化技术处理的废水进一步生化处理，可使CODCr降低到50mg／L。     

印染废水回用的连续微滤/反渗透技术

采用连续微滤(CMF)+反渗透(RO)技术对印染废水进行深度处理,研究CMF+RO集成工艺的处理效果。试验结果表明,CMF+RO处理系统运行稳定,对CODCr、色度、浊度、电导率的去除率均达98%以上,RO出水水质优于自来水,各项水质指标均满足印染工艺回用水的要求。     

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。     

MF-RO深度处理印染废水的效果和回用

采用预处理+微滤(MF)+反渗透(RO)双膜技术深度处理印染废水。通过改变废水的温度、pH值、回用率和反渗透操作压力,分析相关因素对CODCr去除率和脱盐效果的影响。试验表明,优化的运行工况为:操作压力1.8 MPa,水温35℃,pH值6.0～10.0,回收率80%;此双膜法深度处理废水对CODCr的去除率和脱盐率分别达到97.4%和97.0%,浊度去除率接近100%,出水水质满足印染工艺回用要求。     

印染废水处理及回用工程实例

采用截留池/水解酸化/好氧生化/混凝沉淀/无阀滤池的组合工艺处理印染水洗废水,工程运行结果表明:进水CODCr≤800 mg/L,SS≤200 mg/L,色度≤200倍,电导率≤3 000μS/cm,处理后出水CODCr≤150 mg/L,SS≤10 mg/L,色度≤15倍,电导率≤3 000μS/cm,系统出水可简单回用于印染前处理(退浆或碱减量)和深色布染色工艺。     

A／O—气浮法处理印染废水

采用A/O（厌氧水解/好氧生化）-气浮工艺处理丝绸印染废水，竣工监测结果表明，CODCr、BOD5、色度、SS、NH3-N等各项指标均能达到国家行业排放标准。     

无碳复写纸涂料废水处理工程设计

以广西某无碳复写纸生产企业为例,对该企业的无碳复写纸涂料废水采用一级物化(高效废水净化器)、生化(塔式生物滤池)和深度氧化(Fenton氧化法)相结合的处理工艺.结果表明,该工艺对无碳复写纸涂料废水的CODCr去除率达97.8％、BOD5去除率达98.3％、SS去除率达95.9％,处理后的废水水质指标均达到了 GB 3...     

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.     

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     

INFOPRINT 2014 was Successfully Held in Dongguan

Sponsored by Printing and Printing Equipment Industries Association of China （PEIAC） and organized by Print China magazine, the Seventeenth Beijing International Printing Information Conference （INFOPRINT 2014） was successfully held on 11th Dec. 2014 at Dongguan Exhibition International Hotel.