高级氧化集成技术深度处理造纸废水工艺研究

本课题介绍一种活性炭吸附+芬顿氧化+臭氧催化氧化的高级氧化集成技术,并将其应用于造纸废水处理。结果表明,最佳处理条件为：活性炭添加量为0.5 g/L,吸附时间30 min,COD_Cr去除率达60%;芬顿氧化工艺处理活性炭吸附出水时,H₂O₂添加量为0.25 g/L,n(Fe²⁺):n(H₂O₂)=1:4、反应时间为1 h,COD_Cr去除率最高可达到32%;臭氧催化氧化处理芬顿氧化出水时,臭氧浓度为10%,H₂O₂加入量为0.1 g/L,气液比为2:1,反应时间为1.0 h,去除效果最佳。该高级氧化集成技术可将废水COD_Cr从180 mg/L降至25 mg/L,去除率为86.1%;达到地表水准Ⅳ类,综合运行成本为8.9元/t。     

生姜调味料酒沉淀分析及控制研究

对生姜调味料酒的沉淀进行分离与分析,结合料酒酒液中的成分变化探究料酒沉淀的原因,并以姜辣素添加量、p H、乙醇体积分数、食盐添加量为试验因素,通过单因素试验和正交试验方法,考察调配工艺对料酒的稳定性的影响,为生姜调味料酒的开发提供参考。研究表明,蛋白质,多酚,多糖和铁是生姜调味料酒沉淀中的主要成分,它们在沉淀中所占比例分别为54.58%,5.45%,15.56%,2.23%;生姜调味料酒的最佳调配工艺为:生姜提取添加量(以姜辣素含量计)为72 mg/L,料酒p H为3.6,调配用黄酒中乙醇体积分数为10%,食用盐添加量10 g/L,此条件下生姜调味料酒储藏6个月后平均透光率达94.4%,有良好的储藏稳定性。     

响应面优化猕猴桃酒混合发酵工艺

探讨一种猕猴桃酒的混合发酵工艺。将酵母RA17与BM4×4混合培养接种至猕猴桃醪液中进行发酵,在单因素的基础上选取混合酒母液添加量、酵母营养剂用量、发酵温度和发酵时间为自变量,采用响应面法研究各因素及两因素交互作用对猕猴桃酒感官评分和总酯含量的影响并建立回归模型,优化得到最佳发酵工艺。结果表明,最佳发酵工艺为混合酒母液添加量16%,酵母营养剂用量0.18 g/L,发酵温度26℃,发酵时间16 d。经过优化后,猕猴桃酒感官评分达到96.20,总酯含量达到6.50 g/L,各项指标均优于优化前猕猴桃酒。     

利用氨基酸工业废水生产饲用产朊假丝酵母

以毛发水解法提取胱氨酸后的废液为氮源,生产饲用产朊假丝酵母。研究选取了12种饲用菌进行耐盐性驯化筛选,并对高耐盐菌株进行培养基及培养条件优化。结果产朊假丝酵母耐盐性最高,其最佳培养条件为：培养时间3 d,装液量50 ml/250 ml三角瓶,初始pH5.5。最优培养基配方为：氨基酸废水330 ml/L,玉米淀粉酶解液110 g/L,K₂>HPO₄ 20 g/L,酵母粉9 g/L,FeSO₄ 2 g/L。在此条件下,菌体得率达4.14%,较优化前提高了128.7%。     

从大豆糖蜜中分离低聚糖的研究

论述了从大豆糖蜜中分离大豆低聚糖的方法。大豆糖蜜经絮凝沉淀分离蛋白后得到大豆粗糖浆,再经脱色、浓缩得到高浓度大豆低聚糖浆。详细研究了MBBG-21A活性炭和YWD12E大孔树脂对大豆粗糖浆的脱色效果。实验表明,活性炭脱色最佳条件为：活性炭添加量1．5％,pH4.0,脱色温度40℃,脱色时间60min;树脂脱色最佳条件为：pH4．0,脱色温度30℃,脱色时间60min。     

碳酸钠对陈化小麦酒精发酵中酒母质量影响的研究

酒母质量是影响整个酒精发酵的关键因素之一,通过采用添加碳酸钠的方法显著提升了陈化小麦培养酒母的质量。结果表明,在陈化小麦摇瓶培养酒母时,不加碳酸钠,酒母培养7h后,死亡率可达到100%;添加碳酸钠可以明显改善酒母质量,且碳酸钠添加浓度为1g/L时,酵母总数以及出芽率均达到最高值,酒母质量达到最好;在50L发酵罐中模拟酒母培养,采用分割法,连续培养5代酒母依然保持较高的质量。     

磷酸活化法脱墨污泥活性炭的改性研究

以Cr（Ⅵ）离子吸附效果为目标,对磷酸活化法制备的脱墨污泥活性炭进行改性。通过改性效果对比,确定了HNO₃改性方法,并对其改性工艺进行了优化。得到最佳改性条件为：10 mol/L的HNO₃作为改性剂、炭酸比1∶15（m∶V）、改性2.0 h。改性后活性炭用于废水吸附以去除Cr（Ⅵ）离子,在改性活性炭用量为5.00 g/L时,Cr（Ⅵ）离子的去除率和吸附量分别达到83.9%和25.17 mg/g,与未改性活性炭相比,吸附量提高了140.3%。改性活性炭的碘吸附值和亚甲基蓝吸附值分别达到543.92 mg/g和103.5 mg/g,碘吸附值提高了28.9%,而亚甲基蓝吸附值略有降低。N2吸附 脱附表明,与未改性活性炭相比,HNO₃改性活性炭比表面积从715.576 m2/g增至1020.161 m2/g,增大了42.6%;总孔容由0.353 cm3/g增长到0.608 cm3/g,提高了72.4%;中孔孔容由0.344 cm3/g增长到0.393 cm3/g,增长了14.2%。结果表明,HNO3改性可大幅提升脱墨污泥活性炭对Cr（Ⅵ）离子吸附性能。     

活性炭-新磷酸钙对玉米芯低聚木糖脱色工艺优化

采用活性炭-新磷酸钙体系对高温蒸煮玉米芯酶法制备的低聚木糖进行脱色工艺研究。经过单因素试验和响应面分析,得出玉米芯低聚木糖脱色最佳工艺条件为:活性炭添加量2.00 g/L、氢氧化钙添加量3.00 g/L,脱色温度49℃,脱色时间31 min,初始pH 4.6。此时,低聚木糖脱色率可达到90.88%,还原糖损失率为5.16%。     

陈府九香料酒的研发

为了增加调味料酒的品种、给消费者提供具有安全性和特殊风味的料酒,首先确认了研发陈府九香料酒调味料的酒基,然后对各种类型黄酒在烹饪中进行试验,确立了陈年加饭酒为最佳的料酒酒基,在此基础上选用多种辛香料,以热酒浸泡提取汁液,再添加食用盐和鲜味剂,经正交试验,结果表明,最佳配比：加饭酒为0.975 kg、食盐为14 g、香辛...     

棉籽壳木聚糖提取液的脱色工艺研究

以伊犁产棉籽壳为原料,比较3种活性炭和3种阴离子交换树脂对棉籽壳木聚糖提取液的脱色效果,确定了最佳脱色条件.结果表明:LY-T-ac型活性炭和D392型阴离子交换树脂对棉籽壳木聚糖液有较好的脱色效果.D392型阴离子交换树脂最佳脱色条件为:脱色温度50℃、pH8.0、脱色时间180 min(150 r/min),在树脂添加量为75 g/L、糖液固形物含量为6％时,脱色率为93.66％.LY-T-ac型活性炭最佳脱色条件为:脱色温度80℃、pH5.0、脱色时间70 min(150 r/min),在活性炭添加量为3g/L、固形物含量为6％时,脱色率为93.51％.     

Textural Properties of Cold-set Gels Induced from Heat-denatured Whey Protein Isolates

A 9% whey protein (WP) isolate solution at pH 7.0 was heat-denatured at 80°C for 30 min. Size-exclusion HPLC showed that native WP formed soluble aggregates after heat-treatment. Additions of CaCl2 (10–40 mM), NaCl (50–400 mM) or glucono-delta-lactone (GDL, 0.4–2.0%, w/v) or hydrolysis by a protease from Bacillus licheniformis caused gelation of the denatured solution at 45°C. Textural parameters, hardness, adhesiveness, and cohesiveness of the gels so formed changed markedly with concentration of added salts or pH by added GDL. Maximum gel hardness occurred at 200 mM NaCl or pH 4.7. Increasing CaCl2 concentration continuously increased gel hardness. Generally, GDL-induced gels were harder than salt-induced gels, and much harder than the protease-induced gel.     

Occurrence of bisphenol-F-diglycidyl ether (BFDGE) in fish canned in oil

The levels of bisphenol-F-diglycidyl ether (BFDGE) were quantified as part of a European survey on the migration of residues of epoxy resins into oil from canned fish. The contents of BFDGE in cans, lids and fish collected from all 15 Member States of the European Union and Switzerland were analysed in 382 samples. Cans and lids were separately extracted with acetonitrile. The extraction from fish was carried out with hexane followed by re-extraction with acetonitrile. The analysis was performed by reverse phase HPL C with fluorescence detection. BFDGE could be detected in 12% of the fish, 24% of the cans and 18% of the lids. Only 3% of the fish contained BFDGE in concentrations considerably above 1mg/kg. In addition to the presented data, a comparison was made with the levels of BADGE (bisphenol-A-diglycidyl ether)analysed in the same products in the context of a previous study.     

Review of techniques to manufacture micro-hydrogel particles for the food industry and their applications

Microgels are ‘soft’ microscopic cross-linked polymeric particles that are being increasingly exploited in a variety of industries for rheology control, encapsulation and targeted delivery. They are valued because of the ability to tune their functionality to address specific applications in oil recovery, coatings, drug delivery, cosmetics, personal care and foods. Food microgels are typically biopolymer hydrogels in the form of microspheres, nanospheres (also called nanogels), spheroids and fibres. The utilisation of engineered microgels in foods has so far been limited, despite their great potential to address several needs in the food industry, including: satiety control, encapsulation of phytonutrients and prebiotics, texture control for healthier food formulations (e.g. reduced fat products), and targeting delivery to specific areas in the digestive tract. We review the scientific and patent literature on the utilisation and manufacturing methods for producing microgels with an emphasis on micro-hydrogels for food applications.     

12—A CRITIQUE OF SOME HYPOTHESES RELATING TO THE HETEROGENEITY OF THE HIGH-SULPHUR PROTEINS OF WOOL

Joubert and Burns prepared a large number of fractions from the high-sulphur proteins of wool and estimated their molecular weights and amino-acid compositions. Their data have been re-examined in order to look for statistically significant interrelations between amino acids and between the proportion of various amino acids and molecular weight. Statistical analysis of the data is also used to examine the credibility of some hypotheses concerning the mechanism of keratin biosynthesis and to provide further evidence for the existence of families of proteins within the high-sulphur fractions of wool.     

Contribution of European research to risk analysis

The European Commission's, Quality of Life Research Programme, Key Action 1—Health, Food & Nutrition is mission-oriented and aims, amongst other things, at providing a healthy, safe and high-quality food supply leading to reinforced consumer confidence in the safety of European food. Its objectives also include the enhancing of the competitiveness of the European food supply. Key Action 1 is currently supporting a number of different types of European collaborative projects in the area of risk analysis. The objectives of these projects range from the development and validation of prevention strategies including the reduction of consumers risks; development and validation of new modelling approaches; harmonization of risk assessment principles, methodologies, and terminology; standardization of methods and systems used for the safety evaluation of transgenic food; providing of tools for the evaluation of human viral contamination of shellfish and quality control; new methodologies for assessing the potential of unintended effects of genetically modified (genetically modified) foods; development of a risk assessment model for Cryptosporidium parvum related to the food and water industries; to the development of a communication platform for genetically modified organism, producers, retailers, regulatory authorities and consumer groups to improve safety assessment procedures, risk management strategies and risk communication; development and validation of new methods for safety testing of transgenic food; evaluation of the safety and efficacy of iron supplementation in pregnant women; evaluation of the potential cancer-preventing activity of pro- and pre-biotic ('synbiotic') combinations in human volunteers. An overview of these projects is presented here.     

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 Latest Data about Development of Chinese Printing Industry in 2013

In the 2014 China（Shanghai）International Printing Week,Director Wang Yanbin released the latest data about development of Chinese printing industry in 2013.According to statistics,in 2013,the total output value of Chinese printing industry exceeded 1trillion Yuan for the first time,reaching 1.03985 trillion Yuan.There were 105,000 printing enterprises in China,employees were 3.415 million.The total asset was 1.06247 trillion Yuan;     

The State Council Issued "Directory of Government Approved Investment Projects(2013 Edition)"

正On December 2nd,2013,the State Council issued the notification of"Directory of Government Approved Investment Projects(2013 Edition)"(hereafter referred to as"notification").It is pointed out in the"notification"that in order to further deepen reforms in investment systems and administrative examination and approval systems,simplify administrative procedures and delegate powers to lower levels,earnestly     

China textile machinery: taking off in progress

正Among the 1600 exhibitors who take apart in the ITMA ASIA+CITME2014 2/3 are Chinese manufactures.If the numerous figures failed to attract your attention,the increase of quality should draw your focus.To adopt the demand of developing textile machine market,domestic textile machinery enterprises now follow the slogan of"technology drives development"to enhance product competitiveness.Our domestic sellers will showcase product ranging from spinning,weaving,dyeing and printing,     

Top Ten News of China's Paper Industry 2013

On December 24th, 2013, the meeting on the selection of top 10 news of China＇s paper industry 2013 sponsored by 〈China Paper Newsletters〉 was held in Beijing. The yearly selection of the top l0 news, which began in 2000, has become a brand activity widely recognized in the industry thanks to the support from the authorities at all levels and public participation.