制浆中段废水污染特征及脱色处理方法

研究了木浆和竹浆中段废水的污染特征以及脱色方法.研究结果表明,制浆中段废水的生化性差,其分子质量较大的有机物是废水色度的主要来源,并且随着废水pH值的升高其色度也加深,混凝法是简单有效的脱色处理方法.     

制浆中段废水混凝脱色

采用常规混凝剂对木浆(A厂)和竹浆(B厂)生化处理前后的中段废水进行了混凝脱色处理。研究表明,PAC和PAM可以降低制浆中段废水的色度和CODCr;B厂竹浆中段废水的混凝脱色处理效果优于A厂木浆中段废水,但B厂CODCr去除效果不如A厂好;生化处理后A厂中段废水的混凝脱色率优于生化处理前,B厂中段废水经生化处理和混凝后,色度由431 C.U.降至220 C.U.。     

化学机械法制浆中段废水中有机污染物的降解

采用水解酸化-接触氧化法处理广西某制浆厂化学机械法制浆中段废水,出水CODCr,为352 mg/L,SS为84 mg/L.运用GCMS联用仪对制浆中段废水中的有机物进行测定,共测得有机污染物41种,其中10种有机污染物被列入美国EPA环境优先控制污染物,在进水的30种有机物中,15种有机物被完全去除.通过分析制浆中段废水有机污染物在工艺流程中相对组分变化的规律,揭示了水解酸化-接触氧化法处理制浆中段废水过程中的污染物迁移和降解规律.     

加压曝气生物法处理制浆中段废水

本文研究了加压曝气生物法处理制浆中段废水，结果表明，制浆中段废水常规活性污泥法处理的活性污泥能很好地适应加压曝气生化系统；加压曝气法处理制浆中段废水，可大大提高系统的生化反应效率，缩短处理时间，提高CODcr去除率，对CODcr负荷较高的制浆中段废水采用加压曝气生物法进行单段处理，可以达到国家排放标准。     

物化-生化法处理制浆生化混合废水的工程应用

在物化-生化法处理制浆中段废水的工程调试中，由于制浆中段废水可生化性差，COD的去除效果不是很理想，利用生化厂有机物含量高的酵母废水引入系统中与制浆中段废水混合一起处理，提高了废水的可生化性，缩短了活性污泥的驯化时间，增加了污泥的活性，提高了污水处理效果。     

制浆造纸废水生物活性炭深度处理的研究

对生物活性炭法深度处理制浆造纸废水进行研究,选用培养驯化好的白腐菌和特殊菌群作为深度处理的微生物。试验结果表明,生物活性炭在深度处理制浆造纸废水中的效果明显,对难生化的有机污染物去除率高。     

强化电化学处理造纸中段废水提高可生化性的研究

电化学方法处理难降解有机废水是一种很有前途的技术，对难于生物降解有毒污染物的去除非常有效，是目前水处理研究中一个较为活跃的领域。本文设计了一个利用电化学方法处理造纸中段废水的简易实验方案，通过多组数据控制参数由实验结果找出最佳运行参数，整理并分析实验数据，由实验结果得出电化学处理废水可以在很大程度上提高废水可生化性的结论。当电解时间为80min，电流为1．6A时，制浆造纸中段水的BOD，／COD达到最大值0．53，生化性最好。     

Fe~0-H_2O_2体系深度处理制浆中段废水的研究

制浆中段废水采用生化处理后往往不能达标排放,需要深度处理。本文研究Fe0-H2O2体系深度处理制浆中段废水的影响因素,以期为制浆中段废水的深度处理提供一种经济有效的工艺。研究了反应的初始pH值,铁粉加入量,双氧水的加入量以及反应时间对Fe0-H2O2体系深度处理制浆中段废水的影响,结果表明,初始pH为3,铁粉加入量为1.5g/L,双氧水加入量为0.32mL/L,反应时间为40min时,CODCr去除率可达79.21%。     

麦草浆制浆造纸废水难降解有机物成分鉴定

麦草浆制浆造纸废水可生化性差,采用混凝-加核絮凝组合工艺处理后,出水COD_Cr仍偏高,而COD_Cr残留问题一直是困扰制浆造纸企业水处理的难点。为探究其成因,采用气相色谱与质谱联用（GC-MS）全扫描有机物定性分析方法对处理前后的废水进行了分析。结果表明,处理后废水COD_Cr偏高主要是由留在水中未被成功去除的小分子有机物所致,如邻苯二甲酸二异丁酯和邻苯二甲酸单乙基己酯等;通过测定处理前后废水UV254,间接反映出混凝-加核絮凝组合工艺对麦草浆制浆造纸废水中难降解大分子芳烃类有机污染物有较好的去除效果,同时提高了其可生化性。     

印染污水的特点

印染污水的主要特点如下:a.色度大、有机物含量高、毒性大,印染污水总体上是含有有机物的废水,污染物主要是残留在水中的天然有机物质以及人工合成的有机物质,它们使水质变差,水的颜色加深并且颜色各不相同;b.印染废水是生产过程中各种废水的综合,不同企业生产排放的水不但有生产废水还有生活污水,这些水的水质经常变化,综合水质COD值较高,水的可生化性差;     

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.     

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.     

National Development and Reform Commission Issued Announcement for Selection of Major Preliminary Research Projects for the "13~(th) Five-Year Plan"

In Apri Commi major p Plan＂ （h 2014, the National Development and Reform ssion issued an announcement for selection of reliminary research projects for the ＂13th Five-Year ereafter referred to as ＂The Announcement＂）     

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 scientific     

Contamination of animal feed and food from animal origin with mineral oil hydrocarbons

Oils and fats used for the production of animal feed can become contaminated with mineral oil material originating from gas oils (C₁₈-C₃₅) or synthetic oils (poly alpha olefins, C₂₅ to beyond C₄₅). An important cause is assumed to be the discharge of waste oils, such as motor oil and hydraulic oils. Mineral oil material was analysed by on-line LC-GC-FID directly in the fat or in a raw extract from animal feed or foodstuffs. In Switzerland in summer/autumn 1999 concentrations in oils and fats for feed production were often found to be between 100 and 1000mg/kg. In the feeds, the average concentration was around 100mg/kg with values ranging up to a maximum of 1000mg/kg; few samples were free of contamination. In animal body fat, the average concentration determined in summer 1999 was 25mg/kg, with a maximum of 150mg/kg, although in samples from December 1999, contamination was substantially lower. In the fat phase of eggs, the average concentration was 30mg/kg, with a maximum of 80mg/kg. Paraffin oil is used for feed production, which may account for part of the contamination problem (e.g. eggs).