造纸过程中腐浆的形成及控制

总结了造纸过程中腐浆产生的原因、危害以及控制方法等,介绍了采取高效、广谱、低毒的杀菌剂药物等控制手段来控制腐浆的形成,展望了造纸过程中腐浆控制的新方向。     

造纸生产过程中腐浆的控制

本文介绍了造纸生产过程中腐浆产生的主要原因及危害，提出通过水源的净化处理与强化纸机系统的清洗等生产防治措施以及添加腐浆控制剂的方法来控制腐浆，并指出由于生产防治措施不能彻底解决造纸生产中的微生物问题，须同时根据实际情况，选择高效、广谱、低毒的杀菌防腐剂和其它腐浆控制剂对其进行药物防治。     

废纸回用时发生腐浆问题的来龙去脉

废纸回用时发生沉积物问题有两个方面,一个方面是胶粘沉积物问题,另一个方面是腐浆沉积物问题.本文在后一个方面着重介绍了废纸回用时的微生物问题,腐浆形成及其机理与组成,以及腐浆控制的各种方法,最后提出了对研究工作的建议.     

讲座：废纸回用时发生腐浆问题的来龙去脉

废纸回用时发生沉积物问题有两个方面，一个方面是胶粘沉积物问题，另一个方面是腐浆沉积物问题。本文在后一个方面着重介绍了废纸回用时的微生物问题，腐浆形成及其机理与组成，以及腐浆控制的各种方法，最后提出了对研究工作的建议。     

腐浆障碍的防治

本文介绍了广州造纸厂在新闻纸生产系统中,防治腐浆障碍的情况,通过调查腐浆的原因,与采取以防为主,防治结合的治理腐浆措施,较好地处理腐障碍问题。     

与锰过氧化物酶相关的硫酸盐浆的生物漂白

介绍了白腐菌在KP浆生物漂白中起作用的木质素降解体系。概述了锰过氧化物酶(MnP)的性质及其催化反应。并通过实例介绍了产MnP的白腐菌及其所产MnP对KP浆的漂白效果及其在生物漂白体系中的影响因素。     

用超水控制腐浆

介绍超水控制腐浆的原理及优点,并针对超水控制腐浆和优化白水循环的效果进行了试验。结果表明,在白水系统中添加超水可以起到很好的控制腐浆及杀菌效果．并可以改善白水封闭循环中产生的一系列问题．达到提高产量节约成本的目的。     

腐浆障碍的防治

本文介绍了广州造纸有限公司在新闻纸生产系统中 ,防治腐浆障碍的情况 ,通过调查腐浆的成因 ,采取以防为主、防治结合的治理腐浆措施 ,较好地解决了腐浆障碍问题     

腐浆障碍的防治

本文介绍广州造纸厂在新闻纸生产系统中,防治腐浆障碍的情况,通过调查腐浆的成因,与采取以防为主、防治结合的治理腐浆措施,较好地处理腐浆障碍问题。     

白腐菌预处理制蔗渣生物机械浆

近年来,我国虽有逐步增多木浆生产的趋势,但是草浆仍占有很大的市场,对草类的机械法制浆、化学法制浆和化学机械法制浆等都有比较深入的研究。随着生物技术的发展和人们对生物技术在制浆造纸过程中应用的认识,使得研究生物技术在草类制交中应用的课题越来越受到人们的关注。前不久,美国两所高校的研究者以蔗渣为原料,分别用白腐菌Ceriporiopsis subvermispora(Cs)和Pleurotus ostreatus(Po)进行预处理,多面手用机械法磨浆,制得得率很高、强度较好的生物机械 浆。本文介绍白腐菌预处理制蔗渣生物机构浆的试验方法和结果。     

好氧生物膜法处理工业微污染水的研究

针对化工微污染废水中的有机污染物,采用好氧生物膜法进行处理,研究好氧生物膜法对处理微污染工业废水的去除效果。     

废纸回用时发生腐浆问题的来龙去脉(续)

4腐浆控制方法 造纸工业微生物问题的控制已经过一段时间的发展,在不知道这个问题的性质和根源以前,控制方法是基于独有的应用杀菌剂的方法.但是,在进一步研究了微生物问题以后,开发了新的专门的控制策略,这个趋向受到了技术方面和对应用杀菌剂的限制方面的强化.     

Ropy slime formation in vacuum-packed cooked meat products caused by homofermentative lactobacilli and a Leuconostoc species

This paper deals with the cause of the formation of ropy slime on the surface of vacuum-packed cooked meat products. Two different homofermentative lactobacilli and a Leuconostoc strain were isolated from different ropy vacuum-packed meat products. The strains were able to produce slime experimentally on vacuum-packed cooked sausages. The slime had a molecular weight in the range of 70000-30000 and contained glucose and galactose in a ratio 10:1-10:2. The formation of ropy slime also occurred on sausages without added sugars.     

新闻纸生产中湿部化学品的协同与优化

结合企业实际，就湿部淀粉添加、助留助滤应用、微生物控制、树脂障碍控制等几个方面介绍了有关体会。并总结出：新闻纸生产过程中湿部化学品的添加需全面考虑，兼顾化学品之间的协同关系的同时，避免相互之间的制约，从而获得最优化的效果。     

B-cell mitogenic activity of slime products produced from slime-forming, encapsulated Lactococcus lactis ssp. cremoris.

The mitogenic activities of whole cell lyophylized preparations, cell-wall components, and slime products obtained from Lactococcus lactis ssp. cremoris KVS20 were examined on murine spleen cells. Whole cell lyophylized preparations and slime products significantly (P < .05) stimulated mitogenic responses of the cells. The highest activity was induced by slime products in which the optimal concentration was 116 microg/ml. The significant (P < .05) increase of mitogenic activity induced by slime products occurred at 24 h, and the peak response was obtained 48 h after the stimulation. The activity was much higher in the fraction enriched with B cells than in the fraction enriched with T cells. In addition, slime products induced mitogenic activity to spleen cells of athymic nu/nu mice. The chemical analysis of lipopolysaccharide and the minimal concentration for mitogenic response eliminated the possibility that the activity of slime products may be due to the contamination of lipopolysaccharide. The data demonstrate that slime products are a potent B-cell-dependent mitogen.     

正一价氯胺使大型纸机杀菌防腐剂效果实现质的飞跃

一种新型号的杀菌防腐剂代替过去普通型号的杀菌防腐剂,提高杀菌防腐效果,已是许多生产杀菌防腐剂厂家多年的执着追求.如今正一价氯胺的出现给杀菌防腐剂带来了划时代的飞跃,创造了杀菌防腐效果的新历史,并且成本低廉,几乎所有中、碱性造纸的大型纸机都已经或正在寻求这种新型号的杀菌防腐剂代替过去普通型号的杀菌防腐剂.     

流化床生物膜反应器用于酵母菌体培养

研究了流化床生物膜反应器用于酵母菌体培养的结果，发现在气升式反应器中加入载体，形成流化床生物膜反应器，可以进一步提高反应器的传氧速率、间歇培养的菌体浓度和连续培养的生产强度。     

Effect of High-Pressure Food Processing on the Physical Properties of Synthetic and Biopolymer Films

ABSTRACT:  The effect of high-pressure processing on 2 plastic food packaging films, a biopolymer (PLASiOx/PLA) and a synthetic polymer (PET-AlOx), was studied. Samples in direct contact with olive oil, as a fatty food simulant, and distilled water, as an aqueous simulant, were subjected to a pressure of 500MPa for 15 min at 50 °C. The mechanical, thermal, and gas barrier properties of both films were evaluated after the high-pressure processing (HPP) and compared to control samples that have not undergone this treatment. Significant changes in all properties were observed in both films after the HPP treatment and in contact with the food simulants. In both films an induced crystallization was noticed. In the PLASiOx/PLA film the changes were larger when in contact with water that probably acted as a plasticizer. In the PET-AlOx film the changes in properties were attributed to the formation of pinholes and cracks during the HPP treatment. In this film, most of the properties changed more in the presence of oil as the food simulant.