Analyses of Paper and Wood Components during Recycling Process

回收过程中纸张和木材成分的分析

基本信息

批准号：
08456085
负责人：
ISOGAI Akira
金额：
$ 4.86万
依托单位：
The University of Tokyo
依托单位国家：
日本
项目类别：
Grant-in-Aid for Scientific Research (B)
财政年份：
1996
资助国家：
日本
起止时间：
1996 至 1998
项目状态：
已结题

来源：
https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-08456085/
关键词：
Recycled paper Recycling Deinking Paper Wood Biodegradability Incinerated ash Wet end additives フローテーション

项目摘要

A.Quantitative determination methods of paper and wood components such as sizes, retention aides, strength additives, fillers and others have been established using pyrolysis-gas chromatography, enzymatic hydrolysis followed by bio-sensor measurement and X-ray fluorescence analysis.B.Most paper additives such as sizes, retention aids, strength additives and fillers were removed from pulp fibers by defibrating and de-inking processes of the recycled paper. These paper additive components rejected from recycled pulp fibers are classified into abolished fractions, which are eventually incinerated to ash.C.When amylase was added to de-inking mixture of copied waste paper under neutral conditions, removal ability of the residual toners from the recycled pulp was improved. However, the toner components removed from the pulp are now treated by incineration in recycling paper mills.D.Sludge and incinerated ash samples were collected from pulp and paper mills in Japan, and their elements were determined using an X-ray fluorescent analyzer. As reference samples, incinerated ash samples were collected from public garbage incineration centers. Also charcoal samples prepared from woody garbage of scrapped house were collected. The results show that main elements in the sludge and incinerated ash from pulp and paper mills are calcium, silica and aluminum, and these three elements occupied more than 60% of the samples. Also the incinerated ashes from public garbage incineration centers has Quite similar components to those from pulp and paper mills. Thus, the main components in public garbage must be paper and its related materials.

A.利用热解气相色谱法、酶水解法、生物传感器测量法和X射线荧光分析法，建立了纸张和木材成分如施胶剂、助留剂、强度添加剂、填料等的定量测定方法。通过再生纸的离纤和脱墨工艺，从纸浆纤维中除去纸张添加剂，例如施胶剂、助留剂、强度添加剂和填料。这些从回收纸浆纤维中排出的造纸添加剂成分被分类为废弃部分，最终被焚烧成灰烬。纸浆得到改善。然而，从纸浆中去除的墨粉成分现在在回收造纸厂中通过焚烧进行处理。D.从日本的纸浆和造纸厂收集污泥和焚烧灰样品，并使用X射线荧光分析仪测定其元素。作为参考样品，从公共垃圾焚烧中心收集焚烧灰样品。还收集了从废弃房屋的木质垃圾中制备的木炭样品。结果表明，制浆造纸厂污泥和焚烧灰中的主要元素为钙、二氧化硅和铝，这三种元素占样品的60%以上。此外，公共垃圾焚烧中心的焚烧灰烬与纸浆和造纸厂的灰烬成分非常相似。由此可见，公共垃圾的主要成分必定是纸张及其相关材料。