Analyses of Paper and Wood Components during Recycling Process

采用热解-气相色谱法、酶解法、生物传感器法和x射线荧光法，建立了纸和木材中浆料、助留剂、强度助剂、填料等成分的定量测定方法。通过对再生纸进行脱水和脱墨处理，可将浆料、助留剂、强度助剂和填料等大部分纸张助剂从纸浆纤维中去除。从再生纸浆纤维中剔除的纸张添加剂成分被分类为废弃组分，最终被焚烧成灰。c .在中性条件下将淀粉酶加入到再生纸浆的脱墨混合物中，可提高再生纸浆中残留碳粉的去除能力。d .从日本的纸浆和造纸厂收集了污泥和焚烧后的灰分样本，用x射线荧光分析仪测定了它们的元素。作为参考样本，焚烧灰样本收集自公共垃圾焚烧厂。并收集了废弃房屋木质垃圾制备的木炭样品。结果表明，制浆造纸污泥和焚烧灰的主要元素是钙、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厂和造纸厂的焚烧灰烬具有非常相似的成分。因此，公共垃圾的主要成分一定是纸及其相关材料。

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.