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頁籤選單縮合
題 名 | 廢紙酵素脫墨之研究=Studies on the Enzymatic Deinking of Wastepaper |
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作 者 | 蘇裕昌; 趙善源; 李淑靜; 葉若鋆; | 書刊名 | 臺灣林業科學 |
卷 期 | 17:4 2002.12[民91.12] |
頁 次 | 頁439-449 |
分類號 | 476.1 |
關鍵詞 | 廢紙脫墨; 酵素脫墨; 脫墨漿性質; 纖維素分解酵素; 半纖維素分解酵素; 油脂分解酵素; Deinking; Enzymatic deinking; Properties of deinked pulp; Cellulase; Hemicellulase; Lipase; |
語 文 | 中文(Chinese) |
中文摘要 | 本研究以纖維素分解酵素、半纖維素分解酵素、前述兩者之混合酵素及脂肪分 解酵素對回收新聞廢紙及影印廢紙進行酵素脫墨試驗,比較與傳統脫墨法之脫墨效率以及脫 墨漿物理特性,確立酵素脫墨法之理想流程,並探討回收報紙及影印紙脫墨的酵素種類、酵 素脫墨漿之應用及酵素脫墨漿之各項性質,以建立兩種廢紙酵素脫墨法。新聞廢紙的酵素脫 墨在酵素處理後只需洗滌處理即可獲良好的脫墨效果,但影印廢紙的酵素脫墨必須配合洗 滌及浮選處理,才可達到理想的脫墨效果。酵素處理時間即添加酵素後之散漿峙間之長短 影響再生漿白度的下降及強度的變化,在3O min時可發揮最佳脫墨效果及綜合紙力。在酵素 處理影印紙時;再生漿得率、強度等隨酵素添加量有下降之趨勢,雖不同酵素有不同之理想 添加量,其有效應用範圍各酵素可能應用量約1.O unlts/g paper左右,即每克紙漿使用1 單位酵素活性之酵素。但理想使用量仍需以試驗驗證。影印廢紙利用多種酵素配合處理,二 次浮選等處理可改善脫墨酵素效率及紙性。為了提升影印廢紙之脫墨效率可利用鹼浸漬處理 改善纖維膨潤之處理性,且可促進脫墨效率提升到99%以上並改善紙張性質 |
英文摘要 | Rhe aim of this paper was to establish a deinking method for old newsprint and xerographic paper using commercially available cellolytic and hemicellolytic enzymes, or their mixtures and lipase. Comparisons of deinking effieiencies between conventional and enzymatic deinking was make for these wastepapers. The optimal deinking process was established by evaluating the physical properties of the resulting pulps and the ink removal efficiencies. For old newsprint, deinking efficiency and deinked pulp with acceptable properties could be obtained from a single-stage washing deinking after enzymatic treatments. For old xerographic paper, enzymatic deinking with both washing and flotation was needed. Increases in enzymatic treatment time in the pulper resulted in pulp brightness loss and strength reduction. A30-min. treatment time led to high deinking efficiency and strength. Increasing the enzyme dosage in the pulper resulted in better ink speck removal efficiency, but overdosage caused pulp yield loss and pulp strength reduction. Even though different enzymes had their own optimal dosages, a reasonable dosage was about 1 unit of enzyme activity per gram of paper substance. In order to develop better ink removal effieiencies, various treatments were tried including multiple enzyme addition, secondary flotation, and alkaline presoaking before enzymatic treatment. The results showed great improvements I ink removal efficiency. Results of the alkaline presoaking treatment indicate that alkali improved the wettability and swelling of the fiber surfaces and achieved ink removal effieiencies of 99% or higher. Moreover, the characteristics of the resulting pulps were also improved. |
本系統中英文摘要資訊取自各篇刊載內容。