Mondal Subhadeep, Biswal Divyajyoti, Pal Kalyanbrata, Rakshit Subham, Kumar Halder Suman, Mandavgane Sachin A, Bera Debabrata, Hossain Maidul, Chandra Mondal Keshab
Center for Life Sciences, Vidyasagar University, Midnapore 721102, West Bengal, India.
Visvesvaraya National Institute of Technology, Nagpur 440010, Maharashtra, India.
Bioresour Technol. 2022 Jun;353:127078. doi: 10.1016/j.biortech.2022.127078. Epub 2022 Apr 6.
The present study aimed to enzymatic deinking of waste papers and to valorize the effluent for biobutanol production. Application of fungal enzymatic cocktail (cellulase, amylase, xylanase, pectinase, lipase, and ligninase) on office used paper, newspaper, and ballpen written paper leading to improvement in brightness (84.91, 72.51, 76.69 % ISO), InKd (82.89, 68.95, 76.49%), κ-number (12.9, 13.6, and 13.1), opacity (27.91, 30.07, and 2.85%), tensile strength (49.24, 45.31, and 46.98 Nm/g), respectively and indices were consistent with chemical treated pulps. The quality of effluent generated during enzymatic deinking in respect to BOD and COD level was eco-friendlier than the chemical process. The enzyme-treated effluent was employed as supporting substrate for butanol (18.4 g/l) production by Clostridium acetobutylicum ATCC824. Material balance and life cycle assessment of the whole processes were evaluated to validate its industrial and environmental relevance.
本研究旨在对废纸进行酶法脱墨，并将废水用于生物丁醇生产以实现其价值。将真菌酶混合物（纤维素酶、淀粉酶、木聚糖酶、果胶酶、脂肪酶和木质素酶）应用于办公用纸、报纸和圆珠笔书写纸，可提高纸张的亮度（分别为84.91%、72.51%、76.69% ISO）、油墨去除率（分别为82.89%、68.95%、76.49%）、卡伯值（分别为12.9、13.6和13.1）、不透明度（分别为27.91%、30.07%和2.85%）、拉伸强度（分别为49.24、45.31和46.98 Nm/g），各项指标与化学处理纸浆一致。酶法脱墨过程中产生的废水在生化需氧量和化学需氧量水平方面比化学法更环保。酶处理后的废水用作丙酮丁醇梭菌ATCC824生产丁醇（18.4 g/l）的辅助底物。对整个过程进行了物料平衡和生命周期评估，以验证其工业和环境相关性。
