Thử nghiệm sản xuất cellulose vi khuẩn (BC) từ bùn giấy với quy mô pilot và ứng dụng làm phụ liệu tăng cường chất lượng giấy

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Tác giả: Lê Tuyết Thư Huỳnh, Quyền Huỳnh, Hữu Phước Lê, Nguyễn Phúc Thiên Lê, Tấn Nhân Từ Lê, Thục Tri Nguyên Ngô, Đình Quân Nguyễn, Phạm Tú Uyên Nguyễn, Thị Thanh Hương Võ

Ngôn ngữ: vie

Ký hiệu phân loại:

Thông tin xuất bản: Tạp chí Môi trường, 2023

Mô tả vật lý: tr.45976

Bộ sưu tập: Báo, Tạp chí

ID: 344275

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Nghiên cứu này được thực hiện với mục tiêu thử nghiệm sản xuất cellulose vi khuẩn (BC) từ bùn giấy ở quy mô pilot và đánh giá ứng dụng của BC như một chất độn tăng cường trong sản xuất giấy giấy. Phương pháp thực nghiệm, thu thập và phân tích số liệu, kết hợp với cân bằng vật chất và năng lượng đã được sử dụng để đánh giá hiệu quả sản xuất BC quy mô pilot. Để đánh giá chất lượng giấy, các phương pháp đo độ bục, độ nén vòng và kính hiển vi điện tử quét đã được áp dụng. Kết quả thu được ghi nhận như sau: Từ 100 kg bùn giấy ướt/ mẻ (độ ẩm: 83,5%), quá trình thủy phân với acid sulfuric (H2SO4) và lên men với vi khuẩn Acetobacter xylinum đã tạo ra 132,3kg BC ướt (độ ẩm 96% khối lượng). Năng lượng cần thiết để sản xuất một mẻ là 96,65 MJ. Trong đó, năng lượng cung cấp cho nồi hơi chiếm lượng lớn nhất (76,93 MJ) so với các thiết bị còn lại. Giấy sản xuất được trộn với 20% BC có độ bục là 2,00 kgf/cm2 (0% BC là 1,37 kgf/cm2), và độ nén vòng đạt giá trị cao nhất là 12,89 kgf/m tại 12% BC. Như vậy BC đã được chứng minh rằng đây là một chất độn giúp tăng các đặt tính của giấy.This study was carried out with the objective of testing the production of bacterial cellulose (BC) from paper waste sludge on a pilot scale and evaluating the application of BC as a reinforcing filler in pulp paper production. Experimental methods, data collection and analysis, combined with material and energy balance were used to evaluate the efficiency of pilot-scale BC production. To evaluate paper quality, methods of measuring bursting, ring compression and scanning electron microscopy were applied. The results obtained were recorded as follows: From 100 kg of wet paper sludge/batch (humidity: 83.5%), hydrolysis with sulfuric acid (H2SO4) and fermentation with Acetobacter xylinum bacteria produced 132.3kg of wet BC (96% moisture by weight). The energy required to produce one batch is 96.65 MJ. In particular, the energy supplied to the boiler accounts for the largest amount (76.93 MJ) compared to the remaining devices. Paper produced mixed with 20% BC has a bursting strength of 2.00 kgf/cm2 (0% BC is 1.37 kgf/cm2), and ring compression reaches the highest value of 12.89 kgf/m at 12 % BC. Thus, BC has been proven to be a filler that helps increase the properties of paper.

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