The Basic Technologies of De-inking Agent and Its Functionalization

Shimoyama, R.

doi:10.2524/jtappij.65.994

Cited by 4 publications

(1 citation statement)

References 3 publications

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“…However, several types of deinking agents are used by paper manufacturers, and the determination of proper decomposition conditions for various types of deinking agents is time-consuming. Currently, higher alcohol derivatives are the most commonly used deinking agents [27], and their decomposition conditions are generally milder than those for halide antiseptics. Consequently, the decomposition conditions of the antiseptics in the Fujiseishi PS could simultaneously decompose the deinking agents at the same time.…”

Section: Pretreatment Of Ps With Antisepticmentioning

confidence: 99%

Bioethanol production from paper sludge containing antiseptic and deinking agent by subcritical water pretreatment and semi-simultaneous saccharification and fermentation

Okajima,

Muto,

Morimoto

et al. 2024

Preprint

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For a long time, bioethanol production from wood-based biomass has been investigated. However, most studies face issues including high costs and technical difficulties associated with delignification and saccharification. Paper sludge (PS) from paper mills has a significant potential for bioethanol production. In this study, waste-paper-containing PS is used as the raw material for bioethanol production because the annual waste paper utilization rate has increased. Although PS does not require delignification, the antiseptics and deinking agents in PS inhibit enzymatic reactions such as saccharification and fermentation and their removal has not yet been reported. Using subcritical water pre-treatment, the selective decomposition of enzyme inhibitors in PS is examined without the generation of other enzyme inhibitors. The optimum pretreatment conditions are identified as 240°C, 3.3 MPa, 3 min, and pH 4.5. Glucose was obtained in 71% yield from pretreated 5 wt% PS using cellulase, which is 5.5 times higher than that from unpretreated PS. This is because the reactivity of the pretreated PS increases with the surface area of the cellulose fibers, and the cellulase inhibitors are decomposed by subcritical water. Next, semi-simultaneous saccharification and fermentation treatments are performed to produce bioethanol from waste-paper-containing PS. The bioethanol yield based on cellulose after 96 h is 68% for PS pretreated with subcritical water, whereas the bioethanol yield is 6% for unpretreated PS. Therefore, subcritical water pretreatment increases the bioethanol yield by 11 times. Proposed method allows large amount of PS to be used as ethanol feedstock in future.

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Section: Pretreatment Of Ps With Antisepticmentioning

confidence: 99%

Bioethanol production from paper sludge containing antiseptic and deinking agent by subcritical water pretreatment and semi-simultaneous saccharification and fermentation

Okajima,

Muto,

Morimoto

et al. 2024

Preprint

View full text Add to dashboard Cite

show abstract

Bioethanol Production from Paper Sludge by Subcritical Water Pretreatment and Semi-simultaneous Saccharification and Fermentation

Okajima,

Muto,

Morimoto

et al. 2024

Bioenerg. Res.

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Analysis and Countermeasures against Stickies Occurring at Deinked Pulp Process

Ougiya¹

2012

J. Tappi J.

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In Hachinohe mill, deinked pulp(DIP)with high brightness is produced. The pulp is mainly made of sorted colored ledger. However, the procurement of sorted colored ledger has become difficult by the rising price of all over waste paper. Therefore, we are forced to use several types of waste paper such as waste magazine. With the increase of usage of waste magazine, quality trouble caused by stickies was increasing.To reduce the stickies, we analyzed the DIP process and characteristic of the stickies. The stickies become small through the process not only by shearing force but also by chemical function. Much stickies was removed by screening than by floatation, but we recognized that the floatator was able to remove problematic stickies. As a result, improvement of removal of the stickies by floatation induced achievement of decrease of the quality trouble.

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The Basic Technologies of De-inking Agent and Its Functionalization

Cited by 4 publications

References 3 publications

Bioethanol production from paper sludge containing antiseptic and deinking agent by subcritical water pretreatment and semi-simultaneous saccharification and fermentation

Bioethanol production from paper sludge containing antiseptic and deinking agent by subcritical water pretreatment and semi-simultaneous saccharification and fermentation

Bioethanol Production from Paper Sludge by Subcritical Water Pretreatment and Semi-simultaneous Saccharification and Fermentation

Analysis and Countermeasures against Stickies Occurring at Deinked Pulp Process

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