An efficient eco-friendly approach for recycling of newspaper waste

Singh, Avtar; Kaur, Amanjot; Yadav, Ravi Dutt; Mahajan, Ritu

doi:10.1007/s13205-019-1590-2

Cited by 16 publications

(6 citation statements)

References 20 publications

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“…A number of industries require cocktail of enzymes rather than a single enzyme e.g. biofuel production by hydrolysis of lignocellulosic biomass Binod et al 2019), biohydrogen production (Ye et al 2009), bio-deinking (Singh et al 2019), to enhance digestibility and nutrient availability of animal feed (Alsersy et al 2015) and detergent industry (Naganthran et al 2017). Considering the economic point, a single organism capable of elaborating multiple enzymes is preferred for such applications.…”

Section: Introductionmentioning

confidence: 99%

A novel multi-enzyme preparation produced from Aspergillus niger using biodegradable waste: a possible option to combat heterogeneous biofilms

et al. 2020

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Extracellular polymeric substance (EPS) produced by the microorganisms provides protection and stability to them when they are encased within biofilms. Heterogeneous polysaccharides form a major constituent of the EPS and are crucial for the formation and integrity of the biofilms/slime. Thus, breakdown of polysaccharides might help in dispersion of biofilms from abiotic surfaces. In the present study we isolated a fungus, Aspergillus niger APS, capable of concurrently producing a cocktail of carbohydrases and optimized the conditions for higher yields of all the enzymes by one variable at a time (OVAT) approach. The optimization studies resulted in 1.5 to 12 fold augmentation in the enzyme yields using biodegradable waste. Further, keeping in view the heterogeneous nature of polysaccharides in biofilm matrix, the in-house produced enzyme cocktail was used for the dispersal of biofilms formed by Salmonella enterica serovar Typhi, Escherichia coli and Staphylococcus aureus. Treatment with enzyme preparation caused 90.23 ± 4.0, 82.64 ± 5.0 and 76.32 ± 5.0% reduction of the biofilms formed by these organisms respectively which was also evidenced by Field emission scanning electron microscopy (FESEM) revealing the loss of biofilm architecture. Interestingly, the enzyme cocktail could also remove viscous slime formed under natural conditions in the kitchen drainage pipe (KDP). To the best of our knowledge, this is the first report on biotreatment of abiotic surfaces for removal of biofilms/slime formed under natural conditions. The study thus indicates the prospects of using multiple carbohydrases as an anti-biofouling agent on abiotic surfaces like equipments as well as implants/prostheses and pipelines.

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Section: Introductionmentioning

confidence: 99%

A novel multi-enzyme preparation produced from Aspergillus niger using biodegradable waste: a possible option to combat heterogeneous biofilms

et al. 2020

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“…Deinking with enzymes helps the removal of ink and abates environmental issues (Lee et al, 2007;Lee et al, 2013;Pathak et al, 2014;Singh et al, 2019). The enzyme-based deinking, as an environmentally friendly alternative, minimizes chemical usage and further mitigates the release of dangerous materials in water.…”

Section: Introductionmentioning

confidence: 99%

Surface characterization of pulp fiber from mixed old newspaper and magazine deinked-pulp with combined cellulase and laccase-violuric acid system (LVS)

Akbarpour

2023

Preprint

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The pulp and paper industry is looking for eco-friendly solutions in the field of enzymatic deinking for ink elimination from different recycled papers. The current research aimed at deinking secondary fibers containing mixed 70% old newsprint (ONP) and 30% old magazine (OMG) by combining cellulase with the laccase-violuric acid system (LVS). Optical and strength properties, surface chemical composition, fiber crystallinity, fiber morphology changes during the deinking process, and pulp water retention value (WRV) were assessed by electron spectroscopy for chemical analysis (ESCA), fourier transform infrared spectrometry (FTIR), field emission scanning electron microscopy (FESEM), and the centrifuge method. Results revealed the synergistic delignification and deinking effects of cellulase and LVS making enzymatic treatment a promising alternative for chemical deinking. Pulp deinked with cellulase-LVS indicated a lower ERIC (effective residual ink concentration), better optical and strength properties, a higher oxygen/carbon (O/C) ratio of the fiber surface, a lower surface lignin, higher fiber crystallinity index, and improved pulp WRV. Furthermore, FESEM photographs demonstrated that more fibrils appeared on the fiber surface due to synergistic effects between enzymes. Among the combined cellulase-LVS trials, the C2L2 trial (0.1% cellulase and 20 min; 40u laccase and 120 min) gave a paper with the best quality, the minor lignin surface coverage (or more lignin degradation), and higher cellulose crystallinity, compared to the chemically deinked pulp.

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“…After chemical deinking, improvement in the brightness of recycled paper is observed along with the released wastewater having high biological oxygen demand (BOD) and chemical oxygen demand (COD), which is resulted in a high cost of e uent treatment. During the recycling process, degradation in bre strength quality of the recycled pulp motivated researchers to develop a new environment friendly deinking approach having better de-inkability and improved quality (Lee et al, 2007;Zhang et al, 2008;Kumar et al, 2018;Shankar et al, 2018;Singh et al, 2012Singh et al, , 2019Mandeep et al, 2022). Enzymatic deinking involves the use of cellulases, hemicellulases or xylanases, amylases, lipases, pectinases, esterases and ligninolytic enzymes; making it a better approach compared to chemical deinking (Vyas and Lachke, 2003;Pathak et al, 2010Pathak et al, , 2011Pathak et al, , 2014Pathak et al, , 2015Bajpai, 2013;Lee et al, 2013).…”

Section: Introductionmentioning

confidence: 99%

Cellulase-assisted deinking approach for the recycling of mixed office waste papers and its quality improvement

Pathak

Sango

Sabharwal

et al. 2022

Preprint

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This study involves the evaluation of the potential of commercial cellulase enzyme for the deinking of mixed office waste paper. The pH and temperature optima for the enzyme were 6.0 and 50°C. Enzyme dose and reaction time for the deinking process were optimized. An optimum dose of 300 g/t and reaction time of 90 min for commercial cellulase enzyme significantly improved deinking efficiency (79.3%) than the control set (59.4%) and chemical deinking (75.7%). Strength properties (except tear index) like tensile index, breaking length, burst factor and double fold were improved at optimized conditions. Cleanliness of pulp in terms of dirt and specks contents was also improved up to a significant level after cellulase treatment. Thus, it was concluded that commercial cellulase enzyme-based deinking was better than chemical deinking of mixed office waste in terms of improved pulp and paper quality.

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An efficient eco-friendly approach for recycling of newspaper waste

Cited by 16 publications

References 20 publications

A novel multi-enzyme preparation produced from Aspergillus niger using biodegradable waste: a possible option to combat heterogeneous biofilms

A novel multi-enzyme preparation produced from Aspergillus niger using biodegradable waste: a possible option to combat heterogeneous biofilms

Surface characterization of pulp fiber from mixed old newspaper and magazine deinked-pulp with combined cellulase and laccase-violuric acid system (LVS)

Cellulase-assisted deinking approach for the recycling of mixed office waste papers and its quality improvement

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