Transformation of pulp and paper mill sludge (PPMS) into a glucose-rich hydrolysate using green chemistry: Assessing pretreatment methods for enhanced hydrolysis

Naicker, Justin Emmanuel; Govinden, Roshini; Lekha, Prabashni; Sitholé, Bruce

doi:10.1016/j.jenvman.2020.110914

Cited by 21 publications

(9 citation statements)

References 116 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Still, the main compounds are heavy metals in a wide range including copper, cadmium, chromium, lead, mercury, nickel, silver, zinc, platinum, and others [33]. Some studies have used inorganic sludge in value-added applications, for co-products in the manufacturing process [34], which are generally directed to the construction sector [35].…”

Section: Steel-wire-drawing Sludge Productionmentioning

confidence: 99%

Solar Drying of Sludge from a Steel-Wire-Drawing Industry

Matias Gonçalves,

Mendoza-Martinez,

Alves Rocha

et al. 2023

Energies

View full text Add to dashboard Cite

Steel is a crucial industrial product with applications in various sectors, such as construction, engineering, and industry. However, the steel industry generates significant waste, contributing to greenhouse gas emissions and environmental challenges. To address this issue, incorporating solid waste, especially sludge with high moisture content, into the steel industry’s operations is essential. This study aimed to construct and test an active indirect solar dryer for reducing the moisture content of sludge from a steel drawing industry. By employing principles of the circular economy and the environmental, social, and governance concept, the drying process showed promising results, achieving approximately 42% moisture reduction. This study involved collection and characterization of industrial sludge, design and assembly of a hybrid active indirect solar dryer, fluid dynamic analysis of the behavior of the air inside the device through CFD Ansys software 2012, tests with a thermographic camera to validate the simulation, and optimization of the sludge drying by calculating the thermal efficiency and drying efficiency of the equipment. The adoption of such drying processes can lead to substantial cost reductions in the transportation, handling, and landfilling of steel-drawing sludge, promoting innovation and aiding global steel industries in achieving their solid waste disposal targets.

show abstract

Section: Steel-wire-drawing Sludge Productionmentioning

confidence: 99%

Solar Drying of Sludge from a Steel-Wire-Drawing Industry

Matias Gonçalves,

Mendoza-Martinez,

Alves Rocha

et al. 2023

Energies

View full text Add to dashboard Cite

show abstract

“…Enzymatic hydrolysis is a promising approach for the derivation of sugars from paper industry sludge. Other valuable products can be obtained by causing the fermentation of sugars ( Naicker et al, 2020 ). Production of biofuels such as bioethanol could be successfully achieved by the conversion of pulp and paper industry waste mainly composed of cellulose, hemicellulose, and lignin contents.…”

Section: Socs From Paper Industry Wastesmentioning

confidence: 99%

Synthetic Organic Compounds From Paper Industry Wastes: Integrated Biotechnological Interventions

Jaiswal

Gupta

Panchal

et al. 2021

Front. Bioeng. Biotechnol.

View full text Add to dashboard Cite

Synthetic organic compounds (SOCs) are reported as xenobiotics compounds contaminating the environment from various sources including waste from the pulp and paper industries: Since the demand and production of paper is growing increasingly, the release of paper and pulp industrial waste consisting of SOCs is also increasing the SOCs’ pollution in natural reservoirs to create environmental pollution. In pulp and paper industries, the SOCs viz. phenol compounds, furans, dioxins, benzene compounds etc. are produced during bleaching phase of pulp treatment and they are principal components of industrial discharge. This review gives an overview of various biotechnological interventions for paper mill waste effluent management and elimination strategies. Further, the review also gives the insight overview of various ways to restrict SOCs release in natural reservoirs, its limitations and integrated approaches for SOCs bioremediation using engineered microbial approaches. Furthermore, it gives a brief overview of the sustainable remediation of SOCs via genetically modified biological agents, including bioengineering system innovation at industry level before waste discharge.

show abstract

“…β-Glucosidases from Aspergillus and Trichoderma sp. have been commercialised and are currently used in industrial applications including cellulose hydrolysis, however, their commercial preparations are a huge cost factor for industries [33] . Therefore, there is a need to search for a novel thermophilic, glucose tolerant βglucosidase producer able to withstand basic to slightly acidic environments.…”

Section: Introductionmentioning

confidence: 99%

Purification and Characterization of a Glucose tolerant β-Glucosidase from a Newly Isolated Neofusicoccum Parvum strain F7: Production Optimization using Plackett Burman and Box Behnken

Singh

Sitholé

Kumar

et al. 2023

Preprint

Self Cite

View full text Add to dashboard Cite

Endoglucanases, exoglucanases and β-glucosidases act synergistically to hydrolyse cellulose into glucose monomers. Thus, this study aimed to improve production of a β-glucosidase from a newly isolated Neofusicoccum parvum strain F7 by optimizing the culture conditions and medium components using Plackett-Burman Design (PBD) and Box Behnken Design (BBD). β-Glucosidase production was significantly enhanced (p-value≤0.05) by 1.5-fold to 2.5 U/ml by BBD as compared to the preliminary one variable at a time (OVAT) experiments of (1.6 U/ml). The optimal conditions for enzyme production by BBD were 12 days of fermentation at 20°C, 175 rpm, 0.5% glycerol and 1.5% casein in 50 mM sodium phosphate (pH 6.0) buffer. Three β-glucosidase isoforms referred to as Bgl1, Bgl2, Bgl3 were purified and characterized from the optimized crude extract displaying IC50 values of 2.6, 22.6 and 319.5 mM for glucose, respectively. Bgl3 with a molecular weight of approximately 65 kDa displayed the highest tolerance to glucose among the isoforms. The optimum activity and stability for Bgl3 was observed at pH 4.0 in 50 mM sodium acetate buffer with 80% β-glucosidase residual activity retained for three hours. This isoform also retained 60% residual activity at 65°C for one hour which was then reduced to 40 % which remained stable for another 90 minutes. The β-Glucosidase activity of Bgl3 was not enhanced after the addition of metal ions in assay buffers. The Km and vmax for 4-nitrophenyl-β-D-glucopyranoside were found to be 1.18 mM and 28.08 µmol/min, respectively indicating high affinity to the substrate. The ability to withstand the presence of glucose in conjunction with its thermophilic nature indicates promise for the enzyme in industrial application.

show abstract

Transformation of pulp and paper mill sludge (PPMS) into a glucose-rich hydrolysate using green chemistry: Assessing pretreatment methods for enhanced hydrolysis

Cited by 21 publications

References 116 publications

Solar Drying of Sludge from a Steel-Wire-Drawing Industry

Solar Drying of Sludge from a Steel-Wire-Drawing Industry

Synthetic Organic Compounds From Paper Industry Wastes: Integrated Biotechnological Interventions

Purification and Characterization of a Glucose tolerant β-Glucosidase from a Newly Isolated Neofusicoccum Parvum strain F7: Production Optimization using Plackett Burman and Box Behnken

Contact Info

Product

Resources

About