Problems and prospects for the application of microorganisms in the disposal of lignocellulose waste

Bolotnikova, O. I.; Mikhailova, N. P.; Базарнова, Ю Г; Аронова, Е. Б.; Bolotnikova, Tatiana; Акинина, Ю. Н.

doi:10.21285/2227-2925-2019-9-4-679-693

Cited by 3 publications

(4 citation statements)

References 8 publications

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“…As shown, the main part of the waste generated at a pulp and paper mill is organic residues, since wood, in addition to cellulose (the share of which varies between 35 and 51% for different species and places of growth), contains other polymers, in particular hemicellulose and lignin. Depending on the method of pulping, organic waste is present as either black liquor from sulfate pulping (estimated, on average, to be 7 tons per ton of pulp, Grigorai 2012) or as sulfite liquors from sulfite pulping (estimated at 6-8 cubic meters per ton of pulp, Bolotnikova et al 2019aBolotnikova et al , 2019b. The most common method of pulp production is the sulfate method.…”

Section: 1mentioning

confidence: 99%

“…The expansion of the use of recycled bioethanol adds to the listed environmental benefits of the circular effects of closed economies. The complexity of the technology for processing hemicellulose into bioethanol lies, first, in the requirement for the resistance of yeast Candida shehatae and Pichia stipities producers to the influence of toxicants contained in the initial solution and, second, in the inability of most Saccharomyces strains to alcohol conversion of pentoses of hemicellulose, along with hexoses (Bolotnikova et al 2019a(Bolotnikova et al , 2019b. The composition of sugars also mainly depends on the wood species.…”

Section: 1mentioning

confidence: 99%

“…The existing developments of complex methods for preliminary detoxification of sulfite liquor substrates provide a depth of selective extraction sufficient to maintain the alcohol-forming activity of xylose-assimilating yeast P. tannophilus on sulfite-alkali wort (Bolotnikova et al 2019a(Bolotnikova et al , 2019b. A strain of P. tannophilus Y-1533 has been identified, which has biotechnological prospects for the alcohol conversion of hexoses and pentoses of sulfite liquor, and the results obtained can serve as initial parameters for its laboratory regulations.…”

Section: 1mentioning

confidence: 99%

“…However, the microaerobic conditions are necessary for pentose fermentation by xylose-assimilating yeasts Pachysolen tannophilus. So, the rate control should be especially needed in the case of the oxygen supply to the fermentation medium (Bolotnikova et al 2019a(Bolotnikova et al , 2019b.…”

Section: 1mentioning

confidence: 99%

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Biotechnological Basis of the Pulp and Paper Industry Circular Economic System

Kvasha,

Bolotnikova,

Malevskaia-Malevich

2023

Economies

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To ensure development sustainability, the linear economic approach is being transformed into a cyclical model. For the pulp and paper industry (PPI), which occupies a significant place in the Russian economy, the shift of circular principles to the field of bioeconomics is becoming more important. This requires the development of basic biotechnological approaches implemented in closed cycles (biorefining). The aim of this study was to develop the biotechnological foundations of the circular economic system of the pulp and paper industry. To achieve the goal, the factors for the implementation of the circular mechanism in the pulp and paper industry were established. The composition of pulp and paper waste was systematized, taking into account the places of their occurrence; the directions and forms of the biorefining of pulp and paper secondary renewable resources were determined; and the principal possibility of obtaining bioethanol, based on the whole complex of sugars from cellulose production wastes, is shown. A wide range of general scientific methods was involved (analysis, synthesis, classification, modeling, etc.). Statistical methods were used to process experimental results in the field of pulp and paper waste bioconversion. The biotechnologies involved included methods of destruction, detoxification, and conversion of useful resources into secondary raw materials and final products. From the standpoint of the environmental approach, there are serious efficiency imbalances in the pulp and paper industry, which justify the implementation of circular mechanisms for organizing economic systems. The overall efficiency is ensured by the use of renewable resources and obtaining environmental effects. Algorithms and parameters of green biotechnological regulations for pulp and paper industry waste recycling provide the possibility of microbiological production of a complex of products: biocomposites, bioplastics, medical products, fertilizers, feed additives, vitamin supplements, and bioenergy resources. A strategy for the efficient biochemical processing of pulp and paper waste into green ethanol was determined. The possibility of increasing the efficiency of alcoholic fermentation using various biocatalysts was experimentally confirmed. The technological features of this method, associated with the need for microaerobic fermentation modes, were determined.

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Section: 1mentioning

confidence: 99%

Section: 1mentioning

confidence: 99%

Section: 1mentioning

confidence: 99%

Section: 1mentioning

confidence: 99%

See 2 more Smart Citations

Biotechnological Basis of the Pulp and Paper Industry Circular Economic System

Kvasha,

Bolotnikova,

Malevskaia-Malevich

2023

Economies

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Features of using solid cellulose-containing domestic wastes for production of bioethanol

et al. 2020

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In this paper, we consider the process of producing biogas with a high methane content when used as a co-substrate for fermentation of plant residues of microalgae. Microalgae Chlorella sorokiniana are a valuable source for obtaining valuable components such as lipids, pigments, proteins, chlorophyll and others. After the extraction of valuable components, residual biomass is formed, which requires further disposal. In this experiment, the digestion process is carried out using an inoculant — lyophilically dried activated sludge from sewage treatment plants in Hamburg in the amount of 450 ml and residual biomass of the microalga Chlorella sorokiniana in the amount of 2.1 g. The studies were carried out in the Anaerobes Test system AMPT-II system. Fermentation produces 205 ml of methane gas.

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Influence of Hydrolytic Treatment on the Content of Reducing Substances in Neutral-Sulphite Alkali

Азатовна¹,

Вячеславовна²,

Альбертовна³

et al. 2021

JCPRM

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The aim of this work is to develop a technology for the preparation of neutral-sulfite liquors formed during the production of fibrous semi-finished products - cellulose from birch wood - for subsequent use as a nutrient medium for the cultivation of microorganisms. Acid hydrolysis was carried out at a temperature of 100 °С at a ratio of a 10% sulfuric acid solution to a liquor sample of 1 : 1. Enzymatic hydrolysis of neutral sulfite liquors was carried out with the enzyme preparations Accellerase XY and Accellerase XC at 50±2 °C and 60±2 °C. The end of hydrolysis was determined by the cessation of the increase in the content of reducing substances (RS) in the hydrolyzate. The original neutral sulphite lye contained 9.4% dry matter, 21.7 g/l of reducing substances, pH 5.3±0.2. It has been shown that as a result of enzymatic hydrolysis, the content of insoluble dry residue in the hydrolyzate decreases to 8.32% and 8.41%, respectively, and during acid hydrolysis – to 7.8%. The content of RS in neutral sulfite lye after acid hydrolysis increases by an average of 3 times, while after enzymatic hydrolysis - a maximum of 2 times. It was found by gas-liquid chromatography that pentoses predominate in the obtained hydrolysates. Microbiological processing of media with a similar carbohydrate composition is possible by a number of strains of microorganisms capable of assimilating pentoses, for example, yeast-like fungi of the Saccharomycetaceae family and bacteria of the Enterobacteriaceae family.

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Problems and prospects for the application of microorganisms in the disposal of lignocellulose waste

Cited by 3 publications

References 8 publications

Biotechnological Basis of the Pulp and Paper Industry Circular Economic System

Biotechnological Basis of the Pulp and Paper Industry Circular Economic System

Features of using solid cellulose-containing domestic wastes for production of bioethanol

Influence of Hydrolytic Treatment on the Content of Reducing Substances in Neutral-Sulphite Alkali

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