scholarly journals Valorization of Wheat Byproducts for the Co-Production of Packaging Material and Enzymes

Energies ◽  
2020 ◽  
Vol 13 (6) ◽  
pp. 1300 ◽  
Author(s):  
Pedro F Souza Filho ◽  
Akram Zamani ◽  
Jorge A Ferreira
Keyword(s):  
Mechanical Properties ◽  
Packaging Material ◽  
Management Systems ◽  
Lignocellulosic Materials ◽  
Biological Pretreatment ◽  
Molding Method ◽  
Enzyme Recovery ◽  
Anaerobic Biodegradability ◽  
Statistical Effect ◽  
The World

Waste management systems are overloaded with huge streams of plastic, a large part of this being originated from packaging. Additionally, the production of wheat, one of the most cultivated crops in the world, generates low-value lignocellulosic materials, which are mostly discarded. In this study, the wheat lignocellulosic byproducts straw and bran were used for the co-production of enzymes and bio-based materials with possible application as packaging via the compression molding method. The mechanical properties of the films were studied based on the effects of the removal of lignin by alkali and biological pretreatment, the growth of filamentous fungi, the size of the particles, and the enzyme recovery. Generally, the straw films were stiffer than the bran ones, but the highest Young’s modulus was obtained for the biologically pretreated bran (1074 MPa). The addition of a step to recover the fungal cellulases produced during the cultivation had no statistical effect on the mechanical properties of the films. Moreover, alkali and biological pretreatments improved the anaerobic biodegradability of the straw films. Thus, the wheat bran and straw can be used for the co-production of enzymes, materials, and biogas, potentially changing how wheat and packaging wastes are managed.

REGULARITIES OF THE PREPARATION OF RUSSIAN ENTERPRISES FOR CERTIFICATION OF COMPLIANCE WITH ISO 9000 SERIES

2019 ◽  
Vol 6 (3) ◽  
pp. 54-60
Author(s):  
Mikhail Jurievich Rudiuk ◽  
Anastasiia Vladislavovna Gerasimova ◽  
Ekaterina Mikhailovna Pomozova
Keyword(s):  
Quality Management ◽  
Iso 9000 ◽  
World Market ◽  
Practical Significance ◽  
Management Systems ◽  
Quality Management Systems ◽  
Strict Adherence ◽  
The World ◽  
Legislative Framework ◽  
Current Stage

The authors' task was to analyze the development of quality management systems at the current stage in Russia, as well as at the previous stage in the USSR. As a result, we came to the conclusion that the factors stimulating the implementation of ISO 9000 standards are the need to promote products on the world market, as well as the possibility of receiving orders from the state. In the future, strict adherence to these standards will allow enterprises to significantly reduce the likelihood of lawsuits from consumers, which is important in the context of the development of the legislative framework and increased control over the business. The practical significance of the article is the possibility of familiarizing management and personnel with quality services, whose task is to prepare for certification for compliance with ISO 9000 standards in how this process took place in other companies. The originality of this work is to summarize the experience of implementation of ISO 9000 standards at enterprises and to analyze the factors contributing to or hindering this process.

scholarly journals Starch–Mucilage Composite Films: An Inclusive on Physicochemical and Biological Perspective

Polymers ◽  
2021 ◽  
Vol 13 (16) ◽  
pp. 2588
Author(s):  
Mansuri M. Tosif ◽  
Agnieszka Najda ◽  
Aarti Bains ◽  
Grażyna Zawiślak ◽  
Grzegorz Maj ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Barrier Properties ◽  
Edible Films ◽  
Packaging Material ◽  
Polymer Materials ◽  
Synthesis Process ◽  
Packaging Materials ◽  
Packaging Film ◽  
Biodegradable Packaging ◽  
Effective Manner

In recent years, scientists have focused on research to replace petroleum-based components plastics, in an eco-friendly and cost-effective manner, with plant-derived biopolymers offering suitable mechanical properties. Moreover, due to high environmental pollution, global warming, and the foreseen shortage of oil supplies, the quest for the formulation of biobased, non-toxic, biocompatible, and biodegradable polymer films is still emerging. Several biopolymers from varied natural resources such as starch, cellulose, gums, agar, milk, cereal, and legume proteins have been used as eco-friendly packaging materials for the substitute of non-biodegradable petroleum-based plastic-based packaging materials. Among all biopolymers, starch is an edible carbohydrate complex, composed of a linear polymer, amylose, and amylopectin. They have usually been considered as a favorite choice of material for food packaging applications due to their excellent forming ability, low cost, and environmental compatibility. Although the film prepared from bio-polymer materials improves the shelf life of commodities by protecting them against interior and exterior factors, suitable barrier properties are impossible to attain with single polymeric packaging material. Therefore, the properties of edible films can be modified based on the hydrophobic–hydrophilic qualities of biomolecules. Certain chemical modifications of starch have been performed; however, the chemical residues may impart toxicity in the food commodity. Therefore, in such cases, several plant-derived polymeric combinations could be used as an effective binary blend of the polymer to improve the mechanical and barrier properties of packaging film. Recently, scientists have shown their great interest in underutilized plant-derived mucilage to synthesize biodegradable packaging material with desirable properties. Mucilage has a great potential to produce a stable polymeric network that confines starch granules that delay the release of amylose, improving the mechanical property of films. Therefore, the proposed review article is emphasized on the utilization of a blend of source and plant-derived mucilage for the synthesis of biodegradable packaging film. Herein, the synthesis process, characterization, mechanical properties, functional properties, and application of starch and mucilage-based film are discussed in detail.

Frost Heaving Soil Road Use Synthetic Adhesive Reinforcement Method

2013 ◽  
Vol 740 ◽  
pp. 759-762
Author(s):  
Hao Zeng Bao
Keyword(s):  
Mechanical Properties ◽  
Industrial Waste ◽  
Construction Materials ◽  
Reference Value ◽  
Physical And Mechanical Properties ◽  
Road Construction ◽  
Experimental Methods ◽  
Frost Heaving ◽  
The World ◽  
Rock And Soil

In many areas, there are still a development road construction materials, traditionally, often use reinforced concrete, asphalt and other adhesive method to strengthen the low strength of rock and soil anti-freeze expansion coefficient; And now all countries in the world are studying how to use industrial production waste development of new composite materials. One of the most development potential, the production of industrial waste - slime. This paper USES the Russian kazan national construction university experimental methods, in the experiment to improve frost heaving soil physical and mechanical properties of the method for the synthesis of adhesive, based on the feasibility and applicability, environmental assessment of research and analysis, for the use of adhesive put forward a lot of reference value.

scholarly journals Mechanical and Material Properties of Mortar Reinforced with Glass Fiber: An Experimental Study

Materials ◽  
2021 ◽  
Vol 14 (3) ◽  
pp. 698 ◽  
Author(s):  
Marcin Małek ◽  
Mateusz Jackowski ◽  
Waldemar Łasica ◽  
Marta Kadela ◽  
Marcin Wachowski
Keyword(s):  
Mechanical Properties ◽  
Tensile Strength ◽  
Glass Fibers ◽  
Progressive Increase ◽  
Split Tensile Strength ◽  
Glass Waste ◽  
Poisson Coefficient ◽  
Recycled Glass ◽  
Setting Times ◽  
The World

The progressive increase in the amount of glass waste produced each year in the world made it necessary to start the search for new recycling methods. This work summarizes the experimental results of the study on mortar samples containing dispersed reinforcement in the form of glass fibers, fully made from melted glass waste (bottles). Mortar mixes were prepared according to a new, laboratory-calculated recipe containing glass fibers, granite as aggregate, polycarboxylate-based deflocculant and Portland cement (52.5 MPa). This experimental work involved three different contents (600, 1200, and 1800 g/m3) of recycled glass fibers. After 28 days, the mechanical properties such as compressive, flexural, and split tensile strength were characterized. Furthermore, the modulus of elasticity and Poisson coefficient were determined. The initial and final setting times, porosity, and pH of the blends were measured. Images of optical microscopy (OM) were taken. The addition of glass fibers improves the properties of mortar. The highest values of mechanical properties were obtained for concrete with the addition of 1800 g/m3 of glass fibers (31.5% increase in compressive strength, 29.9% increase in flexural strength, and 97.6% increase in split tensile strength compared to base sample).

RESEARCH LABORATORIES CONFORMING TO ISO/IEC 17025

2003 ◽  
Vol 13 (01n02) ◽  
pp. 5-9 ◽  
Author(s):  
YOSHIHIRO NARA
Keyword(s):  
Global Market ◽  
Management Systems ◽  
Technical Barrier ◽  
The World ◽  
Joint Study ◽  
Technical Barrier To Trade ◽  
Product Assessment

Many countries have promoted the multilateral commerce in the global market according to the WTO/TBT (Agreement of Technical Barrier to Trade). One of the most important factors to implement this agreement is that the trade goods should be evaluated once in the export or import country. Therefore the test laboratories for product assessment should construct the new management systems to get the same results of tests anywhere in the world. Even the research laboratories are in the same situation as well as the test laboratories because they must compare their data with others for joint study. They should be encouraged to apply the requirements of ISO/IEC 17025 to their systems.

Experimental Research on Strength of GFRP Bars in Shield Engineering

2014 ◽  
Vol 1020 ◽  
pp. 308-313
Author(s):  
Jun Liu ◽  
Hong Zhou ◽  
Hai Jun Yuan ◽  
Jing Fan Li
Keyword(s):  
Mechanical Properties ◽  
Experimental Research ◽  
Security Risks ◽  
Steel Reinforced Concrete ◽  
Retaining Structure ◽  
Supporting Structure ◽  
Gfrp Bars ◽  
The World ◽  
Structure Strength ◽  
Subway Stations

Subway stations or shield wells are often built using steel reinforced concrete supporting structure materials. These concrete retaining structure materials must be destroyed before launching and receiving of shield, so, some security risks may arise during destroying, and time limit for project may be longer, and the structure strength may be weakened; there are the same problems in crossing the existing subsidiary structure. In the supporting structure, concrete supporting structure materials have been partially substituted by GFRP bars in shield engineering in the world. In order to study the mechanical properties of GFRP bars deeply, experimental research on strength of GFRP bars have been made, and some relation shapes between stress and shear strength have been discussed; all of these are expected to make some basis for the design of GFRP concrete in shield engineering.

scholarly journals Stan i prognoza rozwoju systemu gospodarki odpadami w Europie i USA

2011 ◽  
Vol 9 (1) ◽  
pp. 101-123
Author(s):  
Krzysztof Biernat ◽  
Paulina Luiza Dziołak ◽  
Izabela Samson-Bręk
Keyword(s):  
European Union ◽  
Waste Management ◽  
Energy Use ◽  
Developed Countries ◽  
Waste To Energy ◽  
Management Systems ◽  
The European Union ◽  
The World

This article presents waste management in the world and in some highly developed countries in the European Union such as Germany, Netherlands, and Sweden. The article presented also waste management systems in these countries, with special attention to the processes of energy use of waste (Waste to Energy - WTE) in existing plants.

scholarly journals Effect of Water on Some Mechanical Properties for Sawdust and Chopped Reeds /UPE composites

2011 ◽  
Vol 8 (2) ◽  
pp. 551-560
Author(s):  
Baghdad Science Journal
Keyword(s):  
Mechanical Properties ◽  
Weight Gain ◽  
Flexural Strength ◽  
Young’S Modulus ◽  
Polyester Resin ◽  
Young's Modulus ◽  
Unsaturated Polyester ◽  
Molding Method ◽  
Effect Of Water ◽  
Composite Samples

In this study, composite materials were prepared using unsaturated polyester resin as binder with two types of fillers (sawdust and chopped reeds). The molding method is used to prepare sheets of UPE / sawdust composite and UPE / chopped reeds composite. The mechanical properties were studied including flexural strength and Young's modulus for the samples at normal conditions (N.C). The Commercial wood, UPE and its composite samples were immersed in water for about 30 days to find the weight gain (Mt%) of water for the samples, also to find the effect of water on their flexural strength and Young's modulus. The results showed that the samples of UPE / chopped reeds composite gained highest values of flexural strength (24.5 MPa) and Young's modulus (5.1 GPa) as compared with other composites at (N.C). The results showed that the wet samples of sawdust composite have lowest values of weight gain (Mt %) of water (0.043%) as compared with other composites after immersion. Also it’s showed a slight decrease in values of Young's modulus for all the samples after immersion as compared with the samples at (N.C). Finally it’s showed a slight decrease in values of flexural strength for all the samples except for the composite material formed from UPE / chopped reeds which showed an increase in the value of flexural strength after immersion, where the wet samples of UPE / chopped reeds composite gained (29 MPa) as compared with the samples at (N.C).

Sign in / Sign up

Export Citation Format

Share Document