scholarly journals Driving Forces and Inhibitors of Secondary Stock Extraction

2016 ◽  
Vol 9 (1) ◽  
pp. 11-18 ◽  
Author(s):  
Anders Kihl ◽  
Graham Aid
Keyword(s):  
Large Scale ◽  
Driving Forces ◽  
Raw Materials ◽  
Raw Material ◽  
Common Resources ◽  
The Core ◽  
Sustainable Future ◽  
Core Issue

Even though it’s well known that our common resources are limited and that recycling is key for a sustainable future; in reality we see few examples of true recycling where virgin raw material is substituted by waste. There are endless numbers of examples where waste is utilized to some extent without solving the core issue: reducing the need of extracting virgin raw materials. This article analyses some of the driving forces and inhibitors of secondary stock extraction to explore why it’s so difficult establish large scale secondary stock extraction although suitable technologies are available. The authors discuss and suggest possible ways for reducing some of the main barriers presented.

scholarly journals Driving forces and inhibitors of secondary stock extraction

2017 ◽  
Author(s):  
Anders Kihl ◽  
Graham Aid
Keyword(s):  
Driving Forces ◽  
Raw Materials ◽  
Raw Material ◽  
Common Resources ◽  
The Core ◽  
Sustainable Future ◽  
Core Issue

Even though it’s well known to mankind that our common resources are limited and that recycling is a key for a sustainable future; in reality we see few examples of true recycling where virgin raw material is substituted by waste. There are endless number of examples where waste is utilized to some extent without solving the core issue: reducing the need of extracting virgin raw materials. This article analyses some of the driving forces and inhibitors that explains why it’s so difficult establish secondary stock extraction although technology is available. The authors discuss and suggest possible ways for reducing the some of the main barriers.

Optimal Design and Techno-Economic Analysis for Corncob Particles Briquettes: A Literature Review of the Utilization of Agricultural Waste and Analysis Calculation

2021 ◽  
Author(s):  
Asep Bayu Dani Nandiyanto ◽  
Nissa Nur Azizah ◽  
Gabriela Chelvina Santiuly Girsang
Keyword(s):  
Optimal Design ◽  
Literature Review ◽  
Economic Analysis ◽  
Large Scale ◽  
Net Present Value ◽  
Raw Materials ◽  
Agricultural Waste ◽  
Raw Material ◽  
Variable Cost ◽  
Scale Production

Corncob is usually disposed of directly as waste, creating problems in the environment, while it can be converted into valuable materials. This research aimed to evaluate the literature review on briquette production from agricultural waste (using non-binder and cold press with a binder) and the current works on techno-economic analysis, to propose an optimal design for the production of briquette from corncob waste, and to perform a techno-economic analysis based on the selected optimal processing method. The engineering perspective based on stoichiometry and mass balance showed the potential corncob briquette manufacture in both home and large scales due to the possible use of inexpensive and commercially available equipment and raw materials. The economic perspective [based on several economic evaluation factors (i.e., gross profit margin, payback period, break-even point, cumulative net present value, return of investment, internal rate return, and profitability index) under ideal and non-ideal conditions by considering internal (i.e., sales, raw materials, utilities, and variable cost) and external aspects (i.e., tax)] confirmed the prospective development of the project in the large-scale production with a lifetime of more than 18 years. The main issue in the project is the raw material (i.e. tapioca flour), giving the most impact on the project’s feasibility. Even in severe conditions, the project is feasible. The great endurance was also confirmed in the case of a higher tax rate. This study demonstrates the importance of producing corncob-based briquettes for improving the economic value and giving alternatives for problem solvers in the utilization of agricultural waste.

scholarly journals Problems of mineral raw material losses of quality and quantity management in developing of large-scale complex-structure deposits.

2018 ◽  
Vol 56 ◽  
pp. 04003
Author(s):  
Sergei Tkach
Keyword(s):  
Large Scale ◽  
Raw Materials ◽  
Complex Structure ◽  
Raw Material ◽  
Qualitative And Quantitative ◽  
Mineral Raw Material ◽  
Regulatory Documents ◽  
Geological Conditions ◽  
High Degree ◽  
Very High

The article deals with the problems of mineral raw material losses of quality and quantity management in developing of large-scale complex-structure and composition deposits of solid minerals. It is shown that a very high degree of mining and geological conditions variability in time and space for the development of mining units is typical for such deposits. This significantly complicates the qualitative and quantitative operating losses setting and accounting of mineral raw materials during its extraction in the framework of existing general and industry regulatory documents. Conceptual principles for face-by-face operational setting of losses and impoverishment of minerals for the conditions of bulk mining of complex-structure deposits with the formation of gross mining flow with economically feasible and specified level of quality (the content of commercial and harmful components) are stated. These principles generally do not contradict effective instructions main provisions and are made to minimize the total operating losses during the processing of several mine sections (faces).

scholarly journals TLS and SfM Approach for Bulk Density Determination of Excavated Heterogeneous Raw Materials

Minerals ◽  
2020 ◽  
Vol 10 (2) ◽  
pp. 174 ◽  
Author(s):  
Peter Blistan ◽  
Stanislav Jacko ◽  
Ľudovít Kovanič ◽  
Julián Kondela ◽  
Katarína Pukanská ◽  
...  
Keyword(s):  
Bulk Density ◽  
Laser Scanning ◽  
Large Scale ◽  
Raw Materials ◽  
Terrestrial Laser Scanning ◽  
Mineral Resources ◽  
Point Clouds ◽  
Raw Material

A frequently recurring problem in the extraction of mineral resources (especially heterogeneous mineral resources) is the rapid operative determination of the extracted quantity of raw material in a surface quarry. This paper deals with testing and analyzing the possibility of using unconventional methods such as digital close-range photogrammetry and terrestrial laser scanning in the process of determining the bulk density of raw material under in situ conditions. A model example of a heterogeneous deposit is the perlite deposit Lehôtka pod Brehmi (Slovakia). Classical laboratory methods for determining bulk density were used to verify the results of the in situ method of bulk density determination. Two large-scale samples (probes) with an approximate volume of 7 m3 and 9 m3 were realized in situ. 6 point samples (LITH) were taken for laboratory determination. By terrestrial laser scanning (TLS) measurement from 2 scanning stations, point clouds with approximately 163,000/143,000 points were obtained for each probe. For Structure-from-Motion (SfM) photogrammetry, 49/55 images were acquired for both probes, with final point clouds containing approximately 155,000/141,000 points. Subsequently, the bulk densities of the bulk samples were determined by the calculation from in situ measurements by TLS and SfM photogrammetry. Comparison of results of the field in situ measurements (1841 kg∙m−3) and laboratory measurements (1756 kg∙m−3) showed only a 4.5% difference in results between the two methods for determining the density of heterogeneous raw materials, confirming the accuracy of the used in situ methods. For the determination of the loosening coefficient, the material from both large-scale samples was transferred on a horizontal surface. Their volumes were determined by TLS. The loosening coefficient for the raw material of 1.38 was calculated from the resulting values.

Microbial Oil Production from Lignocellulosic Biomass – Recent Development and Prospect

2014 ◽  
Vol 541-542 ◽  
pp. 397-403
Author(s):  
Zhang Nan Lin ◽  
Hong Juan Liu ◽  
Zhi Qin Wang ◽  
Jia Nan Zhang
Keyword(s):  
Lignocellulosic Biomass ◽  
Large Scale ◽  
Raw Materials ◽  
Oil Production ◽  
Renewable Resource ◽  
Raw Material ◽  
Biodiesel Production ◽  
Microbial Oil ◽  
Key Issues ◽  
Application Potential

Microbial oil is one of the ideal raw materials for biodiesel production because of its rapid reproduction and less influence by the climate and season variation. However, the high cost is one of the key issues that restricted its production in a large-scale. Lignocellulosic biomass, the cheap and renewable resource, might be the best raw material for microbial oil production by oleaginous microorganisms. Recent development on the microbial oil production from lignocellulosic biomass was summarized in this paper. Furthermore, the challenges and application potential of microbial oil were prospected.

scholarly journals Transparency with Blockchain and Physical Tracking Technologies: Enabling Traceability in Raw Material Supply Chains

2021 ◽  
Vol 5 (1) ◽  
pp. 1
Author(s):  
Angela v. Beckh Bacchetta ◽  
Volker Krümpel ◽  
Ella Cullen
Keyword(s):  
Literature Review ◽  
Supply Chains ◽  
Large Scale ◽  
Raw Materials ◽  
Physical World ◽  
Raw Material ◽  
Global Supply Chains ◽  
Academic Literature ◽  
Material Supply ◽  
Digital World

By combining blockchain with physical tracking technologies, raw materials can potentially be traced throughout their global supply chains. Physical tracking technologies enable observing how raw materials move within the physical world, whereas blockchain translates these events into the digital world with an immutable record. This paper presents a taxonomy of different physical tracking technologies and examines if and how the combination of these technologies render raw material supply chains more transparent. Although academic literature highlights the theoretical benefits of combining these transformative technologies, large scale projects are still in their early stages. Following a brief literature review, this paper leverages an empirical approach to classify different tracking technologies, their fields of application and limitations, as well as how these technologies can enable supply chain transparency. Obviously, there is no single technology that can fulfil all requirements along complex supply chains. However, the relevant combination of respective technologies can help bridge gaps by increasing transparency within supply chains.

scholarly journals Development of Advanced High Strength Automotive Steels

2021 ◽  
Vol 4 (1) ◽  
pp. 9-17
Author(s):  
Miklós Tisza
Keyword(s):  
Automotive Industry ◽  
First Generation ◽  
Driving Forces ◽  
Raw Materials ◽  
High Strength Steels ◽  
High Strength ◽  
Point Of View ◽  
Raw Material ◽  
Advanced High Strength Steels ◽  
Harmful Emissions

Abstract In recent decades, the automotive industry has faced ever-increasing demands. Increasing requirements can be observed in terms of both consumer expectations and legal requirements. On the consumer side, there is a demand for cars that are as economical as possible with lower fuel consumption, but providing also greater comfort and safety. These requirements are accompanied, from a legal point of view by more rigorous environmental regulations and requirements concerning the reduction of harmful emissions. Meeting these often-contradictory requirements is a growing challenge for car manufacturers and raw material suppliers, as well. Meeting the requirements in the most versatile way has resulted in tremendous progress over the last 40–50 years, both in the automotive industry and in the production and development of raw materials. The first part of this series of papers summarizes the main requirements in the automotive industry, as the main driving forces for material developments. Furthermore, the main types and properties of traditional high-strength steels, as well as the so-called first-generation Advanced High-Strength Steels will be introduced. In the second part, the main types and manufacturing processes of second generation advanced high-strength steels will be analyzed and some of the current steel developments will be presented through the results of the three generations of Advanced High-Strength Steels.

scholarly journals Biosurfactants – Nature's Solution for Today's Cleaning Challenges

2021 ◽  
Vol 75 (9) ◽  
pp. 752-756
Author(s):  
Jakob J. Mueller ◽  
Hans H. Wenk
Keyword(s):  
Large Scale ◽  
Raw Materials ◽  
Biological Molecules ◽  
Raw Material ◽  
Scale Production ◽  
Sustainable Solutions ◽  
Natural Substances ◽  
Head Groups ◽  
Large Scale Production ◽  
Recent Developments

Biosurfactants are surface-active molecules, developed by nature through evolution and naturally produced by different microorganisms. The most prominent examples are rhamnolipids and sophorolipids, molecules which contain hydrophilic sugar head groups and hydrophobic alkyl residues leading to an amphiphilic behavior with unique properties. Recent developments in the field of biotechnology enable the large-scale production of these biological molecules. The raw material basis is 100% renewable since sugars and oils are used as major raw materials. Additionally, biosurfactants are fully biodegradable, which allows the path back into the natural cycles. In comparison to established standard surfactants like SLES/SLS (sodium laureth (ether) sulfates) or betaines, rhamnolipids are much milder and, at the same time, show similar or even better performance in household or personal care applications. Foam behavior, solubilization and cleaning effectiveness are examples where these natural substances give excellent results compared to the synthetic benchmarks. The commercialization of biosurfactants at industrial scale now offers alternatives to consumers seeking sustainable solutions, without compromising performance. Biosurfactants combine both and set a new standard for surfactant applications.

scholarly journals Efficiency of Cassava Production in China: Empirical Analysis of Field Surveys from Six Provinces

2018 ◽  
Vol 8 (8) ◽  
pp. 1356 ◽  
Author(s):  
Hailing Fu ◽  
Yi Qu ◽  
Yi Pan
Keyword(s):  
Technical Efficiency ◽  
Large Scale ◽  
Production Efficiency ◽  
Raw Materials ◽  
Downstream Processing ◽  
Labor Cost ◽  
Raw Material ◽  
Labor Costs ◽  
Current Output ◽  
Cassava Production

Cassava is becoming increasingly important as an industrial raw material in China. However, an insufficient supply of cassava raw materials and the expanding demand for cassava in downstream-processing industries restricts the development of the cassava industry in China. This paper studies how to increase the scale of cassava planting and promoting cassava production efficiency using output-oriented Data Envelopment Analysis (DEA) modeling. Overall Technical Efficiency (OTE), Pure Technical Efficiency (PTE), and Scale Efficiencies (SE) of the cassava-production system in the major cassava production areas of China are calculated using Variable Returns to Scale (VRS). Results reveal that, in addition to the Guangdong province, the OTE of Guangxi, Hainan, Fujian, Yunnan, and Jiangxi is inefficient, with an OTE of less than 1. The largest cassava-planting province, Guangxi, has the lowest SE with 0.551. The PTE of Guangxi is close to the minimum with 0.344. The OTE of Guangxi is also the lowest among the five provinces with 0.190. This study also presents ways to improve production efficiency. Results reveal that Guangxi has a large ratio of transverse adjustment on average. In the Guangxi province, 1.70% of the service cost and 1.72% of the labor cost need to be eliminated to keep the current output scale. Meanwhile, service and labor costs need to be reduced by 3164.85 and 3209.92, respectively, to achieve the best production efficiency. Further industrialization and large-scale cassava cultivation, increased yield, and strengthened cooperation with the Association of South East Asian Nations (ASEAN) and Africa are suggested as policy options to improve the cassava system in China.

scholarly journals Diversification as a strategic direction for sustainable development of enterprises in the agricultural sector of the economy

2021 ◽  
Vol 2 (99) ◽  
pp. 326-336
Author(s):  
S. Sokolyuk ◽  
◽  
M. Koroteev ◽  
O. Zharun ◽  
O. Tupchiy ◽  
...  
Keyword(s):  
Large Scale ◽  
Agricultural Sector ◽  
Raw Materials ◽  
Environmental Safety ◽  
Financial Economic ◽  
Raw Material ◽  
Added Value ◽  
Industrial Processing ◽  
Agricultural Enterprises ◽  
Rational Combination

The diversification of the activities of agricultural enterprises is considered as a process of mastering the production of new or expanding the range of traditional types of products, which makes it possible to more fully realize the existing natural, biological, resource, production potential and helps to strengthen financial, economic and environmental safety, increases the competitiveness and efficiency of economic entities. Today, the need to diversify the activities of domestic agricultural enterprises is determined by a set of prerequisites, both general economic and specific. In modern realities, the overwhelming majority of farmers are focused on the production of the most liquid and least capital- and labor-intensive types of products with a short payback period. The economic results of agricultural enterprises in most cases directly depend on the efficiency of production of grain and oilseeds. Narrow specialization, and sometimes practically monoculture, increases the threats of agrobiological, ecological, and economic nature Diversification of their activities allows minimizing the risks of agricultural enterprises from unfavorable phenomena of agrotechnical and weather-climatic nature and unforeseen changes in market conditions. Optimization of the sectoral structure on the basis of a rational combination of the main, additional, and subsidiary industries ensures more efficient use of land and means of production, leads to the leveling of seasonality, and creates conditions for an enterprise to receive a guaranteed stable income. The priority for the diversification of large-scale agricultural production is its investment and innovative development with a rational combination of crop and livestock industries, the revival of the traditional for Ukraine industries of beet growing, vegetable growing, horticulture, cattle breeding, pig breeding, sheep breeding. Diversification of the activities of small and medium-sized producers provides for an orientation towards the production of products with a high level of labor intensity, environmentally friendly organic products, niche agriculture, the production of non-traditional agricultural products, green, agritourism, etc. The need to change the raw material nature of the agricultural sector of the Ukrainian economy determines the need to increase the industrial processing of agricultural raw materials. This will not only make it possible to obtain greater added value, but will also ensure the creation of additional jobs, will contribute to the growth of incomes of the population, and an increase in the revenues of budgets of all levels. The development of diversification processes guarantees a stable income and an increase in the profitability of agricultural producers and will also contribute to the implementation of national priorities for ensuring the country's food security, increasing employment, and solving social and material problems of peasants.

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