scholarly journals Modeling of thermochemical conversion of waste biomass – a comprehensive review

2021 ◽  
Vol 8 (4) ◽  
pp. 1481-1528
Author(s):  
Sinhara M.H.D. Perera ◽  
Chathuranga Wickramasinghe ◽  
B.K.T. Samarasiri ◽  
Mahinsasa Narayana
Keyword(s):  
Value Added ◽  
Simulation Models ◽  
Point Of View ◽  
Thermochemical Conversion ◽  
Waste Biomass ◽  
Biochemical Processes ◽  
Thermochemical Processes ◽  
Simplifying Assumptions ◽  
Research Gap ◽  
Value Added Products

Thermochemical processes, which include pyrolysis, torrefaction, gasification, combustion, and hydrothermal conversions, are perceived to be more efficient in converting waste biomass to energy and value-added products than biochemical processes. From the chemical point of view, thermochemical processes are highly complex and sensitive to numerous physicochemical properties, thus making reactor and process modeling more challenging. Nevertheless, the successful commercialization of these processes is contingent upon optimized reactor and process designs, which can be effectively achieved via modeling and simulation. Models of various scales with numerous simplifying assumptions have been developed for specific applications of thermochemical conversion of waste biomass. However, there is a research gap that needs to be explored to elaborate the scale of applicability, limitations, accuracy, validity, and special features of each model. This review study investigates all above mentioned important aspects and features of the existing models for all established industrial thermochemical conversion processes with emphasis on waste biomass, thus addressing the research gap mentioned above and presenting commercial-scale applicability in terms of reactor designing, process control and optimization, and potential ways to upgrade existing models for higher accuracy.

Current advances on waste biomass transformation into value-added products

2020 ◽  
Vol 104 (11) ◽  
pp. 4757-4770 ◽  
Author(s):  
Wubliker Dessie ◽  
Xiaofang Luo ◽  
Meifeng Wang ◽  
Luya Feng ◽  
Yunhui Liao ◽  
...  
Keyword(s):  
Value Added ◽  
Waste Biomass ◽  
Biomass Transformation ◽  
Value Added Products

scholarly journals Characteristics identifying the companies conducting different dividend policy: evidence from Poland

Equilibrium ◽  
2020 ◽  
Vol 15 (1) ◽  
pp. 63-85
Author(s):  
Aleksandra Pieloch-Babiarz
Keyword(s):  
Stock Market ◽  
Dividend Policy ◽  
Stock Exchange ◽  
Value Added ◽  
Holistic Approach ◽  
Point Of View ◽  
Capital Growth ◽  
Different Types ◽  
Warsaw Stock Exchange ◽  
Research Gap

Research background: Dividend policy has been a subject of many scientific studies. Although most of them focus on its determinants, there is still a research gap concerning the lack of comprehensive research on the differences between companies implementing different types of dividend policy. Furthermore, no at-tempt has been made to indicate which of them could be considered as more attractive for stock market investor that invests in dividend stocks. Purpose of the article: The aim of this paper is to carry out a comparative analysis of companies with different dividend policy from the point of view of their investment attractiveness. Methods: The empirical research is conducted among the regular dividend payers listed on the main market of the Warsaw Stock Exchange in years 2001–2017. The data for analysis is collected from Notoria Service and Stock Market Yearbooks. The main calculations are carried out using the technique for order of preference by similarity to ideal solution (TOPSIS), descriptive statistics and one-way analysis of variance ANOVA with Fisher’s LSD test. Findings & Value added: The value added of this paper is a holistic approach to comparison of companies conducting different dividend policy. The most significant differences are observed in case of extreme and residual dividend policy. The first policy should be of particular interest to investors investing for dividends, while the second one should be attractive to investors that invest for capital growth. The research is valuable due to the lack of academic studies concerning different dividend policy in the context of attractiveness of investing in dividend shares.

scholarly journals Integrated Biotechnology Management of Biosolids: Sustainable Ways to Produce Value—Added Products

2021 ◽  
Vol 3 ◽  
Author(s):  
Vasanth Kumar Vaithyanathan ◽  
Hubert Cabana
Keyword(s):  
Wastewater Treatment ◽  
Solid Waste ◽  
Dry Matter ◽  
Municipal Wastewater ◽  
Value Added ◽  
Resource Recovery ◽  
Wastewater Sludge ◽  
Waste Biomass ◽  
Worldwide Production ◽  
Value Added Products

Biosolids (BS) are organic dry matter produced from wastewater treatment plants (WWTPs). The current yearly worldwide production of BS is estimated to be around 100–125 million tons and is expected to continuously increase to around 150–200 million tons by 2025. Wastewater treatment industries across the globe strive to achieve a green and sustainable manufacturing base for the management of enormous amounts of municipal BS, which are rich in nutrients and organic dry matter along with contaminants. The management of these organic-rich wastes through environmentally friendly recovery technologies is a major challenge. The need to improve waste biomass disposal by biological development and develop more economically viable processes has led to a focus on the transformation of waste resources into value-added products (VAP). This paper assesses the leading disposal methods (based on volume and contaminant reduction) and reviews the state of biotechnological processes for VAP recovery from municipal wastewater sludge (untreated solid waste residual) and BS (stabilized solid waste which meets criteria for its use in land). A review of the anaerobic and aerobic digestion processes is presented to provide a holistic overview of this growing research field. Furthermore, the paper also sheds light on the pollutant reduction and resource recovery approaches for enzymes, bioflocculants, bioplastics, biopesticides, and biogas as a mean to represent BS as a potential opportunity for WWTPs. However, only a few technologies have been implemented for VAP resource recovery and a shift from WWTPs to waste resource recovery facilities is still far from being achieved.

scholarly journals Risk Management Under Impacts of Macro Economic Factors Ina Big Seafood Ex-Import Firm -Angiang Fisheries Ex-Import Jsc. In Vietnam

Management ◽  
2021 ◽  
Vol 25 (1) ◽  
pp. 172-185
Author(s):  
Nguyen Ngoc Thach ◽  
Dinh Tran Ngoc Huy
Keyword(s):  
Stock Price ◽  
Factor Model ◽  
Value Added ◽  
Joint Stock Company ◽  
Research Model ◽  
Stock Company ◽  
The Us ◽  
Research Gap ◽  
Seafood Processing ◽  
Value Added Products

Summary AnGiang Fisheries Ex-Import Joint Stock Company (AGF) was established in 2001. Agifish has traditionally beena leader in the fields of production and business activities, scientific research in the field of fingerling production, seafood processing technology and the development of value added products processed from Basa fish, tra fish. Agifish cares about buildinga spirit of solidarity between leaders, managers and workers striving for the development of the Company. Because we figure out there isa research gap in which many previous studies forgot to explore both internal and external macroeconomic elements and their impacts on stock price of Agifish (AGF),a big Vietnam fisheries firm, in the context Viet Nam and the US economies receive impacts from global economic crisis. With the using of quantitative analysis and statistics, regression OLS, together with qualitative methods including synthesis, comparison and explanatory methods, authors recognize that, ina six factor model, AGF stock price goes up together with effects from increase in GDP growth and lending rate declines. Last but not least, our research model can be expanded to other markets.

scholarly journals Strength Parameters of Paver Blocks By Incorporating Used Foundry Sand

2019 ◽  
Vol 9 (2) ◽  
pp. 4705-4711
Keyword(s):  
Manufacturing Industry ◽  
Environmental Problem ◽  
Waste Product ◽  
Value Added ◽  
Point Of View ◽  
Strength Parameters ◽  
Foundry Sand ◽  
Waste Products ◽  
New Methodologies ◽  
Value Added Products

All over the world the handling and disposal of waste products from the manufacturing industry are of big concern these days. In this context, the volume of used foundry sand is such that the disposal creates a big environmental problem for all the countries where the foundry industries are in abundance. New methodologies should be employed to utilize the used foundry sand in making value-added products in a commercial manner to keep the environment free from the potential adverse effects of the accumulation of this waste product. This research is an attempt to put forward the idea of utilizing the used foundry sand in commercial production of value-added products like paver blocks from a techno-economical point of view. This will be beneficial to the ecological and environmental systems for sustainable development progressing towards a greener world.

scholarly journals Potential assessment of eucalyptus grown for biorefinery processes

2017 ◽  
Vol 3 (1) ◽  
pp. 1
Author(s):  
Paulo Eichler ◽  
Marcilio Toledo ◽  
Matheus Vilares ◽  
Fernando Gomes ◽  
Rogério Lourega ◽  
...  
Keyword(s):  
Raw Materials ◽  
Value Added ◽  
Operating Conditions ◽  
Cellulose Content ◽  
Efficient Utilization ◽  
High Chemical ◽  
Heating Value ◽  
Chemical Complexity ◽  
Thermochemical Processes ◽  
Value Added Products

With the predictability of oil shortage, there is a strong demand for renewable and sustainable raw materials. In this scenario, lignocellulosic material stands out as a potential solution. With the use of bio-refinery, they can be processed into high value added products through chemical, biochemical and thermochemical processes. A great source of lignocellulosic biomass today is the wood of Eucalyptus, which has high levels of production and productivity in Brazil, reaching numbers between 60-80 m3ha1year-1. In order to achieve a more efficient utilization of biomass in a biorefinery concept, it is necessary first to perform chemical analyses to define the operating conditions of the conversion processes, since heterogeneity and high chemical complexity is an inherent property of the biomass. In this context, this study aimed to chemically characterize and investigate the potential of three species of Eucalyptus (E. urophylla, E. saligna and E. dunnii) grown in Rio Grande do Sul state for biorefinery purposes. Results of higher heating value for E. urophylla, E. saligna and E.dunnii were similar (19.10, 19.10 and 19.15 MJ/kg respectively). However, cellulose content results for E. saligna (47.5%±2.40) were highlighted, being slightly higher thanthose for E. urophylla (42.75%±1.34) and E. dunnii (43.10%±1.13). Hemicelluloses content for E. urophylla (23.25%±0.78) was slightly superior to the others (20.35%±2.05 for E. saligna and 18.80%±2.40 for E. dunnii). Finally, it was concluded that the analysed species of Eucalyptus have high potential for biorefinery in thermochemical processes. The species E. urophylla has the greatest potential for biorefinery processes using hemicelluloses, and the species E. saligna has greater potential for biorefinery processes utilizing cellulose.

scholarly journals Engineered Microbes for Pigment Production Using Waste Biomass

2020 ◽  
Vol 21 (2) ◽  
pp. 80-95 ◽  
Author(s):  
Zeba Usmani ◽  
Minaxi Sharma ◽  
Surya Sudheer ◽  
Vijai K. Gupta ◽  
Rajeev Bhat
Keyword(s):  
Food Waste ◽  
Organic Waste ◽  
Value Added ◽  
Natural Antioxidants ◽  
Bioactive Molecules ◽  
Waste Biomass ◽  
Microbial Systems ◽  
By Products ◽  
Made In ◽  
Value Added Products

Agri-food waste biomass is the most abundant organic waste and has high valorisation potential for sustainable bioproducts development. These wastes are not only recyclable in nature but are also rich sources of bioactive carbohydrates, peptides, pigments, polyphenols, vitamins, natural antioxidants, etc. Bioconversion of agri-food waste to value-added products is very important towards zero waste and circular economy concepts. To reduce the environmental burden, food researchers are seeking strategies to utilize this waste for microbial pigments production and further biotechnological exploitation in functional foods or value-added products. Microbes are valuable sources for a range of bioactive molecules, including microbial pigments production through fermentation and/or utilisation of waste. Here, we have reviewed some of the recent advancements made in important bioengineering technologies to develop engineered microbial systems for enhanced pigments production using agrifood wastes biomass/by-products as substrates in a sustainable way.

Sign in / Sign up

Export Citation Format

Share Document