Waste biomass valorization for the production of biofuels and value-added products: a comprehensive review of thermochemical, biological and integrated processes

2021 ◽  
Author(s):  
Jude A. Okolie ◽  
Emmanuel I. Epelle ◽  
Meshach E. Tabat ◽  
Uzezi Orivri ◽  
Andrew Nosakhare Amenaghawon ◽  
...  
Keyword(s):  
Value Added ◽  
Waste Biomass ◽  
Biomass Valorization ◽  
Comprehensive Review ◽  
Integrated Processes ◽  
Value Added Products

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

Electrocatalysis for CO2 conversion: from fundamentals to value-added products

2021 ◽  
Author(s):  
Genxiang Wang ◽  
Junxiang Chen ◽  
Yichun Ding ◽  
Pingwei Cai ◽  
Luocai Yi ◽  
...  
Keyword(s):  
Value Added ◽  
Co2 Conversion ◽  
Comprehensive Review ◽  
Value Added Products

This timely and comprehensive review mainly summarizes advances in heterogeneous electroreduction of CO2: from fundamentals to value-added products.

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 Recent advances in the valorization of plant biomass

2021 ◽  
Vol 14 (1) ◽  
Author(s):  
Peng Ning ◽  
Guofeng Yang ◽  
Lihong Hu ◽  
Jingxin Sun ◽  
Lina Shi ◽  
...  
Keyword(s):  
Industrial Application ◽  
Plant Biomass ◽  
Value Added ◽  
Renewable Resource ◽  
Advanced Materials ◽  
Biomass Valorization ◽  
Treatment Technologies ◽  
Processing Techniques ◽  
Different Sources ◽  
Value Added Products

AbstractPlant biomass is a highly abundant renewable resource that can be converted into several types of high-value-added products, including chemicals, biofuels and advanced materials. In the last few decades, an increasing number of biomass species and processing techniques have been developed to enhance the application of plant biomass followed by the industrial application of some of the products, during which varied technologies have been successfully developed. In this review, we summarize the different sources of plant biomass, the evolving technologies for treating it, and the various products derived from plant biomass. Moreover, the challenges inherent in the valorization of plant biomass used in high-value-added products are also discussed. Overall, with the increased use of plant biomass, the development of treatment technologies, and the solution of the challenges raised during plant biomass valorization, the value-added products derived from plant biomass will become greater in number and more valuable.

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.

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.

scholarly journals Microwave Drying of Banana (Musa acuminata) Stalk Biomass before Conversion to Value-added Products

2021 ◽  
Vol 6 (1) ◽  
Author(s):  
O. O. Agbede
Keyword(s):  
Activation Energy ◽  
Value Added ◽  
Microwave Drying ◽  
Waste Biomass ◽  
Drying Time ◽  
Effective Moisture ◽  
Thin Layer Drying ◽  
Drying Rates ◽  
Kinetics Of ◽  
Value Added Products

Banana stalk biomass can pose disposal, environmental and health challenges. Fortunately, this biomass can be converted to value-added products including biofuels, bioenergy, biosorbents, fibers and animal feeds. However, it is necessary to remove moisture from the fresh biomass by drying before storage and conversion processes. Conventional drying in open sun is slow and weather dependent, but higher heating rates and faster drying rates can be achieved in a microwave dryer. Hence, the microwave drying characteristic of banana stalk biomass was investigated. Banana stalks were sliced into 5 mm thick pieces and dried in a microwave oven at power levels of 400 – 1000 W, the stalk slices were weighed at interval until the mass remained constant. The effective moisture diffusivity, activation energy and energy required for drying were determined. The microwave drying data were also fitted to twelve thin layer drying mathematical models to describe the kinetics of the drying process. The drying time of banana stalk slices decreased with increasing microwave power. The drying occurred mainly in the falling rate period. The effective moisture diffusivities were 4.14 × 10-9 – 2.00 × 10-8 m2 s-1 at 400 – 1000 W. The activation energy was 122 W g-1 while the total and specific energies required for the microwave drying were 0.25 – 0.37 kWh and 34.8 – 51 kWh/kg, respectively. The Weibull model suitably described the microwave drying kinetics of banana stalk slices. The moisture present in fresh banana stalk waste biomass can be effectively and rapidly removed by microwave drying before conversion processes.

Bioconversion of marine waste biomass for biofuel and value-added products recovery

2020 ◽  
pp. 481-507
Author(s):  
A. Parvathy Eswari ◽  
R. Anu Alias Meena ◽  
R. Yukesh Kannah ◽  
G. Sakthinathan ◽  
O.P. Karthikeyan ◽  
...  
Keyword(s):  
Value Added ◽  
Waste Biomass ◽  
Marine Waste ◽  
Value Added Products
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