Venkatesa Prabhu S

Venkatesa Prabhu S
Addis Ababa Science and Technology University

Doctor of Engineering

About

156
Publications
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1,759
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Publications

Publications (156)
Article
Fouling in heat transfer units has a negative economic impact. Many scale‐forming impurities are present in cane molasses generated by sugar cane production technology, including cations of aluminum (Al), calcium (Ca), iron (Fe), magnesium (Mg), potassium (K), sodium (Na), as well as anions of carbonates, sulfites, phosphates, sulfate, silicates, a...
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In the present investigation, process parameters were optimized in order to enhance the reduction of calcium oxide (CaO) from sugarcane molasses using acid centrifugation treatment. To predict the effects of process factors on CaO reduction efficiency, a response surface approach with a central composite design was selected. The polynomial quadrati...
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The present study aimed to investigate the influence of incorporating cellulose nanocrystals in a polyvinyl alcohol (PVA) matrix to achieve the enhanced mechanical properties. Cellulose nanocrystals (CNC) were extracted from waste corncob through sulfuric acid hydrolysis. The maximized yield of CNC (41.8%) was observed at the parameters, 65 mass %,...
Article
In recent years, hybrid natural fiber–reinforced composites prepared by bio-based epoxy resin (BBER) have gained extensive usage due to their exceptional specific strength. Researchers have looked at natural fibre/BBER composites because of the vast array of technical uses for these materials. Experimenting with various composition combinations of...
Article
In polymer matrix composites (PMCs), reinforced lignocellulosic fibres are one of the excellent endeavours; doing so eliminates the need for the more commonplace synthetic fibres. In this respect, the fibres from Enset ventricosum (EV), one of the underutilized which have not been studied extensively, were focused to carry out an investigation on P...
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The increasing environmental impact of petroleum-based plastics has led to a growing interest in alternative bio-polymer-based plastics. This study is aimed at developing an edible film using extracted pectin from prickly pear peels. Ultrasonic-microwave-assisted extraction was optimized for maximizing pectin extraction. The optimal conditions were...
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This study examined the methods for preparing biocarbon from Teff hay (TBC) and thiol-grafted seed gum of Tamarindus indica (TH@TI-TBC) with the purpose of removing cadmium (Cd) from polluted electroplating waste water. To improve biocarbon adsorption, seed gum and thiol were added in a two-step combination. At a pH of 5.5, the most effective Cd ad...
Chapter
Multidimensional Nanomaterials for Supercapacitors: Next Generation Energy Storage explores the cutting-edge advancements in multidimensional nanomaterials for supercapacitor applications, addressing key techniques, challenges, and future prospects in the field. The book offers a comprehensive overview of the fundamentals of supercapacitors, includ...
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To segregate the Titanium (Ti) from the reinforcements of the molten scrap of Titanium/Aluminum (Ti/Al) composite, application of ultrasonic vibration is known to be one of the sound techniques. Various studies have been looked at the effect of ultrasonic vibration on the melting process, however not much have been investigated with respect to the...
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An appropriate exploitation of biosorbents for the adsorptive removal of toxic heavy metal ions has gained huge interest among the researchers due to concerns on adverse impact by chemical methods and its generation of harmful sludge as byproduct. In the present study, the efficacy of a grafted biosorbent prepared using Tamarindus indica seed gum w...
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This study aimed to examine the mechanical and physical characteristics of hybrid composite prepared using bio-epoxy reinforced with natural fibers extracted from pineapple leaf (PLF) and sisal (SF). The hand lay-up technique was utilized to fabricate the hybridized composite from bi-directional pineapple leaf fiber and sisal fibers using various s...
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Injera is a staple food in Ethiopian dine. This study aimed to investigate on leftover injera (LI) for producing biogas via anaerobic digestion (AD), while leftover injera is full of easily biodegradable components. Aiming to examine the impact of yeast addition on biogas production efficiency, it was found that the addition of 2 % volatile solids...
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The different pH-varied bismuth vanadate nanorods have been synthesized through a solvothermal method and utilized for XRD, HRTEM, SEM and electrochemical studies. The XRD spectra of BV-5 and BV-7 samples show the monoclinic structure. Both electrodes show rod-like morphology. Also, when the pH 7 the bismuth oxide shows large size nanorods compared...
Chapter
Chicken feathers (CF) are a significant type of residual waste produced by the meat processing industry. Prolonged accumulation of such a leftover CF could be a serious problem for solid waste management. Consequently, CF can be exploited for widespread production of keratinaceous around the world that calls for their justifiable use. CF mostly con...
Article
Teff ( Eragrostis tef ) is known as a staple grain crop which grown as edible seeds, remarkably in Ethiopia. However, after removal of its seeds, the hay obtained from this crop, are considered as agro-waste. Such a lignocellulosic agro-waste can be potentially exploited to prepare activated carbon to treat the harmful industrial effluents for deto...
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Teff straw ash was first converted into sodium silicate solution, then processed via sol-gel, producing low-density silica aerogel (modified silica gel). A one-step modification method was applied to produce modified silica gel from teff straw ash. The method involved the use of trimethylchlorosilane (TMCS), ethanol, and n-hexane as reagents, wi...
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The study was focused on preparing activated carbon from one of the predominant agro-wastes, teff straw (TS), through chemical activation and investigating the optimum process condition for removing the reactive yellow 145 dye (RY 145) from simulated textile effluent and chemical oxygen demand (COD) from textile industry effluent. The prepared acti...
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Considering natural compounds for the antiviral effect is another opportunity for exploring novel drug candidates for severe acute respiratory syndrome coronavirus 2. The selected natural compounds were interacted using a molecular docking approach. The 3D structures of the main protease and papain-like protease were used for the virtual screening...
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To develop high quality cookies, even seemingly smallest changes depended on factors that can affect taste, texture, and nutritional value. In this light, this study aimed to investigate the upshot of refined wheat flour and pumpkin seed flour on properties of cookies such as antioxidant activity, thermal and oxidative stability. In view of the for...
Chapter
Hexavalent chromium [Cr(VI)] is one of the toxic pollutants that creates a serious environmental issue. If Cr(VI) has been persisted to long period, healthy nature of the environment badly effects and makes a deadly impact to the living organisms. Due to extensive use of chromium related compounds by different industries are most responsible for su...
Chapter
Presently in developing countries, solid waste management is one of the crucial challenges since the need to use eco-friendly techniques appropriately increases alarmingly. Technological development, intensification, and urbanization of smart agriculture procedures have drastically accelerated waste generation from post-agricultural processes in re...
Chapter
Biochar is produced from the lignocellulosic biomass by pyrolyzing at the temperature range of 550–850 K. Usually, wood residues and agricultural residues are the key feedstocks for biochar production. In recent years, several researchers have focused on biochar preparations toward enhancing physiochemical properties, such as pore volume, specific...
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Valorizing the production of massive amounts of agricultural waste into valuable products is an immediate concern for environmental protection and bioeconomy advancement. Recently, agricultural waste has become a popular raw material for bioethanol production could reduce environmental pollution and strengthen the local circular bioeconomy. Its pre...
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Bio-based silica gel has many commercial significances in various sectors, such as medical, cleansing agents in industries, laboratory analysis, cosmetics, food additives, and so forth. In view of crucial requirements, this study aimed to synthesize and characterize the silica gel from Ethiopia’s primary post-harvest biomass residue, known as teff...
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Chromium (VI) is known to be harmful element that commonly found industrial waste, mining activities, and wastewater discharges from various industries. When released into the environment, Cr (VI) can contaminate soil, water, and air, posing a serious threat to living organisms. Aiming to Cr decontamination, this work was framed to isolate the fung...
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Pollution from many different sources severely affects the quality of our water supply. Over the past few years, a large number of online water quality monitoring stations have been used to gather time series data on water quality monitoring. These numbers are the foundation for deep learning techniques for forecasting water quality. In particular,...
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The production of avocados for commercial purposes is on the rise; however, with this comes an increase in the amount of seed waste that is usually thrown away. One such byproduct of avocado fruit processing is the starch-rich avocado seeds that can be used to extract the starch. Starch is a functional component utilized in the food business to hel...
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The objective of this research was to extract and characterize the pectin from the fruit peels of Ethiopian prickly pears (EPP) (Opuntia ficus-indica) using microwave assisted method. Solution pH and microwave potential were optimized using different pH values (1, 3, and 4) and power (300, 400, and 500 W), respectively, to extract ameliorated pecti...
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Gesho ( Rhamnus prinoides ) is a medicinal plant with antioxidant and anti-inflammatory activities commonly used in the ethnomedicinal systems of Africa. Using a three-layer neural network, four culture conditions viz., concentration of agar, duration of light exposure, temperature of culture, and relative humidity were used to calculate the callus...
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This study aimed to investigate the improvisation of physico-chemical, functional, and structural properties of Enset (Ensete ventricosum) starch, which is one of the staple foods in Ethiopia. To acquire the improvised properties of starch, freeze-drying technique assisted by alcoholic–alkaline treatment was carried out. In this regard, the respons...
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Undeniably, concrete cracks if not healed on time could cause various durability issues, resulting in high-cost crack repairing strategy. Recently, due to several environmental concerns, bio-based construction materials gained much attention among researchers. In this context, bacterial precipitation of calcium carbonate can be effectively exploite...
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In the present study, a hybrid cotton fabric with an enhanced ultraviolet (UV) shielding property was developed by coating with functionally activated nanocarbon (FACN) which was grafted by polyaniline (PANI) using in situ polymerization. In light of this, Teff hay biomass was used to establish the activated nanocarbon (ANC), that was subsequently...
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Canals are a very imperative source of irrigation for the agricultural sector in India. Seepage causes major water loss in canals, and hence, the installation of liners becomes necessary. Compacted clay soils are commonly used as liners in the canals. This structure will most probably be subjected to salinization and desalinization cycles throughou...
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Beta vulgaris subsp. vulgaris (red Swiss chard) leaf stalks offer a rich source of betalains, natural pigments with promising applications in the food industry. This study employed response surface methodology (RSM) in conjunction with a 3-level Box-Behnken design to optimize independent extraction variables, including temperature, extraction time,...
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In vitro, sterilization is one of the key components for proceeding with plant tissue cultures. Since the effectiveness of sterilization has a direct impact on the culture's final outcomes, there is a crucial need for optimization of the sterilization process. However, compared with traditional optimizing methods, the use of computational approache...
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The aim of this work was to synthesize silver nanoparticles (AgNPs) using trisodium citrate and extract obtained from Vernonia amygdalina plant leaves as a chemical and biological reducing agent, respectively, and to investigate the impact of different experimental conditions on the stability and particle size of the acquired nanoparticles. Particl...
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Utilization of biomass is important both for economic and environmental projection purposes. To use biomass for industrial applications as well as to reduce its pollution load on environment, it is important to characterize and determine the compositions of the biomass. In this work, the proximate and chemical analyses of straws of four (Dagim, Fil...
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Due to the depletion of ozone atmosphere, there is a progressive increase in impact of ultraviolet (UV) radiation on human skin. The continual exposure of UV radiation results in serious adverse effects, such as photodermatosis, abnormal skin aging, erythema and skin cancer. Present study aimed to develop an improved UV resisting cotton fabric usin...
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The generation of sewage wastewater is unavoidable due to the continual increase in the global population that paves the way to appropriate disposal management. Sewage wastewater treatment and consequent generation of sewage sludge (SS) are well connected with global environmental issues. Upon risk assessment on different SS disposal methods, conve...
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Innovation has been made in the caisson foundation to support a very large structure resting over a soft soil stratum known as the root-caisson foundation. Tis technique was executed in China-Yangtze River Bridge. Te root caisson foundation was frst implemented in the Yangtze River bridge and discovered that the root improves soil structure interac...
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Silica has shown numerous applications in different fields such as environmental, biomedical, agriculture, and even in chemical processing. However, due to high energy-intensive and cost-effective issues, researchers show interest to replace the conventional methods with biobased environmentally-friendly techniques for biosilica production from ren...
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The effects of the percentage volume of reinforcement, the ratio of reinforcement, and the matrix size of particles on the wear behavior of AA5052/B4C metal matrix composites (MMCs) examine. This research examines a model function developed from an artificial neural network (ANN). AA5052/B4C composites bent using a powder metallurgy technique to ha...
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The major goal of this investigation was to prepare a drug delivery of polymeric nanoparticles (NPs) from 5-fluorouracil (FU) that could be delivered intravenously and improve the therapeutic index of the FU. In order to achieve this, interfacial deposition method was used to prepare FU entrapped poly-(lactic-co-glycolic acid) nanoparticles (FU-PLG...
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This study aimed to optimize the preparation condition of activated carbon using Teff straw as a precursor material via evaluating its potential in terms of maximizing the adsorptive removal of Reactive Yellow 145 dye (RY 145) from aqueous solutions. Selective factors, such as activation time, activation temperature, and impregnation ratio on the p...
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In this work, raw bean seed husk (RBH) and sulfuric acid-treated bean seed husk were examined for adsorption of sodium ions from water. Treated bean seed husk at various time and acid concentration was refined by performance test on sodium removal by using salt solution of 1643 mg/L and solid to liquid ratio of 12.5 (g:L). Maximum removal of 27.8%...
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Currently, international development requires innovative solutions to address imminent challenges like climate change, unsustainable food system, food waste, energy crisis, and environmental degradation. All the same, addressing these concerns with conventional technologies is time-consuming, causes harmful environmental impacts, and is not cost -e...
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The present study aimed to optimize the process on the yield percentage of biodiesel from Argemone mexicana oil using calcium oxide as catalyst derived from chicken eggshells. The catalyst was characterized by different techniques, such as X-ray diffraction analysis, Brunauer-Emmett-Teller method with the Barret-Joyner-Halenda model, Fourier transf...
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Vermicomposting uses less energy and requires fewer infrastructures, and it is capable of restoring soil nutrition and carbon. Banana cultivation produces lots of trash in a single crop season, with 30 tonnes of waste generated per acre. The biodegradable fraction of banana leaf waste is thrown out in large quantities from temples, markets place we...
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Hydrothermal liquefaction (HTL) is identified as a promising thermochemical technique to recover biofuels and bioenergy from waste biomass containing low energy and high moisture content. The wastewater generated during the HTL process (HTWW) are rich in nutrients and organics. The release of the nutrients and organics enriched HTWW would not only...
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This study used a simple solution evaporation approach to make a bioinorganic titanium dioxide (Bi-TiO2) photocatalyst for dye contaminant degradation. A variety of techniques, including X-ray diffraction (XRD), Fourier-transform infrared (FT-IR) spectroscopy, scanning electron microscopy (SEM) coupled with energy dispersive X-ray analysis (EDAX),...
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Tetracycline, a broad-spectrum antibiotic, is a widely used pharmaceutical agent for treating common infections in humans and animals. Because of its indiscriminate overuse, tetracycline remains one of the most persistent micro-pollutants in the environment. This study explored magnetized cotton dust biochar (MCDB) and magnetized cotton dust (MCD)...
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Concrete’s binder can be substituted with rice husk ash, metakaolin, kaolin clay, GGBS, and other agricultural and industrial byproducts and waste materials, which lowers greenhouse gas emissions, namely carbon dioxide (CO2). When employed in the manufacturing of concrete, the aforementioned items reduce the amount of water required and have no dis...
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Bone-conducted microphone (BCM) senses vibrations from bones in the skull during speech to electrical audio signal. When transmitting speech signals, bone-conduction microphones (BCMs) capture speech signals based on the vibrations of the speaker’s skull and have better noise-resistance capabilities than standard air-conduction microphones (ACMs)....