Other affiliations: Masdar Institute of Science and Technology, University of Surrey, Central University, India ...read more
Bio: Tasneem Abbasi is an academic researcher from Pondicherry University. The author has contributed to research in topic(s): Vermicompost & Biogas. The author has an hindex of 38, co-authored 142 publication(s) receiving 5128 citation(s). Previous affiliations of Tasneem Abbasi include Masdar Institute of Science and Technology & University of Surrey.
01 Jan 2022
Abstract: The two free-floating aquatic weeds—salvinia (Salvinia molesta) and water hyacinth (Eichhornia crassipes) —feature among the world’s 100 most invasive plants and animals. Both occur widely in India as also in most other countries of the tropical and sub-tropical region. In this brief review the attributes of the two weeds, with special reference to their role in phytoremediation, are presented.
••01 Jan 2022
••01 Jan 2022
Abstract: A brief state-of-the-art review is presented on vermicompost tea which is an emerging organic fertilizer-cum-pest repellant. Its methods of preparation and its effects on the germination, growth, yield, and suppression of plant pathogens have been surveyed.
••01 Jan 2022
Abstract: Earthworms are among the three classes of organisms which contribute more than any other class in tilling and fertilizing soil in nature—ants and termites being the other two. In nature, earthworms feed upon plant debris and animal dropping to produce vermicast which is an excellent organic fertilizer. But during rains and through small streams ‘vermiwash’ (VW) is also generated which is an extract of not only earthworm-worked biomass but also the earthworm body fluids. In recent years, procedures have been developed to generate VW under controlled conditions and its fertilizer value has been assessed. This chapter presents a state-of-the-art assessment of the virtues and the potential of VW.
Abstract: In the context of the absence of any prior art on the vermicomposting of any xerophyte—presumably because xerophytes, in general, are structurally tough and have attributes which help them resist biodegradation—the present work has been undertaken. It has led to a procedure which makes even the highly toxic leaves of prosopis amenable to vermicomposting. Two years long and continuous operation of vermireactors with six different species of earthworms, has shown that the earthworms gradually adapted to prosopis as their exclusive feed, showing a consistently increasing rate of vermicast production while remaining healthy and displaying good fecundity throughout. The work provides an avenue of utilizing prosopis leaves which are generated in very large quantities across the tropical and sub-tropical world. At present no process exists which can make use of prosopis leaves even as the wood of its trees is utilizable. Besides valorizing an otherwise wasted phytomass the present work will also prevent falling of prosopis leaves on soil and their very slow biodegradation during which they toxify the soil with allelochemicals and emit global warming gases.
Abstract: The demand for the green synthesis of nanoparticles has gained prominence over the conventional chemical and physical syntheses, which often entails toxic chemicals, energy consumption and ultimately lead to negative environmental impact. In the green synthesis approach, naturally available bio-compounds found in plants and fungi can be effective and have been proven to be alternative reducing agents. Fungi or mushrooms are particularly interesting due to their high content of bioactive compounds, which can serve as excellent reducing agents in the synthesis of nanoparticles. Apart from the economic and environmental benefits, such as ease of availability, low synthesis/production cost, safe and no toxicity, the nanoparticles synthesized from this green method have unique physical and chemical properties. Stabilisation of the nanoparticles in an aqueous solution is exceedingly high, even after prolonged storage with unperturbed size uniformity. Biological properties were significantly improved with higher biocompatibility, anti-microbial, anti-oxidant and anti-cancer properties. These remarkable properties allow further exploration in their applications both in the medical and agricultural fields. This review aims to explore the mushroom-mediated biosynthesis of nanomaterials, specifically the mechanism and bio-compounds involved in the synthesis and their interactions for the stabilisation of nanoparticles. Various metal and non-metal nanoparticles have been discussed along with their synthesis techniques and parameters, making them ideal for specific industrial, agricultural, and medical applications. Only recent developments have been explored in this review.
Abstract: Olive mill wastewater is the main by-product derived from olive mills using the three-phase extraction process, displaying a serious environmental risk due to its notable content in organics and phenolics. This work focused on a high-rate thermophilic anaerobic digester development, able to remove high organic load amounts, by converting it to biogas. The proposed system is an upflow packed bed reactor with recycling stream and biomass carriers appropriate for inoculum colonization. An anaerobic inoculum was acclimatized under thermophilic conditions and subsequently added into the reactor. Its performance examination against twice-centrifuged olive mill wastewater of 40 g COD/L followed, testing several runs of gradually decreased hydraulic retention time, reaching steady-state conditions until the minimum of 4.2 days, while optimum performance was achieved at 5.6 days. The production of 9.51 ± 0.37 NLCH4/LFeed is considered quite promising for the high-rate anaerobic treatment plants development for olive mill wastewater valorization, without the need of co-digestion.
TL;DR: The drivetrain identification problem of a horizontal axis gear-driven wind turbine has been considered and the drivetrain model of the wind turbine is obtained but the aerodynamic torque in the real performance of theWind turbine is still unknown.
Abstract: In this paper, the drivetrain identification problem of a horizontal axis gear-driven wind turbine has been considered. The identification problem leads to a precise model of the drivetrain of the wind turbines which plays a key role in the production and transmission of electrical energy. This process consists of two stages: First, offline identification which needs the input–output data from the drivetrain system. These data are obtained from the FAST code. FAST (Fatigue, Aerodynamics, Structures, and Turbulence) is a valid aeroelastic code in the simulation aeroelastic field of offshore and onshore wind turbines. In region 2 (wind velocity is between the cut-in and rated velocities), the generator torque is input, and rotor speed is output. It is supposed that the wind velocity is neglected in the identification process (the identification process is not considered in the presence of wind or done in the low wind velocities bellower than the cut-in wind velocity). In the second stage, after completion of the offline identification process, the drivetrain model of the wind turbine is obtained but the aerodynamic torque in the real performance of the wind turbine is still unknown. In this stage, to estimate the aerodynamic torque, high order sliding mode estimator is used and the unknown states are estimated by using the Extended Kalman Filter (EKF)
Abstract: Renewable energy has become increasingly popular in the recent times as countries have shifted focus towards carbon-neutral and environmentally sustainable sources of energy. Biogas and biomethane derived energy from Anaerobic Digestion of organic waste have proved to be excellent alternative to fossil-fuel based energy. Many countries around the world are actively adopting biomethane as an alternative to petrol/diesel or use biogas to provide energy for the domestic sector through combined heat and power plants. The contribution of anaerobic digestion in the Irish energy sector remains quite low as compared to its European union counterparts due to related legislation and lack of government incentives. Nevertheless, Ireland is rich in biomass with a huge potential for developing its renewable energy sector from anaerobic digestion of agricultural waste, which is relatively inexpensive and available here in abundance. Chicken litter is one such waste which offers a variety of environmental benefits as anaerobic digestion feedstock. In comparison to cow manure and pig manure, chicken litter was relatively unpopular in anaerobic digestion due to its high nitrogen and lignocellulose content. Further, the global production of chicken manure has been increasing constantly thus making its disposal challenging across the world. However, researchers have identified many optimisation strategies to overcome these issues and demonstrated the advantages of using chicken litter in anaerobic digestion including odor reduction, greenhouse gas mitigation, production of gaseous biofuel, avoiding eutrophication of water bodies and significantly improving global production of renewable energy to help countries reduce their carbon emissions.
Abstract: In industries related to fossil energy, coal dust is often deposited at an angled position. A two–step parallel coal dust oxidation reaction mechanism is used to study the self–ignition and combustion characteristics of coal dust under inclination conditions. The consumption and transfer of multiple substances are considered. In addition, the gravity direction is used to simulate the influence of the inclination conditions on ignition characteristics of coal dust. Firstly, the reliability of the numerical model is verified, and the time series characteristics of the self–ignition and combustion of coal dust are studied. Then the characteristic parameters and evolution of self–ignition and combustion under different inclination are analyzed. The results show that under hot plate conditions, the ignition and combustion process of coal dust can be divided into five stages. The minimum ignition temperature of the coal dust layer (MITL) changes sinusoidally with the inclination angle. Coal dust deposited under the ceiling is easier to be ignited. As the temperature of the hot plate increases, the ignition delay time (IDT) is shortened. It is necessary to adjust the fire safety management according to the inclination conditions of the coal dust, especially in the area with an inclination angle of 150°–180°.
Author's H-index: 38