Nitrate green removal by fixed-bed columns packed with waste biomass: Modelling and friction parameter estimation

2020 ◽  
Vol 154 ◽  
pp. 250-261 ◽  
Author(s):  
Giorgio Vilardi ◽  
Roberto Bubbico ◽  
Luca Di Palma ◽  
Nicola Verdone
Keyword(s):  
Parameter Estimation ◽  
Fixed Bed ◽  
Waste Biomass ◽  
Friction Parameter

scholarly journals Online friction parameter estimation for machine tools

2020 ◽  
Vol 2 (1) ◽  
pp. e28
Author(s):  
Dimitrios Papageorgiou ◽  
Mogens Blanke ◽  
Hans Henrik Niemann ◽  
Jan H. Richter
Keyword(s):  
Parameter Estimation ◽  
Machine Tools ◽  
Friction Parameter

scholarly journals Continuous Fixed-Bed Column Studies on Congo Red Dye Adsorption-Desorption Using Free and Immobilized Nelumbo nucifera Leaf Adsorbent

Polymers ◽  
2021 ◽  
Vol 14 (1) ◽  
pp. 54
Author(s):  
Vairavel Parimelazhagan ◽  
Gautham Jeppu ◽  
Nakul Rampal
Keyword(s):  
Congo Red ◽  
Agricultural Waste ◽  
Fixed Bed ◽  
Dye Adsorption ◽  
Nelumbo Nucifera ◽  
Substantial Contribution ◽  
Flow Mode ◽  
Waste Biomass ◽  
Column Studies ◽  
Fixed Bed Column

The adsorption of Congo red (CR), an azo dye, from aqueous solution using free and immobilized agricultural waste biomass of Nelumbo nucifera (lotus) has been studied separately in a continuous fixed-bed column operation. The N. nucifera leaf powder adsorbent was immobilized in various polymeric matrices and the maximum decolorization efficiency (83.64%) of CR occurred using the polymeric matrix sodium silicate. The maximum efficacy (72.87%) of CR dye desorption was obtained using the solvent methanol. Reusability studies of free and immobilized adsorbents for the decolorization of CR dye were carried out separately in three runs in continuous mode. The % color removal and equilibrium dye uptake of the regenerated free and immobilized adsorbents decreased significantly after the first cycle. The decolorization efficiencies of CR dye adsorption were 53.66% and 43.33%; equilibrium dye uptakes were 1.179 mg g–1 and 0.783 mg g–1 in the third run of operation with free and immobilized adsorbent, respectively. The column experimental data fit very well to the Thomas and Yoon–Nelson models for the free and immobilized adsorbent with coefficients of correlation R2 ≥ 0.976 in various runs. The study concludes that free and immobilized N. nucifera can be efficiently used for the removal of CR from synthetic and industrial wastewater in a continuous flow mode. It makes a substantial contribution to the development of new biomass materials for monitoring and remediation of toxic dye-contaminated water resources.

scholarly journals A comparison of Bayesian inference and gradient-based approaches for friction parameter estimation

2020 ◽  
Author(s):  
Simon Warder ◽  
Athanasios Angeloudis ◽  
Stephan Kramer ◽  
Colin Cotter ◽  
Matthew Piggott
Keyword(s):  
Parameter Estimation ◽  
Bayesian Inference ◽  
Friction Parameter ◽  
Gradient Based

Batch and Fixed Bed Biosorption of Copper by Acidified Algae Waste Biomass

2018 ◽  
Vol 57 (34) ◽  
pp. 11767-11777 ◽  
Author(s):  
Geovani Rocha de Freitas ◽  
Melissa Gurgel Adeodato Vieira ◽  
Meuris Gurgel Carlos da Silva
Keyword(s):  
Fixed Bed ◽  
Waste Biomass

scholarly journals CO2 emission from combustion of lignite, waste plastics and biomass mixture pellets

2019 ◽  
Vol 25 (3) ◽  
pp. 239-246
Author(s):  
Neslihan Duranay
Keyword(s):  
Flue Gas ◽  
Co2 Emission ◽  
Fixed Bed ◽  
Volatile Matter ◽  
Waste Biomass ◽  
Waste Plastics ◽  
Waste Plastic ◽  
Plastic Bags ◽  
Gain Energy ◽  
Plastic Ratio

Combustion is a familiar technique for disposal of urban wastes such as plastics when their recycling is impractical. It offers energy recycling and waste diminution. In this paper, combustion behaviours of blend pellets composed of binary and triple mixtures of plastic wastes, biomass and lignite in a laboratoryscale fixed-bed combustion system were examined. The materials chosen as waste plastic, biomass and lignite were, respectively, market plastic bags, furniture plant waste powder and Bing?l Karl?ova lignite. The effect of varied blend pellet composition on the combustion behaviour and CO2 emission in flue gas during combustion was examined. It was observed that the rate and efficiency of combustion increased with increasing plastic ratio in the blend pellets. It was found that the amount of carbon increased with the ratio of waste plastics added to blends, which also increased the CO2 ratio in the flue gas during the volatile matter combustion period. It was concluded that burning waste plastic bags with low-quality lignite or waste biomass could be a viable option to get rid of them and to gain energy.

Numerical Study of Solid Biomass Fuel in a Gasifier System

2014 ◽  
Vol 953-954 ◽  
pp. 191-194
Author(s):  
Ming Yung Wang ◽  
Hsiao Kang Ma
Keyword(s):  
Numerical Study ◽  
Fixed Bed ◽  
Biomass Fuel ◽  
Waste Biomass ◽  
Operation Condition ◽  
Fire Dynamics ◽  
Fuel Gas ◽  
Cold Gas Efficiency ◽  
Downdraft Fixed Bed ◽  
Solid Biomass

In this study, the gasification processes of different Taiwan’s agriculture wastes were studied by using software of Fire Dynamics Simulator (FDS), which developed by American National Institute of Standards and Technology (NIST), to build a model of downdraft fixed bed gasifier. Details of the operation condition for the Taiwan’s agriculture waste biomass fuel in the gasifier were obtained. They include traction fan speed, leakage air, internal temperature, moisture, and cold gas efficiency. The simulated results are found in small type fixed bed biomass gasifier under traction fan initial speed is 0.2m/s, the leakage air in the gasification area is less than 10% of the amount of wind quantity by traction fan and moisture content of solid biomass is limited at 10% ~ 20%(vol.) that temperature in gasification zone with steady supply fuel gas condition is near 850~900°C.

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