Kinetic modeling of an anaerobic fixed-bed reactor treating industrial wastewater containing hydrothermally solubilized sugarcane bagasse and post-treatment evaluation

ABSTRACTObjective: The quality of drinking water is important for public safety and quality of life. Thus, providing every person on earth safe drinking waterseems to be the biggest challenge in front of mankind. For this purpose, here we have investigated the fluoride removal capacity of java plum.Methods: In this study, removal of fluoride from industrial wastewater using fixed-bed reactor adsorption techniques by java plum seed (Syzygiumcumini) was investigated. Fixed-bed column experiments were carried out for different bed depths, influent fluoride concentrations, and various flowrates. The Thomas model and bed depth service time model were applied to the experimental results. Both model predictions verify the experimentaldata for all the process parameters studied, indicating that the models were suitable for java plum (S. cumini) seeds (Biosorbent) fix-bed columndesign.Results: The empty bed residence time (EBRT) model optimizes the EBRT, and the Thomas model showed that the adsorption capacity is stronglydependent on the flow rate, initial fluoride concentration, and bed depth and is greater under conditions of a lower concentration of fluoride, lowerflow rate, and higher bed depth.Conclusion: The experimental results were encouraging and indicate that java plum (S. cumini) seed is a feasible option to use as a biosorbent toremove fluoride in a fixed bed adsorption process.Keywords: Adsorption, Column experiment, Thomas model, Empty bed residence time, Java plum.

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Solar-driven steam-based gasification of sugarcane bagasse in a combined drop-tube and fixed-bed reactor – Thermodynamic, kinetic, and experimental analyses

Biomass and Bioenergy ◽

10.1016/j.biombioe.2013.03.003 ◽

2013 ◽

Vol 52 ◽

pp. 173-183 ◽

Cited By ~ 26

Author(s):

Michael Kruesi ◽

Zoran R. Jovanovic ◽

Elena C. dos Santos ◽

Hyung Chul Yoon ◽

Aldo Steinfeld

Keyword(s):

Sugarcane Bagasse ◽

Fixed Bed ◽

Fixed Bed Reactor ◽

Drop Tube ◽

Experimental Analyses

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Integrated Ozonation-Enzymatic Hydrolysis Pretreatment of Sugarcane Bagasse: Enhancement of Sugars Released to Expended Ozone Ratio

Processes ◽

10.3390/pr8101274 ◽

2020 ◽

Vol 8 (10) ◽

pp. 1274 ◽

Cited By ~ 1

Author(s):

Daryl Rafael Osuna-Laveaga ◽

Octavio García-Depraect ◽

Ramiro Vallejo-Rodríguez ◽

Alberto López-López ◽

Elizabeth León-Becerril

Keyword(s):

Enzymatic Hydrolysis ◽

Sugarcane Bagasse ◽

Fixed Bed ◽

Operating Conditions ◽

Fixed Bed Reactor ◽

Particle Sizes ◽

Combined Effects ◽

Sugar Release ◽

The Relationship ◽

Ozonation Process

The combined effects of three key ozonation process parameters on the integrated ozonation-enzymatic hydrolysis pretreatment of sugarcane bagasse (SCB) were investigated, with emphasis on the relationship between sugar release and ozone consumption. A lab-scale fixed bed reactor was employed for ozonation at varying ozone doses (50, 75 and 100 mg O3/g SCB), particle sizes (420, 710 and 1000 µm) and moisture contents (30, 45 and 60% w/w) in multifactorial experiments, keeping a residence time of 30 min. The ozonated SCB showed a reduction in the content of acid-insoluble lignin from 26.6 down to 19.1% w/w, while those of cellulose and hemicellulose were retained above 45.5 and 13.6% w/w, with recoveries of 100–89.9 and 83.5–72.7%, respectively. Ozone-assisted enzymatic hydrolysis allowed attaining glucose and xylose yields as high as 45.0 and 37.8%, respectively. The sugars released/ozone expended ratio ranged between 2.3 and 5.7 g sugars/g O3, being the higher value achieved with an applied ozone input of 50 mg O3/g SCB and SCB with 420 µm particle size and 60% moisture. Such operating conditions led to efficient ozone utilization (<2% unreacted ozone) with a yield of 0.29 g sugars/g SCB. Overall, the amount of sugars released relative to the ozone consumed was improved, entailing an estimated cost of ozonation of USD 34.7/ton of SCB, which could enhance the profitability of the process.

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Chemical Kinetics Modeling on Bio-Oil Production from Pyrolysis of Sugarcane Bagasse

Materials Science Forum ◽

10.4028/www.scientific.net/msf.1034.199 ◽

2021 ◽

Vol 1034 ◽

pp. 199-205

Author(s):

Dewi Selvia Fardhyanti ◽

Megawati ◽

Haniif Prasetiawan ◽

Noniek Nabuasa ◽

Mohammad Arik Ardianta

Keyword(s):

Sugarcane Bagasse ◽

Alternative Energy ◽

Fixed Bed ◽

Raw Material ◽

Fixed Bed Reactor ◽

Thermochemical Conversion ◽

Pyrolysis Process ◽

Product Analysis ◽

Biomass Waste ◽

Bio Oil

Biomass is a source of alternative energy that is environmentally friendly and very promising as one of the sources of renewable energy at present. The best candidate for the biomass waste for pyrolysis raw material is sugarcane bagasse. The sugarcane bagasse is a fibrous residue that is produced after crushing sugarcane for its extraction. Sugarcane bagasse is very potential to produce bio-oil through a pyrolysis process. The advantage of utilizing sugarcane bagasse is to reduce the amount of waste volume. Pyrolysis is a simple thermochemical conversion that transforms biomass with the near absence of absence of oxygen to produce fuel. Experiments were carried out on the fixed bed reactor. The analysis was carried out over a temperature range of 300-500 °C under atmospheric conditions. Products that are usually obtained from the pyrolysis process are bio-oil, char, and gas. Product analysis was performed using Gas Chromatography (GC) and Mass Spectrometry (MS) analysis. This research is aimed to study the kinetics of the sugarcane bagasse pyrolysis process to produce bio-oil. Three different models were proposed for the kinetic study and it was found that model III gave the best prediction on the calculation of pyrolysis process. From the calculation results, kinetic parameters which include activation energy (Ea) and the k factor (A) at a temperature of 300 °C is 2.4730 kJ/mol and 0.000335 s-1, at a temperature of 400 °C is 3, 2718 kJ/mol and 0.000563 s-1, and at a temperature of 500 °C is 4.8942 kJ/mol and 0.0009 s-1.

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Wastewater post-treatment for simultaneous ammonium removal and elemental sulfur recovery using a novel horizontal mixed aerobic-anoxic fixed-bed reactor configuration

Journal of Environmental Management ◽

10.1016/j.jenvman.2018.03.074 ◽

2018 ◽

Vol 215 ◽

pp. 358-365 ◽

Cited By ~ 5

Author(s):

R.B.S. Guerrero ◽

M. Zaiat

Keyword(s):

Elemental Sulfur ◽

Fixed Bed ◽

Post Treatment ◽

Fixed Bed Reactor ◽

Sulfur Recovery ◽

Reactor Configuration ◽

Ammonium Removal

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- Anaerobic Fixed Bed Reactor for Treatment of Industrial Wastewater

Wastewater Treatment ◽

10.1201/b12172-16 ◽

2012 ◽

pp. 350-369

Keyword(s):

Industrial Wastewater ◽

Fixed Bed ◽

Fixed Bed Reactor

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Fractionation of coal through organo-separative refining for enhancing its potential for the CO2-gasification

International Journal of Coal Science & Technology ◽

10.1007/s40789-020-00348-7 ◽

2020 ◽

Vol 7 (3) ◽

pp. 504-515 ◽

Cited By ~ 2

Author(s):

Heena Dhawan ◽

Rohit Kumar ◽

Sreedevi Upadhyayula ◽

K. K. Pant ◽

D. K. Sharma

Keyword(s):

Sugarcane Bagasse ◽

Coal Gasification ◽

Ambient Pressure ◽

Fixed Bed ◽

Fixed Bed Reactor ◽

Inert Gas ◽

Coal Structure ◽

Gasification Reactivity ◽

Gasification Process ◽

Residual Coal

Abstract Coal gasification has already been extensively studied earlier under varying conditions of steam, CO2, O2, inert conditions. Belbaid coal and its e, N and NMP-DETA SCC products recovered through organo-refining under milder ambient pressure conditions were subjected to CO2-gasification in a fixed bed reactor under varying conditions. CO2 being an inert gas becomes the most challenging to be utilized during the gasification process. The SCCs showed better CO2-gasification reactivity than the raw Belbaid coal at 900 °C. The use of the catalyst K2CO3 tremendously increased the gasification reactivity for both raw coal and the SCCs. The use of sugarcane bagasse for CO2-gasification along with raw coal as well as with residual coal was also studied. Gasification under CO2 atmosphere conditions was used to structurally understand the coals as the coal structure gets loosened after extraction.

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