The Effect of Bio-Drying Pretreatment on Heating Values of Municipal Solid Waste

2014 ◽  
Vol 1010-1012 ◽  
pp. 537-546 ◽  
Author(s):  
Shu Qing Zhao ◽  
Wen Xiong Huang ◽  
Ran Yin ◽  
Song Yuan ◽  
Dan Dan Huang ◽  
...  
Keyword(s):  
Municipal Solid Waste ◽  
Solid Waste ◽  
Water Content ◽  
Removal Rate ◽  
Airflow Rate ◽  
Energy Capacity ◽  
Drying Process ◽  
Heating Value ◽  
Gross Energy ◽  
Average Water

Bio-drying process, degrading part of the easily biodegradable organic fraction contained in waste, produces heat that combined with an adequate airflow-rate, allows the fast evaporation of waste moisture content. Three ventilation methods were used to investigate the effect of bio-drying pretreatment on municipal solid waste (MSW) characteristics (including water content, mass, heating value and the gross energy capacity). The results show that the water content of MSW decreased from 61.5% to minimum 23.7% after 18 days bio-drying, whereas its lower heating value (LHV) increased an average of 168% from 5413 kJ/kg. In the three trials, the highest LHV amounted to 15.8 MJ/kg, which achieved the LHV demand of solid recovery fuel (SRF). In bio-drying process, the average water removal rate was 80.6%. Smaller organic matter degradation led to a great decline of the water content; therefore, the decrease of gross energy capacity of MSW is not significant.

scholarly journals Municipal solid waste higher heating value prediction from ultimate analysis using multiple regression and genetic programming techniques

2018 ◽  
Vol 37 (6) ◽  
pp. 578-589 ◽  
Author(s):  
Imane Boumanchar ◽  
Younes Chhiti ◽  
Fatima Ezzahrae M’hamdi Alaoui ◽  
Abdelaziz Sahibed-dine ◽  
Fouad Bentiss ◽  
...  
Keyword(s):  
Genetic Programming ◽  
Municipal Solid Waste ◽  
Solid Waste ◽  
Multiple Regression ◽  
Calorific Value ◽  
Heating Value ◽  
Ultimate Analysis ◽  
Msw Management ◽  
Important Challenge ◽  
Programming Techniques

Municipal solid waste (MSW) management presents an important challenge for all countries. In order to exploit them as a source of energy, a knowledge of their calorific value is essential. In fact, it can be experimentally measured by an oxygen bomb calorimeter. This process is, however, expensive. In this light, the purpose of this paper was to develop empirical models for the prediction of MSW higher heating value (HHV) from ultimate analysis. Two methods were used: multiple regression analysis and genetic programming formalism. Both techniques gave good results. Genetic programming, however, provides more accuracy compared to published works in terms of a great correlation coefficient (CC) and a low root mean square error (RMSE).

Heating Value of Municipal Solid Waste

1987 ◽  
Vol 5 (1) ◽  
pp. 141-145 ◽  
Author(s):  
C. Finet
Keyword(s):  
Municipal Solid Waste ◽  
Solid Waste ◽  
Heating Value

scholarly journals Characterization of Refuse Derived Fuel Production from Municipal Solid Waste: The Case Studies in Latvia and Lithuania

2020 ◽  
Vol 24 (3) ◽  
pp. 112-118
Author(s):  
Dace Âriņa ◽  
Rūta Bendere ◽  
Gintaras Denafas ◽  
Jānis Kalnačs ◽  
Mait Kriipsalu
Keyword(s):  
Municipal Solid Waste ◽  
Solid Waste ◽  
Calorific Value ◽  
Ash Content ◽  
Fuel Production ◽  
Heating Value ◽  
Refuse Derived Fuel ◽  
Morphological Composition ◽  
The Mean

AbstractThe authors determined the morphological composition of refuse derived fuel (RDF) produced in Latvia and Lithuania by manually sorting. The parameters of RDF (moisture, net calorific value, ash content, carbon, nitrogen, hydrogen, sulphur, chlorine, metals) was determined using the EN standards. Comparing obtained results with data from literature, authors have found that the content of plastic is higher but paper and cardboard is lower than typical values. Results also show that the mean parameters for RDF can be classified with the class codes: Net heating value (3); chlorine (3); mercury (1), and responds to limits stated for 3rd class of solid recovered fuel. It is recommended to separate biological waste at source to lower moisture and ash content and increase heating value for potential fuel production from waste.

Bio-drying of municipal solid waste with high water content by aeration procedures regulation and inoculation

2008 ◽  
Vol 99 (18) ◽  
pp. 8796-8802 ◽  
Author(s):  
Dong-Qing Zhang ◽  
Pin-Jing He ◽  
Tai-Feng Jin ◽  
Li-Ming Shao
Keyword(s):  
Municipal Solid Waste ◽  
Solid Waste ◽  
Water Content ◽  
High Water ◽  
High Water Content

Laboratory test investigations on soil water characteristic curve and air permeability of municipal solid waste

2018 ◽  
Vol 36 (5) ◽  
pp. 463-470 ◽  
Author(s):  
Jianyong Shi ◽  
Xun Wu ◽  
Yingbo Ai ◽  
Zhen Zhang
Keyword(s):  
Municipal Solid Waste ◽  
Solid Waste ◽  
Water Content ◽  
Permeability Coefficient ◽  
Inflection Point ◽  
Void Ratio ◽  
Characteristic Curve ◽  
Air Permeability ◽  
Residual Water ◽  
Residual Water Content

The air permeability coefficient has a high correlation with the water content of municipal solid waste. In this study, continuous drying methodology using a tension meter was employed to construct the soil water characteristic curve of municipal solid waste (M-SWCC). The municipal solid waste air permeability test was conducted by a newly designed apparatus. The measured M-SWCC was well reproduced by the van Genuchten (V-G) model and was used to predict the parameters of typical points in M-SWCC, including saturated water content, field capacity, residual water content and water content at the inflection point. It was found that the M-SWCC was significantly influenced by void ratio. The final evaporation and test period of M-SWCC increase with the increase in void ratio of municipal solid waste. The evolution of air permeability coefficient with water content of municipal solid waste depicted three distinct characteristic stages. It was observed that the water contents that corresponded to the two cut-off points of the three stages were residual water content and water content at the inflection point, respectively. The air permeability coefficient of municipal solid waste decreased with the increase of the water content from zero to the residual water content. The air permeability coefficient was almost invariable when the water content increased from residual water content to the water content at the inflection point. When the water content of municipal solid waste exceeded the water content at the inflection point, the air permeability coefficient sharply decreased with the increase of water content.

Microwave Torrefaction of Moist Municipal Solid Waste (MSW) Pellets with the Addition of Char from Agricultural Residues

2017 ◽  
Vol 757 ◽  
pp. 156-160
Author(s):  
Prodpran Siritheerasas ◽  
Phichayanan Waiyanate ◽  
Hidetoshi Sekiguchi ◽  
Satoshi Kodama
Keyword(s):  
Municipal Solid Waste ◽  
Solid Waste ◽  
Bituminous Coal ◽  
Volatile Matter ◽  
Agricultural Residues ◽  
Microwave Oven ◽  
Microwave Absorber ◽  
Mass Yield ◽  
Heating Value ◽  
Microwave Absorbers

An investigation of the effect of the addition of char from agricultural residues on the torrefaction of moist municipal solid waste (MSW) pellets (40 wt.% moisture) was carried out in a microwave oven (500-800 W for 4-12 minutes). Char from agricultural residues, including corncob, palm shell, straw, and bagasse, was used as the microwave absorbers to enhance the absorption of microwave irradiation. It was found that the addition of char from bagasse yielded the lowest remaining mass (or mass yield) and volatile matter (VM) content, but the highest temperature and heating value, of the torrefied MSW pellet. Moisture in the MSW pellet with or without the addition of microwave absorber was completely removed after being torrefied for 8-12 minutes. The VM contents remained in the MSW pellets with the addition of microwave absorbers were lower than that in the MSW pellet without the addition of microwave absorber. The addition of microwave absorbers led to an increase in carbon (C) content but a decrease in oxygen (O) content of the torrefied MSW pellets, compared to those of the raw MSW pellet. The heating values of the torrefied MSW pellets with the addition of microwave absorbers were equivalent to that of sub-bituminous coal, enhanced from that of the raw MSW pellet, which was lower than that of lignite.

Effect of materials mixture on the higher heating value: Case of biomass, biochar and municipal solid waste

2017 ◽  
Vol 61 ◽  
pp. 78-86 ◽  
Author(s):  
Imane Boumanchar ◽  
Younes Chhiti ◽  
Fatima Ezzahrae M’hamdi Alaoui ◽  
Amal El Ouinani ◽  
Abdelaziz Sahibed-Dine ◽  
...  
Keyword(s):  
Municipal Solid Waste ◽  
Solid Waste ◽  
Heating Value

Assessment of the Potential of Energy Recovery from Organic Fraction of Municipal Solid Waste

2020 ◽  
Vol 46 (3) ◽  
pp. 160-167
Author(s):  
Made Gunamantha
Keyword(s):  
Potential Energy ◽  
Municipal Solid Waste ◽  
Solid Waste ◽  
Energy Recovery ◽  
Lignin Content ◽  
Empirical Relationship ◽  
Organic Fraction ◽  
Heating Value ◽  
Ultimate Analysis ◽  
Astm Method

Organic fraction of municipal solid waste (OFMSW) is the largest fraction of waste generated in Indonesia. This study was meant to examine the theoretical and experimental results for potential energy recovery from OFMSW in Indonesia. Bioconversion and thermochemical approach were used theoretically. The potential energy recoveries were calculated using the empirical relationship between higher heating value (HHV) and the ultimate analysis, stoichiometric, and thermochemistry concept. The HHV and ultimate analysis of OFMSW were determined by ASTM method while the lignin content and volatile solid were adopted from previous studies. The result indicated that the thermochemical approach given the potential energy recovery is higher than others.

Sign in / Sign up

Export Citation Format

Share Document