scholarly journals Lab-Scale Study of Temperature and Duration Effects on Carbonized Solid Fuels Properties Produced from Municipal Solid Waste Components

Materials ◽  
2021 ◽  
Vol 14 (5) ◽  
pp. 1191
Author(s):  
Kacper Świechowski ◽  
Paweł Stępień ◽  
Ewa Syguła ◽  
Jacek A. Koziel ◽  
Andrzej Białowiec
Keyword(s):  
Experimental Data ◽  
Municipal Solid Waste ◽  
Solid Waste ◽  
Regression Models ◽  
Pyrolysis Temperature ◽  
Solid Fuels ◽  
Mass Yield ◽  
Kitchen Waste ◽  
Simple Tool ◽  
Proximate And Ultimate Analysis

In work, data from carbonization of the eight main municipal solid waste components (carton, fabric, kitchen waste, paper, plastic, rubber, paper/aluminum/polyethylene (PAP/AL/PE) composite packaging pack, wood) carbonized at 300–500 °C for 20–60 min were used to build regression models to predict the biochar properties (proximate and ultimate analysis) for particular components. These models were then combined in general models that predict the properties of char made from mixed waste components depending on pyrolysis temperature, residence time, and share of municipal solid waste components. Next, the general models were compared with experimental data (two mixtures made from the above-mentioned components carbonized at the same conditions). The comparison showed that most of the proposed general models had a determination coefficient (R2) over 0.6, and the best prediction was found for the prediction of biochar mass yield (R2 = 0.9). All models were implemented into a spreadsheet to provide a simple tool to determine the potential of carbonization of municipal solid waste/refuse solid fuel based on a local mix of major components.

scholarly journals Evaluation of Maturity and Odor Emissions in the Process of Combined Composting of Kitchen Waste and Garden Waste

2021 ◽  
Vol 11 (12) ◽  
pp. 5500
Author(s):  
Bangxi Zhang ◽  
Feifei Fan ◽  
Chao Guo ◽  
Mingji Yu ◽  
Mingcan Zhao ◽  
...  
Keyword(s):  
Municipal Solid Waste ◽  
Solid Waste ◽  
Kitchen Waste ◽  
Odor Emissions ◽  
Maturity Effect ◽  
Better Than ◽  
Garden Waste

With the development of urbanization, kitchen waste and garden waste have become an important part of municipal solid waste (MSW), which is in urgent need of resource treatment. This study investigated the impacts of garden waste as auxiliary materials on maturity and odor emissions (NH3 and H2S) during kitchen waste composting. The result showed that the combined composting product of kitchen waste and garden waste achieved the maturity effect, and the co-composting effect was better than that of separate composting of kitchen waste. Meanwhile, compared with the separate composting treatment of kitchen waste, the co-composting treatment of kitchen waste and garden waste can effectively reduce the cumulative emissions of H2S by more than 85%, and effectively reduce the cumulative emissions of NH3 by more than 75%. This study provides a technical reference for the green fertilizer utilization of kitchen waste and garden waste.

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.

scholarly journals Physical components and influence factors of municipal solid waste (MSW) in the residential area of Beijing

2019 ◽  
Vol 118 ◽  
pp. 04012
Author(s):  
Hongyu Zhang ◽  
Guiqin Wang ◽  
Yaxuan Bai ◽  
Rihui Chen ◽  
Li Zhang
Keyword(s):  
Municipal Solid Waste ◽  
Solid Waste ◽  
Family Income ◽  
Great Influence ◽  
Residential Area ◽  
Kitchen Waste ◽  
Beijing Area ◽  
Educational Backgrounds ◽  
The Family ◽  
Building Area

The treatment, disposal and management of municipal solid waste strongly depend on the composition and characteristics of municipal solid waste. The Physical composition of MSW and its influencing factors were investigated and analyzed in the residential of Beijing area. The result showed that the composition of MSW in four seasons was similar, and the kitchen was the main composition of MSW, accounting for 69-74% of the total amount of MSW. The average age of families, educational backgrounds, family income and building area have a great influence on the physical proportion of MSW. As the average age of the family increases, the proportion of other wastes was gradually reduced, the proportion of the harmful waste was increased. With the increase of educational backgrounds and family income, the content of kitchen waste decreased, while the content of recyclable waste increased obviously. The 50 square meters was used as a dividing point for the residential area of the family, the kitchen waste decreased at first and then increased, while the proportion of disposable packaging and other waste increases at first and then decreases with the increase of building area.

Municipal Solid Waste Management Practice in China - A Case Study in Hangzhou

2014 ◽  
Vol 878 ◽  
pp. 23-29
Author(s):  
Jing Ying Ma ◽  
Jian Yi Zhan ◽  
Yue Jun Zhang
Keyword(s):  
Waste Management ◽  
Municipal Solid Waste ◽  
Solid Waste ◽  
Hazardous Waste ◽  
Solid Waste Management ◽  
Source Separation ◽  
Capital City ◽  
Comprehensive Treatment ◽  
Municipal Solid Waste Management ◽  
Kitchen Waste

The management of municipal solid waste (MSW) in China is facing urgent problems with rapid industrialization and urbanization. This article focused on the status of Hangzhou, capital city of Zhejiang province, China. The regulations, policies, implementation, barriers and solutions about source separation, separate collection, clean & direct transportation, treatment and disposal were introduced. Source separation, separate collection and clean & direct transportation were seriously carried out from 2010. MSW was classified into four kinds, such as kitchen waste, hazardous waste, recyclable waste and other waste. Four kinds of wastes were collected, transported, treated and disposed, respectively. At the same time, a questionnaire survey was conducted in 2011 on 200 households in Xiasha and Gongshu Districts in Hangzhou. The results indicate that many citizens cannot effectively and correctly separated different kinds of solid wastes. Kitchen waste was directly disposed in landfill, because there is no composting plant in Hangzhou City. The collection of recoverable waste and hazardous waste was not in control of municipal solid waste management (MSWM) system. In order to optimize MSWM system in Hangzhou, the government and the citizen must make efforts in source separation, comprehensive treatment system, effective regulations and policies.

Pyrolysis Experiment of Refuse Derived Fuel and Study on Characteristics of Semi-Coke

2013 ◽  
Vol 671-674 ◽  
pp. 2626-2630
Author(s):  
Yan Ji Li ◽  
Ke Wei Zou ◽  
Ning Zhao ◽  
Run Dong Li ◽  
Yong Chi
Keyword(s):  
High Temperature ◽  
Municipal Solid Waste ◽  
Solid Waste ◽  
Pyrolysis Temperature ◽  
Experimental Conditions ◽  
Variation Trend ◽  
Refuse Derived Fuel ◽  
Apparent Variation ◽  
Pyrolysis Experiment ◽  
Variation Trends

The experimental material is source-separated municipal solid waste. Remaining waste from primary assortment is compressed into RDF with mechanical molding equipment. We used high-temperature tube furnace for pyrolysis experiment of RDF. The effects of pyrolysis temperature, material composition, choice of additives and the content of the additive on the productivity of pyrolysis for these samples were investigated; the variation trend of content for K and Na elements in semi-coke was analyzed under various factors. The results show that adding plastics, CaO or DHC-32 is conductive to improve the effect of RDF pyrolysis. Increasing pyrolysis temperature is in favor of the process of pyrolysis reaction, meanwhile, the apparent variation trends are presented for the content of K and Na in semi-coke under the various experimental conditions.

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