Theoretical Calculation and Analysis on the Gasification and Melting Process of MSW with Oxygen-Enriched Air

2012 ◽  
Vol 610-613 ◽  
pp. 2179-2182 ◽  
Author(s):  
Jun Zhao ◽  
Shu Zhong Wang ◽  
Zhi Qiang Wu ◽  
Lin Chen
Keyword(s):  
Moisture Content ◽  
Theoretical Calculation ◽  
Process Parameters ◽  
Calorific Value ◽  
Melting Process ◽  
Solid Wastes ◽  
High Moisture Content ◽  
High Moisture ◽  
Municipal Solid Wastes ◽  
Gasification And Melting

Gasification and melting process is an environmentally friendly technology in municipal solid wastes (MSW) disposal. But it requires that the waste has lower moisture content. The author hopes to find a route can be used for the treatment of high moisture content MSW through gasification and melting by theoretical calculation and analysis. In this paper, firstly calculate the influence of moisture content on MSW calorific value and exhaust smoke temperature. Then calculate the influence of oxygen concentration on exhaust smoke temperature. Finally appropriate process parameters of gasification melting for high moisture content MSW are given.

Combining Anaerobic Digestion and Waste-to-Energy

2004 ◽  
Author(s):  
Karena M. Ostrem ◽  
Karsten Millrath ◽  
Nickolas J. Themelis
Keyword(s):  
Anaerobic Digestion ◽  
Large Fraction ◽  
Solid Wastes ◽  
Waste To Energy ◽  
High Moisture Content ◽  
High Moisture ◽  
Municipal Solid Wastes ◽  
Heating Value ◽  
Natural Organic Compounds ◽  
Further Development

A large fraction of the municipal solid wastes (MSW) stream in the U.S. comprises of natural organic compounds (i.e., food and plant wastes) with high moisture content and low heating value. While these properties are undesirable during the combustion of MSW in waste-to-energy (WTE) plants, they are required for anaerobic digestion (AD). During AD, methane gas is produced that can be captured and used for energy generation. The required long residence times limit the throughput of an AD plant but further development may result in increasing the rates of bioreactions. This paper introduces current AD practices and identifies possible synergies between AD and WTE. It is suggested that co-siting of WTE and AD facilities may result in mutual benefits.

scholarly journals Effects of Biomass Moisture Content and Process Temperature on Biopellet Quality Derived from Rubber Seed Shell and Ater Bamboo (Gigantochloa atter)

2018 ◽  
Vol 10 (2) ◽  
pp. 63-74 ◽  
Author(s):  
I Dewa Gede Putra Prabawa
Keyword(s):  
Moisture Content ◽  
Bulk Density ◽  
Calorific Value ◽  
Process Temperature ◽  
High Moisture Content ◽  
High Moisture ◽  
Rubber Seed ◽  
Mechanical Durability ◽  
European Standards

The purposes of this research were to study the ieffects of biomass moisture content and process temperature on the quality of biopellet derived from rubber seed shell and bamboo ater (Gigantochloa atter). The biomass was conditioned at different moisture contents (6, 12, 14, 16, 18, and 20% w/w), and the biopelet was produced at a pressure of 597,24 kg/cm2 with various process temperatures (100, 125, 150, 175, and 200oC). The results showed that the properties of produced biopellets were significantly affected by the variation of moisture content and process temperature. High moisture content of biomass could increase the moisture content of biopellet while the calorific value and ash content decreased. With the increase in process temperatures, calorific value and ash increased whereas the moisture content of biopellet decreased. Mechanical durability was enhanced with the increase inthe moisture content of biomass, starting from 6% to 18%;and was improved with the increase in the process temperatures, starting from 100oC to 175oC. However, the bulk density of biopellet increased with the increase inthe moisture content of biomass, starting from 6% to 16%, and was improved with the increase in the process temperatures from 100oC to 150oC. The best quality of biopellet was produced  in the biomass moisture content of 16% and the process temperature of 150oC. That biopellet had mechanical durability of 99.16%, calorific value of 4,402 cal/g, bulk density of 1,157 kg/m3, moisture content of 6.71%, ash of 1.19%, nitrogen of 0.15%, Sulphur of 0.013%, and chlorine of <0.1 ppm. That biopellet quality met European standards (EN 14961-2).

Drying kinetics of processed natural coffee with high moisture content

2017 ◽  
Vol 12 (3) ◽  
pp. 400 ◽  
Author(s):  
Valdiney Cambuy Siqueira ◽  
Flávio Meira Borém ◽  
Guilherme Euripedes Alves ◽  
Eder Pedroza Isquierdo ◽  
Afonso Celso Ferreira Pinto ◽  
...  
Keyword(s):  
Moisture Content ◽  
Drying Kinetics ◽  
High Moisture Content ◽  
High Moisture ◽  
Kinetics Of

Objetivou-se, com o presente trabalho, propor um novo método de processamento e secagem, assim como avaliar o comportamento dos grãos submetidos a este processo, por meio da taxa de redução de água e do ajuste de diferentes modelos matemáticos aos dados experimentais da secagem. Os frutos colhidos no estágio maduro foram divididos em três lotes. O primeiro foi seco continuamente à temperatura de 40±1 °C. O segundo consiste na secagem do café natural até os teores de água de 0,56±0,02, 0,41±0,02, 0,28±0,02 e 0,20±0,02 decimal (base seca, b.s.), seguido de beneficiamento e secagem contínua nas temperaturas de 35±1 ºC e 40±1 ºC. O terceiro lote correspondeu à secagem contínua do café descascado e desmucilado na temperatura de 40±1 °C. Em todos os lotes, a secagem foi encerrada quando os grãos atingiram o teor de água de 0,12±0,05 (b.s.). Aos dados experimentais da secagem foram ajustados dez modelos matemáticos utilizados para representação da secagem dos produtos agrícolas. Além da representação da cinética de secagem foi avaliada a taxa de redução de água dos grãos. Conclui-se que a taxa de redução de água é maior para a temperatura de secagem de 40±1 °C, especialmente para maiores teores de água. O tempo total de secagem do café beneficiado com alto teor de água é expressivamente reduzido, quando comparado ao tempo de secagem completa do café natural. O modelo de Midilli descreve satisfatoriamente a cinética de secagem do café beneficiado.

Optimization of drying of low-grade coal with high moisture content using a disc dryer

2014 ◽  
Vol 124 ◽  
pp. 267-274 ◽  
Author(s):  
Seung-Hyun Moon ◽  
In-Soo Ryu ◽  
Seung-Jae Lee ◽  
Tae-In Ohm
Keyword(s):  
Moisture Content ◽  
Low Grade ◽  
High Moisture Content ◽  
High Moisture

scholarly journals Biodrying process: a sustainable technology for treatment of municipal solid wastes organic fraction

2018 ◽  
Author(s):  
Nabil Kechaou ◽  
E Ammar
Keyword(s):  
Organic Matter ◽  
Moisture Content ◽  
Energy Recovery ◽  
Pollution Source ◽  
Solid Wastes ◽  
Waste To Energy ◽  
Organic Fraction ◽  
Municipal Solid Wastes ◽  
Moisture Contents ◽  
Forced Aeration

The Municipal Solid Waste of Agareb (Sfax –Tunisia), characterized by high organic fraction and moisture contents is the most worrying pollution source that must be managed by innovative treatment and recycling technologies. Bio-drying, as a waste to energy conversion technology, aims at reducing moisture content of this organic matter. This concept,  similar to composting, is accomplished by using the heat generated from the microbial degradation of the waste matrix, while forced aeration is used. The purpose of this work was to reduce the moisture content of the waste, by maximizing drying and minimizing organic matter biodegradation, in order to produce a solid recovered fuel with high calorific value.Keywords: Municipal solid wastes; organic matter; biodrying; composting; energy recovery.

scholarly journals Key Metallurgical Parameters of Fe-Ni Production During 1984–1997 and 2007–2017 at the Ferronickel Smelter in Drenas

2020 ◽  
Vol 67 (2) ◽  
pp. 73-77
Author(s):  
Zarife Bajraktari-Gashi ◽  
Muharrem Zabeli ◽  
Behram Halilaj
Keyword(s):  
Moisture Content ◽  
Casting Process ◽  
The Philippines ◽  
High Moisture Content ◽  
High Moisture ◽  
Nickel Ores ◽  
Iron Nickel ◽  
Rotary Kilns ◽  
The Republic ◽  
Laterite Ore

AbstractDuring 1984–1997, the ferronickel plant in Drenas used iron-nickel ore from the mines of the Republic of Kosovo: Glavica and Çikatove (Dushkaje and Suke) mines. However, during the years 2007–2017, when the plant started operating from the cessation of production, which was from 1998 to 2007, some types of iron-nickel ores from different countries began to be used, starting from iron-nickel ores from Kosovo, iron-nickel ores from Albania, ores from Indonesia, ores from the Philippines, ores from Guatemala, ores from Turkey and ores from Macedonia. The ore composition, however, is mainly oxide-laterite ore. Iron-nickel ores in the plant are characterised by high moisture content, a very important factor influencing the process of scraping the charge in rotary kilns and presenting in general. Among the iron-nickel ore used in the ferronickel plant, the ores from Albania are characterised due to their low moisture content when compared with the other ores as well as the high content of iron oxides, which affect the temperature rise inside the furnaces, as the iron ores play an important role in the pre-casting process in rotary kilns.

scholarly journals Mycoflora of sawn timbers in Benin City

2014 ◽  
Vol 23 (2) ◽  
pp. 89-95
Author(s):  
J. A. Okhuoya ◽  
S. O. Itaman
Keyword(s):  
Moisture Content ◽  
Pleurotus Ostreatus ◽  
Fungal Species ◽  
High Moisture Content ◽  
High Moisture ◽  
Benin City ◽  
The Poor ◽  
High Incidence

In a fungal suryey of sawn timbers in scattared localities in Benin City, fungal species isolated were mainly members of <i>Hyphomycetes</i>, with few <i>Ascomycetes</i> and<i> Basidiomycetes</i>. Cellulolytic abilities of isolates were determined and found to be highest in a basidiomycete, <i>Pleurotus ostreatus</i>. The high incidence of these isolates was traced to the poor ventillation in the shades where the timbers arę sold and the high moisture content of timber before display for sale.

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