Effect of moisture content on the characterization of products from the pyrolysis of sewage sludge

2013 ◽  
Vol 104 ◽  
pp. 632-639 ◽  
Author(s):  
Sijiang Xiong ◽  
Jiankun Zhuo ◽  
Beiping Zhang ◽  
Qiang Yao
Keyword(s):  
Sewage Sludge ◽  
Moisture Content ◽  
Effect Of Moisture

Effect of moisture content in sewage sludge on air gasification

2010 ◽  
Vol 38 (5) ◽  
pp. 615-620 ◽  
Author(s):  
Li-ping XIE ◽  
Tao LI ◽  
Jian-dong GAO ◽  
Xue-ning FEI ◽  
Xia WU ◽  
...  
Keyword(s):  
Sewage Sludge ◽  
Moisture Content ◽  
Effect Of Moisture

Characterization of char from slow pyrolysis of sewage sludge

2016 ◽  
Vol 73 (10) ◽  
pp. 2370-2378 ◽  
Author(s):  
Wen-Ying Xu ◽  
Di Wu
Keyword(s):  
Sewage Sludge ◽  
Moisture Content ◽  
Surface Area ◽  
Iodine Value ◽  
Heating Rates ◽  
Adsorption Characteristics ◽  
Equilibrium Data ◽  
Adsorption Equilibrium Data ◽  
Methylene Blue Value

The effects of final pyrolysis temperature Tend from 300 ºC to 550 ºC, heating rates β of 2 ºC/min, 3 ºC/min and 5 ºC/min, retention time RT from 45 min to 90 min, and the moisture content MC from 0 to 70% on characteristics of the pyrolysis char from sewage sludge were investigated using a tube furnace in this study. The resulting chars were characterized by sorption of nitrogen (surface area and pore volume). Their adsorption characteristics were evaluated via iodine value and methylene blue value. Either the pore structures or adsorption characteristics depend on the pyrolysis processing and moisture content of the sludge precursors. In terms of iodine value and surface area of the char, Tend of 450 ºC, RT of 75 min and β of 3 ºC/min proved the optimum combination of pyrolysis parameters. The chars have an undeveloped mesopore and macropore structure and a developed micropore structure. The sodium phenoxide adsorption equilibrium data fit well with the Langmuir model of adsorption, suggesting monolayer coverage of sodium phenoxide molecules at the surface of the char. Its adsorption mechanism is mainly physical in nature, enhanced by chemisorption.

EFFECT OF MOISTURE AND PARTICLE SIZE ON THE COMBUSTION CHARACTERISTICS OF SEWAGE SLUDGE IN A FIXED BED

2018 ◽  
Author(s):  
Joana Freitas Campana ◽  
Kaio Pandolfi Pessotti ◽  
Carlos Eduardo Silva Abreu ◽  
Patrick de Jesus
Keyword(s):  
Particle Size ◽  
Sewage Sludge ◽  
Fixed Bed ◽  
Combustion Characteristics ◽  
Effect Of Moisture

Estimation of Energy Saving for Melting Process on Sewage Sludge

1991 ◽  
Vol 23 (10-12) ◽  
pp. 2011-2018 ◽  
Author(s):  
T. Murakami ◽  
K. Sasabe ◽  
K. Sasaki ◽  
T. Kawashima
Keyword(s):  
Sewage Sludge ◽  
Moisture Content ◽  
Energy Saving ◽  
Fuel Consumption ◽  
Melting Process ◽  
System Operation ◽  
Operational Conditions ◽  
Volatile Solids ◽  
Cake Moisture ◽  
Very High

The possible volume reduction and stabilization of the sewage sludge associated with the melting process are expected to be greater than with the incineration process. In addition, melted slag can be utilized. However, since the melting process requires a very high temperature to melt inorganics (ash) in the sludge, the technologies to minimize energy consumption, to establish system operation and to prolong durability of facilities should be developed. This paper discusses the auxiliary fuel consumption as follows.(1)Preparation of a model that provides the auxiliary fuel consumption of the melting system on the basis of the mass and heat balances.(2)Evaluation of the auxiliary fuel consumption in the above model using the cake moisture content, the volatile solids of the cake, the dried cake moisture content and the melting temperature as parameters.(3)Examination of the operational conditions for an energy saving melting system based on the results of (1) and (2) above.

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