Emission characteristics of toxic pollutants from an updraft fixed bed gasifier for disposing rural domestic solid waste

2017 ◽  
Vol 24 (24) ◽  
pp. 19807-19815 ◽  
Author(s):  
Ming Lei ◽  
Jing Hai ◽  
Jiang Cheng ◽  
Li Gui ◽  
Jiawei Lu ◽  
...  
Keyword(s):  
Solid Waste ◽  
Fixed Bed ◽  
Emission Characteristics ◽  
Toxic Pollutants ◽  
Domestic Solid Waste

scholarly journals Fixed bed pyrolysis of biomass solid waste for bio-oil

2017 ◽  
Author(s):  
Mohammad Nurul Islam ◽  
Mohamed Hairol Md Ali ◽  
Miftah Haziq
Keyword(s):  
Solid Waste ◽  
Fixed Bed ◽  
Bio Oil ◽  
Pyrolysis Of Biomass

scholarly journals Analysis on the MSW thermal degradation processes

2013 ◽  
Vol 9 (1) ◽  
pp. 57-62
Keyword(s):  
Thermal Degradation ◽  
Municipal Solid Waste ◽  
Solid Waste ◽  
Degradation Kinetics ◽  
Variable Temperature ◽  
Fixed Bed ◽  
Reduction Rate ◽  
Pollutant Emissions ◽  
Process Conditions ◽  
Degradation Processes

The waste to renewable energy source has become a priority in the wastes treatment field. The research goal is not only the wastes destruction but also a better thermal energy recovery from the processes. The municipal solid waste presents a high heterogeneity degree from the dimensional point of view, form and its components specific weight of as well as thermal-chemical characteristics. That’s why there are many treatment methods, each one with its own particularities. For a better understanding of the phenomenon during thermal degradation processes both under pyrolysis or atmospheric pressure gasification stages we first accomplished a laboratory scale series of experiments in a tubular reactor, on small quantities (5 – 10 grams) of reconstituted urban wastes. For the validation of the obtained data on more representative samples we extended the experiment to an original industrial scale pilot installation that enables the continuous thermal treatment of 10 – 50 waste kilograms per hour under oxidant or non-oxidant atmosphere (on choice) and at variable temperature between 400 °C – 1100 ºC. The residential time of the treated sample in the installation and the flow conditions can be set independently. The installation reproduces the incinerators or the pyrolysis / gasification reactor process conditions and provides complete information on the wastes thermal degradation kinetics and on the pollutant emissions. The particularity of the device consists in the product advancing piston – like flow system based on the bed vibration. The product particles in the bed have a translation movement without any layer shift. Therefore the particles distribution in a given product bed section is the same all along the installation from the feeding inlet to the extraction. That characteristic enables us to extrapolate and compare the laboratory results of the fixed bed treatment to the industrial pilot continuously treatment applied on the same product: reconstituted municipal solid waste, one of the most heterogynous solid wastes in mixture. The main targets were the sample mass reduction rate, the resulting gases composition, the samples mechanical behavior for different temperature levels, residential time, treatment atmosphere conditions and different steam flow rates (in the gasification process). The results were compared to an established reference – the incineration. The paper presents the research and results on the degradation mechanisms of MSW treated samples in those two equipments from the Science Division CNRS, Department of Industrial Methods, University of Technology Compiègne, France.

scholarly journals Estimation of Domestic Solid Waste Amount and Its Required Landfill Volume in Najaf Governorate, Iraq for the Period 2015-2035

Engineering ◽  
2016 ◽  
Vol 08 (06) ◽  
pp. 339-346 ◽  
Author(s):  
Mohammad A. Al-Anbari ◽  
Mohanad Y. Thameer ◽  
Nadhir Al-Ansari ◽  
Sven Knutsson
Keyword(s):  
Solid Waste ◽  
Domestic Solid Waste

scholarly journals Association Between Occupational Exposure to Domestic Solid Waste and Dental Caries: A Cross Sectional Study

2021 ◽  
Author(s):  
Mariana Andrade ◽  
Nara Araujo ◽  
Maria Isabel Vianna ◽  
Maria Cristina Cangussu ◽  
Isaac Gomes-Filho ◽  
...  
Keyword(s):  
Occupational Exposure ◽  
Solid Waste ◽  
Direct Contact ◽  
Dental Health ◽  
Cross Sectional Study ◽  
Sectional Study ◽  
Missing Teeth ◽  
Cross Sectional ◽  
Dmft Index ◽  
Domestic Solid Waste

Abstract This cross-sectional study evaluated the dental caries and its associated factors among domestic waste collectors. A total of 301 adult men who worked for a waste collection corporation were included; 171 men worked in direct contact with domestic solid waste and 130 did not. Sociodemographic data, working and medical history were assessed. The decayed, missing, and filled permanent teeth (DMFT) index was examined. Logistic regression analysis was used to identify factors associated with dental status with a significance level of 5%. The overall mean DMFT score was 8.36 ± 5.64. The mean DMFT, missing teeth (MT), and filled teeth (FT) were significantly higher in workers who did not have any direct contact with waste (p ≤ 0.04). In the logistic analysis, DMFT ≥ 8 was only associated with older age (OR = 8.41 [95% confidence interval (95%CI), 5.01–14.12], p < 0.001). Decayed teeth (DT) ≥ 2 was associated with no previous oral hygiene instruction (OR = 2.70 [1.50–4.81], p = 0.001) and no daily dental flossing (OR = 4.26 [1.92–9.43], p < 0.001). MT ≥ 9 was associated with lower education level (OR = 3.33 [1.57–7.10], p = 0.002). FT ≥ 3 had a negative association with low income (OR = 0.42 [0.25–0.70], p < 0.001) and no daily flossing (OR = 0.42 [0.23–0.76], p = 0.004). Occupational exposure to domestic solid waste was not associated with poor dental status. Instead, age, education, income level, and oral hygiene were associated with dental health status. Missing teeth constituted the major component of the DMFT index. Therefore, prevention and oral rehabilitation programs are necessary to improve dental health.

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