scholarly journals Evaluation of energy potential of Municipal Solid Waste from African urban areas

2015 ◽  
Vol 50 ◽  
pp. 1269-1286 ◽  
Author(s):  
N. Scarlat ◽  
V. Motola ◽  
J.F. Dallemand ◽  
F. Monforti-Ferrario ◽  
Linus Mofor
Keyword(s):  
Municipal Solid Waste ◽  
Solid Waste ◽  
Urban Areas ◽  
Energy Potential

Hybrid model for the prediction of municipal solid waste generation in Hangzhou, China

2019 ◽  
Vol 37 (8) ◽  
pp. 781-792
Author(s):  
Zhenying Zhang ◽  
Yuxiang Zhang ◽  
Dazhi Wu
Keyword(s):  
Municipal Solid Waste ◽  
Solid Waste ◽  
Hybrid Model ◽  
Urban Areas ◽  
Waste Treatment ◽  
Percentage Error ◽  
Waste Generation ◽  
Population Total ◽  
The Future ◽  
The Individual

Accurate prediction of municipal solid waste (MSW) generation is necessary for choosing appropriate waste treatment methods and for planning the distribution of disposal facilities. In this study, a hybrid model was established to forecast MSW generation through the combination of the ridge regression and GM(1,N) models. The hybrid model is multivariate and involves total urban population, total retail sales of social consumer goods, per capita consumption expenditure of urban areas, tourism, and college graduation. Compared with the constituent models alone, the hybrid model yields higher accuracy, with a mean absolute percentage error (MAPE) of only 2.59%. Through weight allocation and optimal treatment of residuals, the hybrid model also balances the growth trends of the individual models, making the prediction curve smoother. The model coefficients and correlation analysis show that population, economics, and educational factors are influential for waste generation. MSW output in Hangzhou will gradually increase in the future, and is expected to reach 5.12 million tons in 2021. Results can help decision makers to develop the measures and policies of waste management in the future.

scholarly journals Assessment of Municipal Solid Waste Management System in a Developing Country

2014 ◽  
Vol 2014 ◽  
pp. 1-11 ◽  
Author(s):  
A. Ahsan ◽  
M. Alamgir ◽  
M. M. El-Sergany ◽  
S. Shams ◽  
M. K. Rowshon ◽  
...  
Keyword(s):  
Waste Management ◽  
Municipal Solid Waste ◽  
Solid Waste ◽  
Urban Areas ◽  
Management System ◽  
Solid Waste Management ◽  
Solid Wastes ◽  
Municipal Solid Waste Management ◽  
Management Concept ◽  
The City

This study represents a few basic steps of municipal solid waste management practiced in the six major cities of Bangladesh, namely, Dhaka, Chittagong, Khulna, Rajshahi, Barisal, and Sylhet. A six-month field study was conducted to identify the solid wastes management steps such as storage at source, separation, on-site storage, collection, transportation, treatment, reuse, recycling, and ultimate disposal. This study addresses the role of the city authority to meet the demand of the city dwellers in solving this emerging socioenvironmental issue and the initiatives taken by some nongovernmental organizations and community based organizations. The problems and constraints of the solid wastes management system are also identified to find a sustainable management concept for the urban areas of Bangladesh.

scholarly journals Solid Fuel from Oil Palm Biomass Residues and Municipal Solid Waste by Hydrothermal Treatment for Electrical Power Generation in Malaysia: A Review

2019 ◽  
Vol 11 (4) ◽  
pp. 1060 ◽  
Author(s):  
Norfadhilah Hamzah ◽  
Koji Tokimatsu ◽  
Kunio Yoshikawa
Keyword(s):  
Municipal Solid Waste ◽  
Solid Waste ◽  
Hydrothermal Treatment ◽  
Solid Fuel ◽  
Oil Palm ◽  
Electricity Generation ◽  
Palm Kernel ◽  
Value Added ◽  
Energy Potential ◽  
Coal Consumption

Malaysia generated 156,665 gigawatt-hours (GWh) of electricity in 2016 of which the biggest share of 48.4% was sourced from coal and coke. Malaysia coal consumption was met by 90.5% of imported coal due to high demand from the power sector. Malaysia also has a vast biomass resource that is currently under-utilised for electricity generation. This paper reviews the potential of oil palm residues and municipal solid waste (MSW) for alternative coal replacement employing hydrothermal treatment (HTT). In 2017, about 51.19 million tonnes (Mt) of oil palm waste was available with 888.33 peta-joule (PJ) energy potential to generate 88.03 terawatt-hours (TWh) electricity from oil palm fronds (OPF) and oil palm trunks (OPT), empty fruit bunch (EFB), mesocarp fibre (MF), palm kernel shell (PKS) and palm oil mill effluent (POME). Meanwhile, the MSW energy potential and electricity generation potential was estimated at 86.50 PJ/year and 8.57 TWh/year, respectively. HTT with washing co-treatment eliminates the use of drying for converting range of biomass and MSW into clean solid fuel known as hydrochar. The hydrochar increased in caloric value with lower moisture, Potassium (K) and Chlorine (Cl) contents. These value-added fuels can be used as coal alternative and reduce dependency on imported coal for energy security in Malaysia.

Seasonal characterisation of municipal solid waste from Astana city, Kazakhstan: Composition and thermal properties of combustible fraction

2019 ◽  
Vol 37 (12) ◽  
pp. 1271-1281 ◽  
Author(s):  
Bexultan Abylkhani ◽  
Berik Aiymbetov ◽  
Almira Yagofarova ◽  
Diyar Tokmurzin ◽  
Christos Venetis ◽  
...  
Keyword(s):  
Seasonal Variation ◽  
Municipal Solid Waste ◽  
Solid Waste ◽  
Winter Season ◽  
Calorific Value ◽  
Capital City ◽  
Waste To Energy ◽  
Energy Potential ◽  
Waste Composition ◽  
Different Seasons

This study presents the results of a seasonal municipal solid waste composition campaign, that took place over the period of September 2017 to June 2018 in the capital city of Kazakhstan, Astana. Four sampling campaigns were conducted in order to identify the seasonal variation of municipal solid waste composition, recyclables and energy potential materials, such as combustible fraction, useful for the evaluation of waste-to-energy potential. The combustible fraction was analysed for thermal fuel properties, such as proximate and elemental analyses and gross calorific value. The results over the four different seasons showed that the average recyclable fraction of municipal solid waste on a wet basis of 33.3 wt.% and combustibles fraction was 8.3 wt.%. The largest fraction was the organics (47.2 wt.%), followed by plastic (15.4 wt.%) and paper (12.5 wt.%). Small seasonal variations were observed for organics, paper, plastic and glass fractions. The highest values were found in summer for the organic waste, in spring for paper and plastic and autumn for glass. The recyclables fraction showed an absolute seasonal variation of 5.7% with a peak in the winter season (35.4%) and the combustibles fraction showed a seasonal variation between 8.3 wt.% to 9.4 wt.%. Finally, the average calorific value of the combustible fraction was estimated to be 21.6 MJ kg-1 on a dry basis.

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