Research on the effect of water content and particle size on degradation of organic matter in municipal solid waste

2020 ◽

Vol 17 (1) ◽

pp. 62-74

Author(s):

Mochammad Chaerul ◽

Annisa Kusuma Wardhani

Keyword(s):

Organic Matter ◽

Municipal Solid Waste ◽

Solid Waste ◽

Water Content ◽

Biological Treatment ◽

Calorific Value ◽

Scientific Journals ◽

Research Papers ◽

Urban Waste ◽

Refuse Derived Fuel

The utilization of waste into fuel (Refuse Derived Fuel, RDF) is an alternative to overcome the problem of municipal solid waste (MSW). Many processes can be applied to produce RDF including through biodrying process. Biodrying is a part of Mechanical-Biological Treatment (MBT) aiming to reduce water content in the waste by utilizing heat generated from microorganism activities while degrading organic matter in the waste, thus the calorific value will increase. The paper aims to make a review from various research papers on biodrying process published in scientific journals, so it becomes one of reference on further research on biodrying process by considering the characteristics of waste in Indonesia. The review has been conducted by focusing on several important aspects on the research such as operation principle, reactor design configuration, parameters to be examined, and the characteristics of feed and product.

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Influence of the Granulometry of Organic Matter Ashes from Municipal Solid Waste on the Properties of Vitrified Ceramics

Materials Science Forum ◽

10.4028/www.scientific.net/msf.498-499.552 ◽

2005 ◽

Vol 498-499 ◽

pp. 552-557 ◽

Cited By ~ 2

Author(s):

Monica Castoldi Borlini Gadioli ◽

B.C. Santos ◽

R.A. Conte ◽

Daltro Garcia Pinatti ◽

Carlos Maurício Fontes Vieira ◽

...

Keyword(s):

Mechanical Properties ◽

Particle Size ◽

Organic Matter ◽

Municipal Solid Waste ◽

Water Absorption ◽

Solid Waste ◽

Mechanical Resistance ◽

Potentially Toxic Metals ◽

Flexural Resistance ◽

High Degree

This work studies the influence of the granulometry of organic matter ashes from the municipal solid waste (MOL) on the mechanical properties of vitrified ceramics. Mixtures of clay with additions of the MOL ashes were prepared as vitrified ceramics. The degree of immobilization of the potentially toxic metals (PTM) contained in the ashes was then evaluated. Samples of a sedimentary clay with 13.5% of MOL ashes with granulometry, 35 and 200 mesh, were uniaxially pressed at 18 MPa and sintered at 1200°C. Results from 3- point flexural resistance and water absorption tests showed that the reduction in the particle size of the MOL ashes increased the mechanical resistance to 45 MPa while the water absorption reached 0.8%. These results and the high degree of immobilization of the PTM qualify the ceramic vitrification as an alternative to the final disposal of the MOL.

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Process modeling of municipal solid waste compost ash for reactive red 198 dye adsorption from wastewater using data driven approaches

Scientific Reports ◽

10.1038/s41598-021-90914-z ◽

2021 ◽

Vol 11 (1) ◽

Author(s):

Mohammad Hadi Dehghani ◽

Mehdi Salari ◽

Rama Rao Karri ◽

Farshad Hamidi ◽

Roghayeh Bahadori

Keyword(s):

Organic Matter ◽

Municipal Solid Waste ◽

Solid Waste ◽

Adsorption Process ◽

Operating Time ◽

Organic Matter Content ◽

Order Kinetic ◽

Box Behnken Design ◽

Reactive Red 198 ◽

Msw Compost

AbstractIn the present study, reactive red 198 (RR198) dye removal from aqueous solutions by adsorption using municipal solid waste (MSW) compost ash was investigated in batch mode. SEM, XRF, XRD, and BET/BJH analyses were used to characterize MSW compost ash. CNHS and organic matter content analyses showed a low percentage of carbon and organic matter to be incorporated in MSW compost ash. The design of adsorption experiments was performed by Box–Behnken design (BBD), and process variables were modeled and optimized using Box–Behnken design-response surface methodology (BBD-RSM) and genetic algorithm-artificial neural network (GA-ANN). BBD-RSM approach disclosed that a quadratic polynomial model fitted well to the experimental data (F-value = 94.596 and R2 = 0.9436), and ANN suggested a three-layer model with test-R2 = 0.9832, the structure of 4-8-1, and learning algorithm type of Levenberg–Marquardt backpropagation. The same optimization results were suggested by BBD-RSM and GA-ANN approaches so that the optimum conditions for RR198 absorption was observed at pH = 3, operating time = 80 min, RR198 = 20 mg L−1 and MSW compost ash dosage = 2 g L−1. The adsorption behavior was appropriately described by Freundlich isotherm, pseudo-second-order kinetic model. Further, the data were found to be better described with the nonlinear when compared to the linear form of these equations. Also, the thermodynamic study revealed the spontaneous and exothermic nature of the adsorption process. In relation to the reuse, a 12.1% reduction in the adsorption efficiency was seen after five successive cycles. The present study showed that MSW compost ash as an economical, reusable, and efficient adsorbent would be desirable for application in the adsorption process to dye wastewater treatment, and both BBD-RSM and GA-ANN approaches are highly potential methods in adsorption modeling and optimization study of the adsorption process. The present work also provides preliminary information, which is helpful for developing the adsorption process on an industrial scale.

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Numerical Analysis of Size Reduction of Municipal Solid Waste Particles on the Traveling Grate of a Waste-to-Energy Combustion Chamber

14th Annual North American Waste-to-Energy Conference ◽

10.1115/nawtec14-3193 ◽

2006 ◽

Cited By ~ 2

Author(s):

Masato Nakamura ◽

Marco J. Castaldi ◽

Nickolas J. Themelis

Keyword(s):

Particle Size ◽

Municipal Solid Waste ◽

Combustion Chamber ◽

Solid Waste ◽

Size Reduction ◽

Waste To Energy ◽

Size Change ◽

Model Combining ◽

Shrinking Core ◽

Waste Particles

The size reduction of municipal solid waste (MSW) particles on the reverse acting traveling grate of a waste-to-energy (WTE) combustion chamber was estimated by means of a numerical model combining the particle size distributions (PSD) of MSW and combustion residues and the Shrinking Core Model (SCM). This new integrated model was used to simulate the particle behavior on the grate. During their travel on the moving grate, the sizes of the particles are reduced by combustion, breakage, and compaction. This study shows the calculation of the particle size change using this model and comparison of the numerically derived PSDs of MSW and ash particles with experimental data. There is good agreement between calculated and measured values.

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Use of Municipal Solid Waste Incineration Bottom Ash in Adsorption of Heavy Metals

Key Engineering Materials ◽

10.4028/www.scientific.net/kem.474-476.1099 ◽

2011 ◽

Vol 474-476 ◽

pp. 1099-1102

Author(s):

Hai Ying Zhang ◽

Yi Zheng ◽

Hong Tao Hu ◽

Jing Yu Qi

Keyword(s):

Heavy Metals ◽

Particle Size ◽

Municipal Solid Waste ◽

Solid Waste ◽

Residence Time ◽

Bottom Ash ◽

Waste Incineration ◽

Synthetic Wastewater ◽

High Porosity ◽

Municipal Solid Waste Incineration

Bottom ash from municipal solid waste incineration (MSWI) has been previously suggested as an adsorbent for removing heavy metals from wastewater due to its high porosity and large surface area. In this study the adsorption characteristics of heavy metals were investigated using various particle sizes of MSWI bottom ash. The adsorption experiment was conducted using synthetic wastewater containing Cu, Zn, Pb and Cd as a function of residence time, initial pH, ash dosage and particle size, respectively. The adsorption rate increased with decreasing particle size and with increasing residence time. Through the above analysis, this work proved that bottom ash was effective in adsorbing the four heavy metals.

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