Investigation of Agro-concrete using by-products of Rice Husk in Mekong Delta of Vietnam

Son, Nguyen Khanh; Toan, Nguyen Phung Anh; Dung, Trần Thị; Huynh, Nguyen Ngoc Tri

doi:10.1016/j.proeng.2017.01.421

Cited by 12 publications

(8 citation statements)

References 9 publications

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“…In addition, rice husk is known as a by-product of rice production, accounting for 20% of rice yields (Chungsangunsit et al, 2009). It is estimated that VMD annually produces around 1.9 million tons of rice husk (Son et al, 2017). Biomass (hardwood and crop residues) are often used as typical feedstock for making biochar pyrolysis owing to their multiple-porous structure (Nguyen et al, 2018;, which facilitates the multifunctional purposes of soil amendment and pollutant remediation.…”

Section: Introductionmentioning

confidence: 99%

Rice husk and melaleuca biochar additions reduce soil CH4 and N2O emissions and increase soil organic matter and nutrient availability

Thao

Huu

et al. 2021

F1000Res

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Background: Biochar is a promising material in mitigating greenhouse gases (GHGs) emissions from paddy fields due to its remarkable structural properties. Rice husk biochar (RhB) and melaleuca biochar (MB) are amendment materials that could be used to potentially reduce emissions in the Vietnamese Mekong Delta (VMD). However, their effects on CH4 and N2O emissions and soil under local water management and conventional rice cultivation have not been thoroughly investigated. Methods: We conducted a field experiment using biochar additions to the topsoil layer (0-20 cm). Five treatments comprising 0 t ha-1 (CT0); 5 t ha-1 (RhB5) and 10 t ha-1 (RhB10), and 5 t ha-1 (MB5) and 10 t ha-1 (MB10) were designed plot-by-plot (20 m2) in triplicates. Results: The results showed that biochar application from 5 to 10 t ha-1 significantly decreased cumulative CH4 (24.2 – 28.0%, RhB; 22.0 – 14.1%, MB) and N2O (25.6 – 41.0%, RhB; 38.4 – 56.4%, MB) fluxes without a reduction in grain yield. Increasing the biochar application rate further did not decrease significantly total CH4 and N2O fluxes but was seen to significantly reduce the global warming potential (GWP) and yield-scale GWP in the RhB treatments. Biochar application improved soil Eh but had no effects on soil pH. Whereas CH4 flux correlated negatively with soil Eh (P < 0.001; r2 = 0.552, RhB; P < 0.001; r2 = 0.502, MB). The soil physicochemical properties of bulk density, porosity, organic matter, and anaerobically mineralized N were significantly improved in biochar-amended treatments, while available P also slightly increased. Conclusions: Biochar supplementation significantly reduced CH4 and N2O fluxes and improved soil mineralization and physiochemical properties toward beneficial for rice plant. The results suggest that the optimal combination of biochar-application rates and effective water-irrigation techniques for soil types in the MD should be further studied in future works.

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Section: Introductionmentioning

confidence: 99%

Rice husk and melaleuca biochar additions reduce soil CH4 and N2O emissions and increase soil organic matter and nutrient availability

Thao

Huu

et al. 2021

F1000Res

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“…With low thermal conductivity (approx. 0.27 W/mK) (Son et al, 2017) these bio-bricks can be effectively used in walls as they provide good insulation to heat and sound. Due its porosity and low density these bio-bricks helps in maintaining humidity of the buildings, making these houses suitable for hot-humid climate like India (Walker and Pavía, 2014).…”

Section: Discussion Of Application Benefits and Limitations Of Bio-bricksmentioning

confidence: 99%

Bio-Brick - Development of Sustainable and Cost Effective Building Material

Rautray

Roy

Mathew

et al. 2019

Proc. Int. Conf. Eng. Des.

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Building construction is one of the fastest growing industries in India and it puts a huge burden on its limited natural resources. Fired clay bricks are one of the major constituent materials for the construction industry and it produces a huge amount of greenhouse gases. This research tries to highlight the use of alternative materials and how they can be modulated to suit the Indian construction industry. Bio-brick or agro-waste based brick is one such material that has the potential to be a sustainable and cost-effective solution. It acts as good heat and sound insulator and at the same time has overall negative carbon footprint. Additionally, it also acts as a deterrent to stubble burning, prevalent in northern India which causes severe air pollution. Due to its low density, it reduces dead load in high rise structures, thereby making RCC construction more economical. The study also highlights the use of Bio-brick in various areas of a structure. Another important objective of this research is to inspire and motivate architects, designers, researchers and builders to encourage and support the development of such sustainable and eco-sensitive material in construction industry.

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“…In addition, rice husk is known as a by-product of rice production, accounting for 20% of rice yields ( Chungsangunsit et al ., 2009 ). It is estimated that VMD annually produces around 1.9 million tons of rice husk ( Son et al , 2017 ). Biomass (hardwood and crop residues) are often used as typical feedstock for making biochar pyrolysis owing to their multiple-porous structure ( Nguyen et al , 2018 ; Nan et al , 2020 ), which facilitates the multifunctional purposes of soil amendment and pollutant remediation.…”

Section: Introductionmentioning

confidence: 99%

Rice husk and melaleuca biochar additions reduce soil CH4 and N2O emissions and increase soil physicochemical properties

Thao

Huu

et al. 2022

F1000Res

View full text Add to dashboard Cite

Background: Biochar is a promising material in mitigating greenhouse gases (GHGs) emissions from paddy fields due to its remarkable structural properties. Rice husk biochar (RhB) and melaleuca biochar (MB) are amendment materials that could be used to potentially reduce emissions in the Vietnamese Mekong Delta (VMD). However, their effects on CH4 and N2O emissions and soil under local water management and conventional rice cultivation have not been thoroughly investigated. Methods: We conducted a field experiment using biochar additions to the topsoil layer (0-20 cm). Five treatments comprising 0 t ha-1 (CT0); 5 t ha-1 (RhB5) and 10 t ha-1 (RhB10), and 5 t ha-1 (MB5) and 10 t ha-1 (MB10) were designed plot-by-plot (20 m2) in triplicates. Results: The results showed that biochar application from 5 to 10 t ha-1 significantly decreased cumulative CH4 (24.2-28.0%, RhB; 22.0-14.1%, MB) and N2O (25.6-41.0%, RhB; 38.4–56.4%, MB) fluxes without a reduction in grain yield. Increasing the biochar application rate further did not decrease significantly total CH4 and N2O fluxes but was seen to significantly reduce the global warming potential (GWP) and yield-scale GWP in the RhB treatments. Biochar application improved soil Eh but had no effects on soil pH. Whereas CH4 flux correlated negatively with soil Eh (P < 0.001; r2 = 0.552, RhB; P < 0.001; r2 = 0.502, MB). Ameliorating soil aeration and functions by adding RhB and MB resulted in improving soil physicochemical properties, especially significant SOM and AN boosting, which indicate better soil health, structure, and fertility. Conclusions: Biochar supplementation significantly reduced CH4 and N2O fluxes and improved soil mineralization and physicochemical properties toward beneficial for rice plants. The results suggest that the optimal combination of biochar-application rates and effective water-irrigation techniques for soil types in the MD should be further studied in future works.

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Investigation of Agro-concrete using by-products of Rice Husk in Mekong Delta of Vietnam

Cited by 12 publications

References 9 publications

Rice husk and melaleuca biochar additions reduce soil CH4 and N2O emissions and increase soil organic matter and nutrient availability

Rice husk and melaleuca biochar additions reduce soil CH4 and N2O emissions and increase soil organic matter and nutrient availability

Bio-Brick - Development of Sustainable and Cost Effective Building Material

Rice husk and melaleuca biochar additions reduce soil CH4 and N2O emissions and increase soil physicochemical properties

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