Characterization of rice husk varieties in Uganda for biofuels and their techno-economic feasibility in gasification

Olupot, Peter Wilberforce; Candia, Alphonse; Menya, Emmanuel; Walozi, Ronald

doi:10.1016/j.cherd.2015.11.010

Cited by 57 publications

(23 citation statements)

References 21 publications

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“…[80] Investigated the characteristics of rice husk from varieties of rice and the benefits of power generation using rice husk compared to a diesel generator. [81] Investigated the experimental statistics of air-staged cyclone gasification of rice crops. [82] Studied the role of different parameters on the gasification performance using rice husk biomass in power generation plant.…”

Section: Gasificationmentioning

confidence: 99%

Potential of Rice Industry Biomass as a Renewable Energy Source

et al. 2019

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Fossil fuel depletion, along with its ever-increasing price and detrimental impact on the environment, has urged researchers to look for alternative renewable energy. Of all the options available, biomass presents a very reliable source due to its never-ending supply. As research on various biomasses has grown in recent years, waste from these biomasses has also increased, and it is now time to shift the focus to utilizing these wastes for energy. The current waste management system mainly focuses on open burning and soil incorporation as it is cost-effective; however, these affect the environment. There must be an alternative way, such as to use it for power generation. Rice straw and rice husk are examples of such potential biomass waste. Rice is the main food source for the world, mostly in Asian regions, as most people consume rice daily. This paper reviews factors that impact the implementation of rice-straw-based power plants. Ash content and moisture content are important properties that govern combustion, and these vary with location. Logistical improvements are required to reduce the transport cost of rice husk and rice straw, which is higher than the transportation cost of coal.

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Section: Gasificationmentioning

confidence: 99%

Potential of Rice Industry Biomass as a Renewable Energy Source

et al. 2019

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“…The major by-products from sugar factories are; bagasse, molasses and Filter press cake [12]. According to [13] it was reported that the production of paddy rice increased from about 120,000 tons in 2002 to more than 220,000 tons in 2011 and that on average, 20% of the paddy rice is husk implying that 44,000 tons of husks were produced in 2011 alone.…”

Section: By-products From Agricultural Production and Processingmentioning

confidence: 99%

Innovations in Value-Addition of Agricultural By-Products in Uganda

Nsubuga¹,

Banadda²,

Kiggundu³

2019

JEP

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The purpose of this review was to profile the existing innovations in the value addition of agricultural by-products and suggest innovations that could yield more value-added products from the available agricultural by-products in Uganda. These by-products were from crops, livestock, fish and forestry sub-sectors. The review indicated 7.8 million tons from the crops' subsector, 6.69 million skins and hides, 2280 million tons of cow dung and 390,550 tons of chicken dung from the livestock subsector, 36,000 tons from the fish subsector and 440,000 m 3 of sawdust and offcuts from the forestry sub-sector. Current innovations in value-addition of agricultural by-products included the making of briquettes, organic fertilizers, biogas, biochar, pellets and organic pesticides from the crop subsector. Cow dung from the livestock is used for plastering walls of houses, used as fertilizer and used for the production of biogas. Chicken droppings are as well used as fertilizer and for production of biogas. Fish frames and skins are mainly consumed in smoked form whereas trimmings are usually rolled into fish balls and then fried for people to eat while the fats are used for frying the fish balls. Sawdust has been mixed with cement to make wood-cement composite bricks that reduce the overall weight of the building. It is also being used as feed in the Indigenous MicroOrganisms (IMO) technology in the production of pigs. Proposed innovations include the use of bones to produce soft tissue, buttons, knife handles and bone meal. Blood can be used in making adhesives and fertilizers while fish oil is a major dietary source of long chain omega-3 polyunsaturated fatty acids and so can be utilized to enrich different food products.

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“…The low emissions of cellulosic biofuels has been attractive, and more study has been conducted in recent years focusing on the environmental evaluation of biofuels [8][9][10][11][12][13]. In the United States (U.S.), under the Renewable Fuel Standard (RFS) program, each type of biofuel must achieve a specific reduction of greenhouse gas (GHG) emissions.…”

Section: Introductionmentioning

confidence: 99%

Life-Cycle Assessment (LCA) of Different Pretreatment and Product Separation Technologies for Butanol Bioprocessing from Oil Palm Frond

Mahmud

Rosentrater

2019

Energies

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Environmental impact assessment is a crucial aspect of biofuels production to ensure that the process generates emissions within the designated limits. In typical cellulosic biofuel production process, the pretreatment and downstream processing stages were reported to require a high amount of chemicals and energy, thus generating high emissions. Cellulosic butanol production while using low moisture anhydrous ammonia (LMAA) pretreatment was expected to have a low chemical, water, and energy footprint, especially when the process was combined with more efficient downstream processing technologies. In this study, the quantification of environmental impact potentials from cellulosic butanol production plants was conducted with modeled different pretreatment and product separation approaches. The results have shown that LMAA pretreatment possessed a potential for commercialization by having low energy requirements when compared to the other modeled pretreatments. With high safety measures that reduce the possibility of anhydrous ammonia leaking to the air, LMAA pretreatment resulted in GWP of 5.72 kg CO 2 eq./L butanol, ecotoxicity potential of 2.84 × 10 −6 CTU eco/L butanol, and eutrophication potential of 0.011 kg N eq./L butanol. The lowest energy requirement in biobutanol production (19.43 MJ/L), as well as better life-cycle energy metrics performances (NEV of 24.69 MJ/L and NER of 2.27) and environmental impacts potentials (GWP of 3.92 kg N eq./L butanol and ecotoxicity potential of 2.14 × 10 −4 CTU eco/L butanol), were recorded when the LMAA pretreatment was combined with the membrane pervaporation process in the product separation stage.

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Characterization of rice husk varieties in Uganda for biofuels and their techno-economic feasibility in gasification

Cited by 57 publications

References 21 publications

Potential of Rice Industry Biomass as a Renewable Energy Source

Potential of Rice Industry Biomass as a Renewable Energy Source

Innovations in Value-Addition of Agricultural By-Products in Uganda

Life-Cycle Assessment (LCA) of Different Pretreatment and Product Separation Technologies for Butanol Bioprocessing from Oil Palm Frond

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