Lumber recovery from high forest tree species in selected sawmills of south-western Nigeria

Egbewole, ZT; Afuwape, MA; Ogunsanwo, O. Y.

doi:10.4314/bja.v3i2.41916

Cited by 4 publications

(9 citation statements)

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“…The specific heat of combustion values ranging between 7362kcal/kg and 8222kcal/kg ( Figures 4 and 6) as obtained in this study is within the range of values (7500kcal/kg and 8000kcal/kg) as similarly reported by Bamiyo [30]. However, Egbewole et al [14] and Tembe et al [15] in their findings reported a lower specific heat of combustion ranging from 4908.52kcal/kg to 5257.66kcal/kg and 3284kcal/kg to 3980kcal/kg respectively.…”

Section: Specific Heat Of Combustionsupporting

confidence: 89%

“…It gives a rough estimate of the heating value of a fuel and acts as the main heat generator during burning [25]. The fixed carbon as observed in this study (Figures 4 and 6) is close to the high fixed carbon content of briquette obtained by Sotannde et al [23] and Egbewole et al [14] of 85.25% and 85.95% respectively. According to Sotannde et al [23], it is expected that the high fixed carbon and its smokeless flame will enhance the heat value and combustion duration of briquette.…”

Section: Fixed Carbonsupporting

confidence: 88%

“…The briquette produced from groundnut shell had poor compaction and agglomeration at higher starch level which contributed to its higher significant effect on density (Figure 1). This assertion contradicts the report of Egbewole et al [14] on poor agglomeration of briquette at lower starch levels of 10% and 15% for wood sawdust. The implication of this is that particle sizes and type have great influence on density of briquettes as similarly observed by Aina et al [17].…”

Section: Relaxed Densitycontrasting

confidence: 83%

“…and 62.91% compared to a lower value of 31.2% and 33.5% for briquettes made from maize cob in this present study (Figures 3 and 5). Conversely, Egbewole et al [14] and Sotannde et al [23] reported a lower volatile matter for briquettes made from wood sawdust (13.89% to 19.33%) and neem-wood residues (10% to 13%) respectively.…”

Section: Volatile Mattermentioning

confidence: 94%

“…The starch binder at different levels of 15%, 20% and 25% [14,15] was prepared with 250ml boiled water, stirred and mixed with measured (Plate 1d) grams of separate particles singly and combined (at a mixing proportion of 50:50). The homogenously mixed stock was poured into the fabricated briquette moulder (Plate 1e) and compressed using hydraulic jack (Plate 1f).…”

Section: Sample Preparation Proceduresmentioning

confidence: 99%

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Performance Evaluation of the Physical and Combustion Properties of Briquettes Produced from Agro-Wastes and Wood Residues

Falemara¹,

Joshua²,

Aina³

et al. 2018

Preprint

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This study investigated the physical and combustion properties of briquettes produced from agricultural wastes (groundnut shells and corn cobs), wood residues (Anogeissus leiocarpus) and admixtures of the particles at 15%, 20% and 25% starch levels (binder). A 6 x 3 factorial experiments in a Completely Randomized Design (CRD) was adopted for the study. The briquettes produced were analyzed for density, volatile matter, ash content, fixed carbon and specific heat of combustion. The result revealed that the density ranged from 0.44g/cm3 to 0.53g/cm3, while briquettes produced from groundnut shells had the highest (0.53g/cm3) significant mean density. Mean volatile matter and ash content of the briquettes ranged from 24.35% to 34.95% and 3.37% to 4.91%. A. leiocarpus and corn cobs particles had the lowest and highest ash content respectively. The briquette fixed carbon and specific heat of combustion ranged from 61.68% to 68.97% and 7362kca/kg to 8222kca/kg respectively. Briquette produced from A. leiocarpus particles had the highest specific heat of combustion. In general, briquettes produced from A. leiocarpus particles and admixture of groundnut shell and A. leiocarpus particles at 25% starch level had better quality in terms of density and combustion properties and thus suitable as environmentally friendly alternative energy source.

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Section: Specific Heat Of Combustionsupporting

confidence: 89%

Section: Fixed Carbonsupporting

confidence: 88%

Section: Relaxed Densitycontrasting

confidence: 83%

Section: Volatile Mattermentioning

confidence: 94%

Section: Sample Preparation Proceduresmentioning

confidence: 99%

See 3 more Smart Citations

Performance Evaluation of the Physical and Combustion Properties of Briquettes Produced from Agro-Wastes and Wood Residues

Falemara¹,

Joshua²,

Aina³

et al. 2018

Preprint

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Socioeconomic Impacts of Sawmill Industry on Residents. A Case Study of Ile-Ife, Nigeria

Olawuni¹,

Okunola²

2014

JEDS

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The study examined the socioeconomic impacts of sawmill industry on residents in Ile-Ife, Nigeria. Questionnaire were administered on residents living within 900 m radius of the two sawmill sites in Ile-Ife (Ondo Road and Orisunmibare). Reconnaissance survey showed that there were 914 and 723 residential buildings within 900 m radius around Ondo road and Orisunmibare sawmill sites respectively, and these were further stratified into three zones (1-300 m, 301-600 m and 601-900 m). Random sampling technique was used to select every 5th building within each stratum. Questionnaire was administered on an adult household member in each of the buildings selected; consequently, 325 households were sampled. Data obtained include: socio-economic characteristics, operational procedures and residents' perception of the impacts of sawmill activities on their sustainability. The study revealed that 61.7% of respondents living within the distance of 1-300m in the two sites earn below N5000 per month. The result of the probit model showed that sawmill industry in the two sawmill sites created significant impacts on job opportunity (0.63), domestic use for cooking (0.71), wood supply (0.58) and provision of infrastructural facilities (0.63). The study concluded that sawmilling activities contributes significantly to the economic development of residents in the study area.

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Technical efficiency of chain sawmilling in Ogun State, southwest Nigeria

Ogunsanwo¹,

Adeleye²,

Anjah³

2011

International Journal of Biological and Chemical Sciences

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Technical efficiency of chain sawmilling in terms of lumber recovery was examined in Ogun State, Nigeria. The data for this purpose were obtained from stump site wood converters otherwise known as artisanal sawyers in the State. Ninety logs from 17 families were sampled for the study. Influence of species density, saw kerfs thickness, log diameter as well as form factor on lumber recovery was examined using multiple and stepwise regression analyses. Result revealed that significant relationship exists between lumber recovery dependent variable and saw kerf thickness, log diameter, Log volume, and species density as independent variables. The study further revealed that Lumber Recovery Factor (LRF) ranges from 23.53% to 67.05% on individual log basis and a mean lumber recovery of 47% for all the sampled logs. Waste partitioning also revealed that the slabs proportion was 28.54% while sawdust and bark were 2.22% and 20.02% respectively. This study has provided a database on the efficiency of this small scale industry. Parameters such as log diameter, species density, log volume, saw kerfs thickness were found to be useful indices for predicting lumber recovery in artisanal sawing.

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Lumber recovery from high forest tree species in selected sawmills of south-western Nigeria

Cited by 4 publications

References 0 publications

Performance Evaluation of the Physical and Combustion Properties of Briquettes Produced from Agro-Wastes and Wood Residues

Performance Evaluation of the Physical and Combustion Properties of Briquettes Produced from Agro-Wastes and Wood Residues

Socioeconomic Impacts of Sawmill Industry on Residents. A Case Study of Ile-Ife, Nigeria

Technical efficiency of chain sawmilling in Ogun State, southwest Nigeria

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