An economic analysis of small-scale technologies for palm oil extraction in Central and West Africa

1990 ◽  
Vol 18 (3) ◽  
pp. 455-476 ◽  
Author(s):  
Eric L. Hyman
2014 ◽  
Vol 47 (2) ◽  
pp. 49-59 ◽  
Author(s):  
Bassel El Khatib ◽  
Ludek Sisak

Abstract Agriculture and forestry remain the leading sectors in Cameroon, accounting for some 36% of the merchandise exports and for more than 40% of GDP in 1998/99. Agriculture alone accounts for more than 30% of GDP and provides employment for about 68% of the active population. The Cameroon government and industry stakeholders have continuingly expressed concern about the impact of rising food import on the local industries and the rural communities especially as vegetable oils, particularly the palm oil, has a vital role to play not only as nutritional source for the Cameroon population, but for their contribution to rural incomes and employment opportunities. Particularly, Cameroon government is expecting a significant progress in implementation of new oil extraction technology where mainly in the palm oil processing technology the value added chain in this commodity is expected. Cameroon’s oil palm industry still plays a significant role in the national economy, providing oil for house hold consumption, industrial use as well as employment for thousands of Cameroonians who are engaged in production, processing and marketing. This project aims at bringing clarity on to what extent the up to date oil extraction processing technology installed in a concrete rural district, and under a clear management and regulatory structure and environment, outperforms in terms of productivity (tons of palm oil produced), quality (price of the crude palm oil) and income generation, the existing traditional manual processing palm oil producing system. The methodology applied within this study consists of comparing key indicators across populations of small scale palm oil processors in interaction with traditional non sophisticated technology with different work environment, production capacity, socio-economic status and income levels (cross-sectional statistical analysis)


Author(s):  
Krit Somnuk ◽  
Jarernporn Thawornprasert ◽  
Pin Chanjula ◽  
Gumpon Prateepchaikul

In the small-scale dry oil extraction from palm fruit used by palm oil mills, mixed crude palm oil (MCPO) is extracted using a single screw press. The oil palm meal (OPM) by-product can be used as alternative feed for ruminants. Three parameters in further solvent extraction of oil are the ethanol-to-dried oil palm meal (DOPM) ratio (4.9–30.1 g.g-1), the extraction time (0.2–18.8 min), and the speed of stirrer (48–552 rpm). These parameters were optimized to for maximum oil yield by response surface methodology (RSM) while employing hydrous ethanol as the solvent. In our laboratory-scale oil extraction, the maximal experimental yield was 10.27 wt.% under the recommend condition: 20.1 g.g-1 ethanol-to-DOPM ratio, 11 min extraction time, and 300 rpm speed of stirrer. Moreover, prototype-scale oil extraction was tested with recirculated miscella for effects of the number of cycles on oil extraction from fresh DOPM. The results showed approximately 17.4 wt.% oil yield from 5000 g DOPM at the conditions recommended based on laboratory-scale experiments. In this study, recirculated miscella was used to extract oil from fresh DOPM. The first four cycles of oil extraction were almost as efficient as with fresh ethanol. Moreover, the protein content in the defatted oil palm meal (DFOPM) improved with oil extraction, because residual oil in DOPM was removed. The DFOPM should have less rancidity and longer shelf-life than DOPM.


2021 ◽  
Vol 9 (4) ◽  
pp. 1969-1969
Author(s):  
Bosong Lin ◽  
Theodore Wiesner ◽  
Mahdi Malmali

Author(s):  
Muhammad Firdaus ◽  
S M Salleh ◽  
I. Nawi ◽  
Z. Ngali ◽  
W.A. Siswanto ◽  
...  

2008 ◽  
Author(s):  
Q. S. Yin ◽  
H. Y. Li ◽  
Q. H. Fan ◽  
L. X. Jia ◽  
J. G. Weisend ◽  
...  

1974 ◽  
Vol 15 (3) ◽  
pp. 417-432 ◽  
Author(s):  
John C. Yoder

Analysis of eighteenth- and nineteenth-century Dahomean history reveals, not the existence of an absolute despotism, but the presence of a complex and institutionalized political process responsive to the needs and demands of Dahomeans from every part of the country. Each year at Xwetanù (Annual Customs), Dahomean officials met to discuss and decide administrative, military, economic, and diplomatic policies of the nation. In the mid-nineteenth century an obvious polarization developed as two groups, the Elephant Party and the Fly Party, sought to mould foreign policy. The Elephant Party, composed of the Crown, the wealthiest Creole traders, and the highest male military officials, advocated continuing the established practice of capturing and exporting slaves. Therefore, the Elephant Party wanted to destroy Abeokuta, an African rival and threat to slave raiding, and to resist England, a European obstacle to the trans-Atlantic shipment of slaves. After 1840, as slaving became more difficult and as the palm oil trade emerged as an alternative to the slave trade, the Fly Party rose to challenge the goals of the Elephant Party. Comprised of the Amazon army, shrine priests, middle-level administrators, Dahomean entrepreneurs, and trade officials (groups who were unwilling to pay the costs of a major war and who were eager to gain access to the profits of ‘legitimate’ international trade), the Fly Party counselled peaceful co-existence with Abeokuta and restored commercial relations with England. Eventually, the Fly Party was able to gain ascendancy over the Elephant Party. By 1870 the great Creole traders had suffered severe economic reverses, the Crown and the high military officers were divided over the question of Abeokuta, and members of the Fly Party had obtained positions of political and economic dominance within the country. Thus, the economic and military transformations which affected all of West Africa in the first half of the nineteenth century evoked political polarizations, coalitions, and realignments in the nation of Dahomey.


2016 ◽  
Vol 2016 ◽  
pp. 1-12 ◽  
Author(s):  
Ivan Mašín ◽  
Michal Petrů

One of important sources of biomass-based fuel isJatropha curcasL. Great attention is paid to the biofuel produced from the oil extracted from theJatropha curcasL. seeds. A mechanised extraction is the most efficient and feasible method for oil extraction for small-scale farmers but there is a need to extract oil in more efficient manner which would increase the labour productivity, decrease production costs, and increase benefits of small-scale farmers. On the other hand innovators should be aware that further machines development is possible only when applying the systematic approach and design methodology in all stages of engineering design. Systematic approach in this case means that designers and development engineers rigorously apply scientific knowledge, integrate different constraints and user priorities, carefully plan product and activities, and systematically solve technical problems. This paper therefore deals with the complex approach to design specification determining that can bring new innovative concepts to design of mechanical machines for oil extraction. The presented case study as the main part of the paper is focused on new concept of screw of machine mechanically extracting oil fromJatropha curcasL. seeds.


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