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- 저자 : Komakech Allan John (검색결과 3 건)
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Rubagumya Isaac,Komakech Allan John,Menya Emmanuel,Kizito Simon,Zziwa Ahamada,Kabenge Isa 한국농업기계학회 2023 바이오시스템공학 Vol.48 No.2
Purpose Given their perishable nature, fruits and vegetables (FVs) are lost along the supply chain in most developing countries such as Uganda. This is mainly due to various reasons including a lack of refrigerated transport systems, poor road conditions, and a lack of cold storage facilities. The objective of this study was to quantify and analyze the current level of nutritional and economic losses for selected FV supply chains in Uganda. Methods Losses along the supply chains of four major FVs (bananas, tomatoes, potatoes, and mangoes) produced and consumed in Uganda, were assessed. A predetermined quantity of FVs was sorted at each stage of the supply chain to determine the amount of FV wastage. Samples were collected and analyzed using proximate analysis for moisture content, Nitrogen (N), Phosphorous (P), and Potassium (K) content to quantify the nutritional losses. Results The cumulative produce loss from farm to market was 19.8, 27.6, 34.1, and 39.3% for potato, mango, banana, and tomato, respectively. Nutrient loss ranged from 4.31% (P) to as high as 20.76% (N). The economic loss of each FV category studied increased along the supply chain and was observed to be highest in bananas (USD 183.4 per ton). Conclusion Overall, the findings showed significant postharvest FV loss along the supply chain, mainly during the transport between farms and markets. The information obtained from this study will help supply chain actors, regulatory bodies, stakeholders, and policymakers to analyze existing scenarios regarding FV postharvest losses and as a mitigation strategy promote transportation measures that reduce FV losses in Eastern Africa.
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Okori Francis,Cherotich Sam,Baidhe Emmanuel,Komakech Allan John,Banadda Noble 한국농업기계학회 2022 바이오시스템공학 Vol.47 No.1
Purpose The purpose of this study was to review the different hermetic storage (HS) systems used in Sub-Saharan Africa (SSA) and their effectiveness against the agents of storage quality deterioration. Method Relevant studies on grain HS in SSA conducted in the past two decades for effectiveness against the agents of storage losses are reviewed. Specifically, the study comprehensively reviewed the effectiveness of HS technologies against insectinduced damage and weight loss, seed germination, insect infestation, and mold and mycotoxin contamination. Traditional grain storage methods and HS technologies used in SSA are reviewed, including those suitable for smallholder farmers and traders. Future developments and modifications to HS are also discussed. Results Most grain HS studies are carried out in SSA where post-harvest storage losses are considered one of the world’s largest. Scholarly studies compared the performance of HS against traditional technologies for storage periods of up to 7 months and a few extending to 1 year or more. Commonly studied HS technologies include hermetic layered bags and grain silos. In general, HS offers superior protection against the agents of grain deterioration for long-term storage compared to conventional storage technologies. Conclusion HS technologies are highly effective in protecting stored grains from quantitative and qualitative storage losses and thus guarantee that stored grains can attract better prices and are safe and nutritious to the consumer.
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Membrane fouling control in low pressure membranes
Samuel Gyebi Arhin,Noble Banadda,Allan John Komakech,Isa Kabenge,Joshua Wanyama 대한환경공학회 2016 Environmental Engineering Research Vol.21 No.2
Conventional treatment techniques cannot meet the stringent modern water quality regulations emanating from the need to provide high quality drinking water. Therefore, a number of studies have suggested low pressure membrane filtration as a worthwhile alternative. However, a major constraint to the extensive use of this technology in low and middle income countries is the high operating and maintenance costs caused by the inherent predisposition to membrane fouling. Notwithstanding, pretreatment of feed water using techniques such as coagulation, adsorption, oxidation and bio-filtration is believed to control fouling. In this review paper, the existing scientific knowledge on membrane fouling and pretreatment techniques for controlling fouling in low pressure membranes is analyzed with the aim of providing new and valuable insights into such techniques, as well as unveiling crucial issues noteworthy for further studies. Among the techniques reviewed, coagulation was observed to be the most cost-effective and will remain the most dominant in the coming years. Although oxidants and magnetic ion exchange resins can also control fouling, the propensity of oxidants to form health treating precursors and the high economic implications of magnetic ion exchange resins will hinder their adoption in developing countries.
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