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Habte, Ermias,Muktar, Meki S.,Negawo, Alemayehu T.,Lee, Sang-Hoon,Lee, Ki-Won,Jones, Chris S. The Korean Society of Grassland and Forage Science 2019 한국초지조사료학회지 Vol.39 No.3
The production of traditional cool season grasses in temperate regions is becoming hampered during summer seasons due to water deficit. Thus, incorporating water use efficient warm season annual grasses are generally considered to fill the gap of summer season forage reduction that would offer considerable flexibility and adaptability to respond to forage demand. Teff (Eragrostis teff Zuccagni) Trotter) is, a C4 drought tolerant warm season annual grass primarily grown for grain production, recently gaining interest for forage production particularly during summer season. Previous reports have showed that teff is palatable and has comparable forage biomass and feed quality as compared to other warm season annual grasses which would make it an alternative forage. However, the available data are not comprehensive to explore the potential of teff as forage, hence further assessment of genotype variability and performance along with compatibility study of teff with forage production system of specific environment is key for future utilization.
Applications of Sugarcane by-products to mitigate climate change in Ethiopia
Habte, Lulit,Mulatu, Dure,Ahn, Ji Whan The Korean Society for Energy 2018 에너지공학 Vol.27 No.3
Climate change is one of the major issues in both the developed and developing world. Greenhouse gas (GHG) emission is one of the implications for climate change. It is increasing rapidly. Although the emission is much less when compared to the rest of the world, Ethiopia has also faced this global issue. The major source for GHG emission in Ethiopia is agriculture. Therefore, the agriculture sector has to be given more attention in Ethiopia. To overcome the problem, Climate-Resilient Green Economy (CRGE) strategy has been initiated. One way of executing this target is to create a sustainable and environmentally friendly pathway to use agricultural byproducts. Sugarcane is one of the major plants in Ethiopia. Its byproducts are bagasse, molasses, and press mud. Since it is a waste product, it is economical and creates a sustainable and green environment by reducing GHG emissions. Sugarcane byproducts have versatile applications like as fuel, as cement replacing material, as a mitigation for expansive soils, as biosorbent for the treatment of water and wastewater and also as a wood material. However, Ethiopia has not used this byproduct massively as it is readily available. This paper reviews the possible applications of sugarcane byproducts to mitigate climate change.
Applications of Sugarcane by-products to mitigate climate change in Ethiopia
LULIT HABTE EKUBATSION,DURE MULATU GELETA,안지환 한국에너지학회 2018 에너지공학 Vol.27 No.3
Climate change is one of the major issues in both the developed and developing world. Greenhouse gas (GHG) emission is one of the implications for climate change. It is increasing rapidly. Although the emission is much less when compared to the rest of the world, Ethiopia has also faced this global issue. The major source for GHG emission in Ethiopia is agriculture. Therefore, the agriculture sector has to be given more attention in Ethiopia. To overcome the problem, Climate-Resilient Green Economy (CRGE) strategy has been initiated. One way of executing this target is to create a sustainable and environmentally friendly pathway to use agricultural byproducts. Sugarcane is one of the major plants in Ethiopia. Its byproducts are bagasse, molasses, and press mud. Since it is a waste product, it is economical and creates a sustainable and green environment by reducing GHG emissions. Sugarcane byproducts have versatile applications like as fuel, as cement replacing material, as a mitigation for expansive soils, as biosorbent for the treatment of water and wastewater and also as a wood material. However, Ethiopia has not used this byproduct massively as it is readily available. This paper reviews the possible applications of sugarcane byproducts to mitigate climate change.
Inhibition of Total Nitrogen Loss in Urine through Integrated Alkali Stabilization and Carbonation
Lulit Habte,Thriveni Thenepalli,안영준,Mohd Danish Khan,안지환 한국에너지학회 2022 에너지공학 Vol.31 No.3
In this paper, total nitrogen (TN) has been recovered from waste diapers through alkaline stabilization as a liquid fertilizer. Nitrogen is one of the most dominant as well as difficult key nutrients to recover from human urine. However, nitrogen can easily be lost in the form of ammonia gas by enzymatic degradation of urea. In this work, a baby diaper has been used as a source of urine which is one of the environmental burdens. The experiment started with synthesizing CaO from the waste shell used to prevent the enzymatic degradation of urea. The waste diaper was soaked in the CaO solution with desired liquid to solid ratio and stirred at 200 rpm. In the present study, three experimental parameters were investigated: CaO dosage (0.05-0.5 M), liquid/solid ratio (L/S) (5-15), and temperature (20-80 ℃). The experimental design and optimization study was conducted by response surface methodology (RSM), Box−Behnken. The urine sample was analyzed for TN before and after the alkaline stabilization process. Initially, 1068.4 mg/L of TN was present in the fresh urine obtained from the baby’s diaper. Then, the TN in the stabilized urine increased with time and reached 1631.2 mg/L in 48 hrs whereas in the original urine (without CaO), it reached 606 mg/L within 48 hrs. Moreover, the optimization result highlights that 0.05 M, 40 ℃, and 5 of CaO dosage, temperature, and L/S ratio respectively were the optimized condition for obtaining maximized nitrogen recovery that is 2048.56 mg/L that is 91% recovery. Finally, carbonation of the stabilized urine was conducted to neutralize the pH of the liquid fertilizer solution. Enzymatic urea hydrolysis was not observed although the pH of the stabilized urine was lowered to neutral.
Girum Habte,최지연,노은영,오상열,Naeem Khan,최훈,박경수,김경수 한국식품과학회 2015 Food Science and Biotechnology Vol.24 No.1
Toxic metal concentrations, including lead (Pb), cadmium (Cd), aluminum (Al), mercury (Hg), and arsenic (As) in edible tissues of different species of shrimp and shellfish consumed in South Korea were analyzed. Analysis was performed using inductively coupled plasma (ICP)- MS) for Pb, Cd and As, ICP-optical emission spectrometry (OES) for Al, and a direct mercury analyzer for Hg. Methods used were validated. Limited variation in heavy metal concentrations between shrimp and shellfish were observed. Al and As concentrations were highest while Hg was lowest. Heavy metal levels found in edible tissues of shellfish and shrimp were below international and local maximum permissible levels for human consumption. The methods used were accurate and reproducible for use in determination of toxic heavy metal levels in seafoods.