The Effectiveness of Rain Water Harvesting for Sustainable Practices in West Hararghe Zone, Oromia Regional State, Ethiopia
Dejene Teressa,
Hailu Mosisa
Issue:
Volume 6, Issue 1, March 2021
Pages:
1-11
Received:
24 November 2020
Accepted:
14 December 2020
Published:
4 January 2021
Abstract: This study was conducted in West Hararghe Zone, Oromia regional state to evaluate rain water harvesting Effectiveness for sustainable practices. The data were collected from a total 336 household selected randomly. The data’s obtained were analyzed qualitatively. The study reviled that Rain water harvesting is one of the most important means to increase agricultural productivity and source of a domestic water supply for drought prone of Western Hararghe Zones. Specifically, in selected kebeles of Miesso district there is no access of perennial spring and river. Ground water also found at very deeper and can’t be extracted by their current economic and educational status. In line with this about 83.6% of the farmers were implemented rain water harvesting practices on their farm land and communal land to minimize the risks associated with scarcity of rainfall. From these value 97.3% were in Miesso district. In agreement with this, 54.8% of the house holders have been using roof top water harvesting system in this study area. Specifically, about 25% of the respondents use roof top water harvesting system in Miesso district. Additionally, about 30.1% of the farmers were constructed family pond on their farm land for vegetable/horticultural crop production, cash crops (chat) and also for livestock. Contour ridges were implemented by 89.3% and 92.4% of the farmers in Miesso and Habro districts, respectively. Similarly, 73.8% of the respondents in the study area were implemented flood water diversion to their farm land. Accordingly, 30.8% and 20.5% of the respondents from Habro and Miesso district state preferred flooding WH system than others techniques.
Abstract: This study was conducted in West Hararghe Zone, Oromia regional state to evaluate rain water harvesting Effectiveness for sustainable practices. The data were collected from a total 336 household selected randomly. The data’s obtained were analyzed qualitatively. The study reviled that Rain water harvesting is one of the most important means to inc...
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Electrocoagulation Degradation of Oily Wastewater by Using Al-based Amorphous Alloy
Xiao Chen Xu,
Ke Qiang Qiu
Issue:
Volume 6, Issue 1, March 2021
Pages:
12-16
Received:
3 February 2021
Accepted:
10 February 2021
Published:
27 February 2021
Abstract: Oily wastewater is proven to be common both in industry and home life. A particular contaminant of concern is petroleum hydrocarbon present in various types of wastewater comingfrom shipyards, onshore and offshore industries, and engine rooms of ships. As the standards for oily wastewater treatment become more and more strict, and emulsified oil wastewater is characterized by difficult degradation and high toxicity, we adopt the electrocoagulation technology with Al86Ni10Y4 amorphous alloy as anode and graphite as cathode to treat it to surpass the limitations of conventional methods. The degradation effect on the oily wastewater was characterized by chemical demand oxygen (COD), while the ribbons before and after using were analyzed by X-ray diffraction (XRD) and scanning electron microscope (SEM) The results show that when the pH value is 3 and the current density is 6.5mA/cm2, the COD removal rate can reach to 75.68% within 100 minutes. Large areas of white corrosion products appear on the surface of the Al-based amorphous alloy after reaction. These protrusions are mainly formed by anodic oxidation corrosion of Al-based amorphous alloy. So, the electrocoagulation technology with amorphous alloy as anode and graphite as cathode is suitable for being utilized to treat the emulsified oil wastewater. And it will have a good practical application prospect.
Abstract: Oily wastewater is proven to be common both in industry and home life. A particular contaminant of concern is petroleum hydrocarbon present in various types of wastewater comingfrom shipyards, onshore and offshore industries, and engine rooms of ships. As the standards for oily wastewater treatment become more and more strict, and emulsified oil wa...
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