Abstract
Our environment is facing serious problems of high volumes of waste generation and inadequate disposal system in worldwide particularly in developing countries. There is also lack of studies on quantification of abattoir waste and lack of workers awareness towards abattoir waste. Therefore, the purpose of the study was to estimate abattoir waste for bioenergy potential as sustainable management. A cross-sectional study was conducted in four selected abattoirs of Eastern Ethiopia from January 1st, 2018 to December 30th, 2018. The magnitude of abattoir waste composition was computed based on Aniebo mathematical computational from the actual number of slaughtered livestock. The study demonstrated that four selected abattoirs generate 1,606.403 ton of abattoir waste per year and using anaerobic digestion of about 85,139 m3/year of biogas and 111.25 ton/year of biofertilizer can be produced. The biogas or energy from the waste can replace firewood and charcoal and the expensive fossil fuels. Using Banks mathematical computation about 20,054.12 m3/year production of biogas could replace 20.56 ton/year of energy consumed by liquefied petroleum gas, kerosene, charcoal, furnace oil, petrol, and diesel in average. The current estimated biofertilizer (111.25 ton/year) from four abattoir sites can cover about 2,225 hectares/year with its advantage and efficiency of soil. When turned into cost, about $55,645 per year of price could estimate from biogas and biofertilizer. The study concluded that huge amount of biogas and dry biofertilizer yields could produce from abattoir waste through anaerobic digestion. Therefore, installing anaerobic digestion plant is recommended to ensure environmental safety and public health.
Highlights
Abattoirs are where animals such as cattle or goat or sheep and others are slaughtered in for consumption as food and it is known as slaughterhouse
The study areas are found in Eastern Ethiopia; the first three study areas are Harar Abattoir, Haramaya University Abattoir Enterprise, and Haramaya Abattoirs, which are found in Harar; Haramaya University and Haramaya Towns of about 503 km, 508 km, and 527 km, respectively, far from the national capital of Addis Ababa
The study was sought to focus on abattoir waste generation from the selected Eastern Ethiopia abattoirs, namely, Harar Abattoir, Dire Dawa Abattoir, Haramaya Abattoir, and Haramaya University Enterprise Abattoirs
Summary
Abattoirs are where animals such as cattle or goat or sheep and others are slaughtered in for consumption as food and it is known as slaughterhouse. Livestock production in abattoirs is considered a potential food for the world’s needy people, and during meat production, a huge amount of abattoir wastes are generating from them [1]. In this way, abattoir waste management is a major challenge in urban areas throughout the world. Abattoir operations produce a characteristic highly organic waste with relatively high levels of suspended solid, liquid, and fat [4]. These countries are the worst of it given the deficient waste management programs [5]. As FAO [1] reported, these are dumped as solid abattoir wastes without any further processing or composting, or they are washed away
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