E10 is a blend of 10% bioethanol and 90% gasoline that can be used in the engines of most cars without causing damage. Currently for the E10 blend, Jamaica imports gasoline from Trinidad & Tobago and bioethanol from Brazil because the bioethanol production in Jamaica is at an early stage. However, the country has great potential for bioethanol production. In order to assess the environmental and economic feasibility of bioethanol in Jamaica, this paper presents an economic and environmental life cycle assessment for a case study in Jamaica in two different scenarios. The Baseline Scenario represents the use of E10 in the current conditions in which bioethanol comes from Brazil and gasoline from Trinidad & Tobago. Scenario I represents the use of E10 with bioethanol from Jamaica and gasoline from Trinidad & Tobago. The comparative environmental life cycle assessment revealed that the Baseline Scenario had better results than Scenario I in ten environmental categories. The economic assessment results in Scenario I were 7% higher than in the Baseline Scenario. Hence, the current context (Baseline Scenario) was identified as the scenario with the best economic performance. Therefore, the current situation in Jamaica (Baseline Scenario) scored better results than Scenario I from an environmental and an economical point of views. It is recommended to increase the bagasse cogeneration of Scenario I to lower the environmental impacts. To improve their productivity, it is necessary to improve the Jamaican sugar infrastructure by combining molasses and cane juice to produce bioethanol.

Graphic abstract

中文翻译：

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牙买加生物乙醇：环境和经济生命周期评估

E10是10％生物乙醇和90％汽油的混合物，可在大多数汽车的发动机中使用而不会造成损坏。目前，对于E10混合物，牙买加从特立尼达和多巴哥进口汽油，从巴西进口生物乙醇，因为牙买加的生物乙醇生产处于早期阶段。但是，该国具有巨大的生物乙醇生产潜力。为了评估牙买加生物乙醇的环境和经济可行性，本文针对牙买加在两种不同情况下的案例研究提出了经济和环境生命周期评估。基准情景代表了在当前条件下使用E10的情况，其中来自巴西的生物乙醇和来自特立尼达和多巴哥的汽油。方案I表示E10与牙买加的生物乙醇和特立尼达和多巴哥的汽油一起使用。比较性的环境生命周期评估显示，基准情景在十个环境类别中的效果均优于情景一。方案I的经济评估结果比基准方案高7％。因此，当前的情况（基准情景）被确定为具有最佳经济绩效的情景。因此，从环境和经济角度来看，牙买加的当前情况（基准情景）比情景I的结果更好。建议增加方案I的甘蔗渣热电联产，以减少对环境的影响。为了提高其生产率，有必要通过将糖蜜和甘蔗汁混合以生产生物乙醇来改善牙买加的糖基础设施。

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