Water play important role in industrial operation of food processing, such ingredient of the product, operation of equipment such as boilers, cooling towers, cleaning purposes to ensure a sufficient level of hygiene and food safety etc. Rwanda is rapidly developing and this development is associated with increase in population, urbanization, industrialization, modification of agricultural practices including rise in area of irrigated land etc. All these could cause increase in water uses and modification of water demand. Assessing future water demand of the country requires the understanding of specific water demand of different sectors mentioned above and its variation within those sectors. Growth of industrial sector is expected to rise in Rwanda especially because of the created enabling environment; this of cause will cause the rise in industrial water demand. In order to understand industrial water demand and be able to project it for the future it is necessary to know specific water demand of different type of industries in the country. However, there is no published evidence of this information country wide. It is therefore necessary to conduct industrial water demand assessment in the country. The main of this study is to quantify industrial water demand for different types of industries in Rwanda. The data used for this study were obtained from records of various food processing industries and breweries, interviews and from relevant organizations such as Rwanda Development Board (RDB), Water and Sanitation Corporation (WASAC), Ministry of Trade (MINICOM), and National Institute of Statistics of Rwanda (NISR). Specific water demand for various products was estimated taking into consideration the amount of water used and quantity of product produced. Correlation method in MATHLAB was used to determine the relationship between water used and production. The results show that industrial water used for some industrial production in Rwanda is within the recommend limit example maize flour 2m3/ton and breweries such as beer production industry 4 to 4.5 m3/m3 and carbonate soft drink industries 4m3/m3, as against internationally recommended water of 2m3/ton, and 6.5 m3/m3 respectively. However water uses for of the following, Sugar making industry 29/m3/t, Meat processing industry 5/m3/t and Tomato paste production industry 6 m3/ton exceeded the internationally recommended which are 25/m3/t, 2/m3/t, 3.58 m3/ton. Tomato Paste production industry shown strong relationship because as water demand is increasing also production is increasing. Thus from this linear model, about 98% of the variation in water demand can be explained by variation of tomato paste production due to high relationship between water demand and tomato paste production. The quantity of water consumption differs between types of industries. It was revealed that the brewing industries uses more water than any other kind of industries in Rwanda this could related the amount of production and demand for the product. There is wide difference in specific water consumption between various industries. Brewery industries in Rwanda have shown best practice of water demand with specific water demand of 4 to 4.5 m3/m3 of final product in which is less than the global bench mark of 6.5 m3/m3. Improvements need to be made in order to achieve the recommended best practice of three cubic meters of raw water for every cubic meter of carbonate soft drinks and four cubic meters of raw water for every cubic meter of beer produced.

中文翻译：

---

卢旺达农业加工和饮料行业的工业用水需求

水在食品加工的工业运行中起着重要作用，例如产品成分，锅炉，冷却塔等设备的运行，清洁目的，以确保足够的卫生和食品安全水平等。卢旺达正在迅速发展，与此相关联随着人口的增加，城市化，工业化，农业实践的改变，包括灌溉土地面积的增加等，所有这些都可能导致用水量的增加和需水量的改变。评估该国未来的用水需求需要了解上述不同行业的具体用水需求及其在这些行业中的变化。卢旺达工​​业部门的增长预计将增长，特别是由于创造了有利的环境；这将导致工业用水需求的增加。为了了解工业用水需求并能够对未来进行预测，有必要了解该国不同类型工业的具体用水需求。但是，没有发布的证据表明该信息在全国范围内。因此，有必要在该国进行工业用水需求评估。这项研究的主要目的是量化卢旺达不同类型工业的工业用水需求。本研究使用的数据来自各种食品加工业和啤酒厂的记录，访谈以及相关组织，如卢旺达发展委员会（RDB），供水与卫生公司（WASAC），贸易部（MINICOM）和国家研究所卢旺达统计局（NISR）。考虑到用水量和生产的产品量，估计了各种产品的特定需水量。使用MATHLAB中的相关方法确定用水量与产量之间的关系。结果表明，在卢旺达的一些工业生产中使用的工业用水在推荐极限范围内，例如玉米粉2m3 /吨和啤酒厂4-4.5m3 / m3和碳酸盐软饮料工业4m3 / m3的啤酒厂，与国际上推荐的相比分别为2立方米/吨和6.5立方米/立方米的水。然而，以下国家的用水量超过了国际建议的水平：制糖业29 / m3 / t，肉类加工业5 / m3 / t和番茄酱生产工业6m3 / t，分别为25 / m3 / t，2 / m3 / t。吨，3.58立方米/吨。番茄酱生产行业显示出密切的关系，因为随着水需求的增加，产量也在增加。因此，根据该线性模型，由于需水量与番茄酱产量之间的高度相关性，因此番茄酱产量的变化可以解释约98％的需水量变化。用水量因行业类型而异。据透露，与卢旺达的任何其他种类的工业相比，酿造业使用的水更多，这可能与产品的产量和需求有关。不同行业之间的具体用水量差异很大。卢旺达的啤酒工业显示出最佳的需水实践，最终产品的特定需水量为4至4.5立方米/立方米，低于全球基准水平6.5立方米/立方米。