## 1 Introduction  
The paper industry is recognized as one of the leading sectors in terms of production, consumption, and economic impact, providing essential products such as paper and cellulose derivatives [1]. Currently, global production of paper and paperboard has reached approximately 420 million tons, with China, the United States, Finland, Germany, and Japan as the primary producers [2, 3]. In Asia, China leads as the world's largest paper producer, with an annual output of 110 million tons [4]. In Latin America, Ecuador contributes significantly, producing around 200,000-300,000 tons of paper annually, marking an important addition to the national economy. In 2022, the industry registered a Gross Value Added of USD 404 million, representing 0.57% of the total GDP [5]. The Ecuadorian paper industry relies heavily on imported raw materials, such as wood pulp, rendering it susceptible to fluctuations in the global market. These fluctuations are often triggered by unforeseen events, including natural disasters, shifts in supply and demand, or trade tensions among major economic powers, leading to abrupt adjustments in operational costs [6, 7]. This dependence underscores the need to explore alternative raw material sources to optimize costs and enhance production stability. Bacterial cellulose (BC) has emerged as a promising raw material for the paper industry due to its natural origin, as cellulose is secreted by certain types of bacteria as part of their metabolic processes [8]. Structurally, BC offers several advantages over plant-derived cellulose, primarily due to its lack of lignin and hemicellulose, which simplifies isolation and eliminates the need for pulping and bleaching processes, thereby optimizing economic, environmental, and energy considerations [9; 10]. Another advantage of BC is its production process. BC is produced in a shorter timeframe than conventional cellulose, as bacteria secrete it within 7 to 14 days of being introduced into a culture medium [11]. Furthermore, bacteria can grow in various culture media, provided they have an adequate and sustainable carbon source [12]. Consequently, in addition to conventional chemical media, agro-industrial waste extracts offer a valuable and cost-effective resource for the long-term production of BC, adding value to materials that are otherwise discarded. In Ecuador, approximately 2.486 million metric tons of banana peels and 80,000 metric tons of pineapple peels are produced annually due to the socioeconomic significance of these crops in the coastal region. These fruit peels, a form of agro-industrial waste rich in various sugars, are increasingly utilized to develop new products and reduce waste volume. Simple sugars such as glucose, fructose, and sucrose, prevalent in fruit by-products, serve as effective carbon sources for bacterial cellulose production, presenting new opportunities for cellulose-based by-products within the paper industry. Data mining, the core phase of the entire knowledge discovery process, has experienced significant growth in both academia and industry in recent years. It is a powerful technology for analyzing large data volumes, integrating mathematical algorithms and big data techniques to enhance the understanding of inter-variable relationships and to distill findings into a lower-dimensional space [13]. Multivariate techniques such as the PCA Biplot are particularly notable for their capacity to reveal relationships between variables that are not easily identified through conventional statistical methods, effectively grouping them based on shared characteristics [14; 15; 16]. The primary objective of this research is to employ the multivariate technique of Principal Component Analysis (PCA) Biplot to analyze productivity indicators of BC synthesized from agro-industrial by-product extracts. Additionally, the quality parameters of paper derived from BC were evaluated to determine the production medium that yields the optimal characteristics.