Isolation of Cellulose Fiber from Water Hyacinth (Eichornia crassipes) by Bleaching-Alkalination Method Nur Hidayah [1] , Ikna Urwatul Wusko 2 {nurhidayah@unism.ac.id 1 , iknaurwatulwusko@unism.ac.id 2 } 1 Department of Information System, Faculty of Sains and Technology, Sari Mulia University, Banjarmasin, Kalimantan Selatan, 2 Department of Industrial Engineering, Faculty of Sains and Technology, Sari Mulia University, Banjarmasin, Kalimantan Selatan Abstract. The growth of water hyacinth (Eichornia crassipes) as weeds of floating aquatic plants occurs so fast that it is often regarded as waste. Water hyacinth that develops rapidly in the aquatic environment can cause environmental damage and can be one of the factors causing floods. Behind the negative assumption that water hyacinth is a plant that is rich in natural fiber content, namely cellulose. This study aims to characterize the content in water hyacinth and cellulose fiber insulation using an alkali method. By using SNI 01 2891.1992 as a characterization procedure, values of water content, fat content, crude fiber content, ash content, protein content and carbohydrate content for water hyacinth plants in Banjarmasin waters were respectively. While cellulose fiber insulation results by 53,45%, lignin 24,43% and hemicellulose 22,12%. Keywords: Please list your keywords in this section. 1 Introduction Water hyacinth is a weed plant that belongs to the family Pontederiaceae. Water hyacinth has thick oval-shaped leaves with a fresh green color and shiny when exposed to sunlight [1]. The leaves are supported by cylindrical stems extending to lengths up to 1 meter and 1-2 cm in diameter [2]. The water hyacinth stalk has strong, weak fibers and contains a lot of water. Water hyacinth can live free floating on the surface of the water and rooted in the bottom of a pond or swamp with shallow water [3]. Nutrition for its development is obtained by sucking water and vaporizing it back through the leaves of plants exposed to the sun through the evaporation process. So to be able to grow water hyacinth is very dependent on the presence of sunlight and the availability of water [4]. NS-UNISM 2019, November 23, Banjarmasin, Indonesia Copyright © 2020 EAI DOI 10.4108/eai.23-11-2019.2298330