Projeto de indústria autossustentável para produção de celulose não branqueada de fibra curta a partir de resíduos do coco verde (Cocos nucifera L.)

Abstract

The main objective of this work is to design and scale a self-sustainable industry for the production of unbleached hardwood kraft pulp (UBHKP), based on the reuse of coconut waste. In this regard, the industry seeks to integrate into the UBHKP coil sales market, aiming for application in resistant and absorbent packaging, a part of the market that is in growing demand on the national scene. Production aimed at the intern market proved to be advantageous and competitive, in addition to being socio-environmentally beneficial, since waste from green coconut shells (Cocos nucifera L.) will be collected from sand strips and landfills, as well as through partnerships with industries that generate from this solid waste. Thus, this proposal is in accordance with the National Solid Waste Policy (PNRS), which provides for the reduction and prevention of waste generation, as well as being of great importance from a public health point of view, as the incorrect disposal of Coconut contributes to the spread of diseases, especially dengue. The project began with the definition of the product, evaluation of the technological routes and definition of the business model, followed by the sizing of the production unit, control system and instrumentation for critical equipment in the recovery cycle, in addition to the analysis of economic viability, considering up all costs and return preempted. The strategic location of the plant, in the Camaçari Industrial Complex, Bahia, contributed to easy access to raw materials, with demand equal to 10,000 kg/h of green coconut shell to produce 945 kg/h of UBHKP through the Kraft process, enabling the sizing of the recovery cycle, which characterizes the recovery of reagents and promotes the energy self-sustainability of the industrial installation. At the end of the project, it is clear that the installation of the UBHKP industrial plant using green coconut shells becomes viable, with a calculated investment of R$ 67,245,870.44, discounted payback of 11 years and a Net Present Value (VPL) of R$ 12,617,919.81, at the end of 20 years.