Estudio de factibilidad de generación de biogás empleando aguas residuales producidas en fábrica de papel.

Abstract

The objective of this project is to determine the feasibility of generating biogas using wastewater produced in paper mills, for the use of a new source of power generation in the boiler area or an additional alternative for generating electric power. In the primary treatment, the COD and BOD reduction of water pollution determines high efficiency in the process. The project describes the importance of the wastewater consumption and the significant values that they represent when it is minimized in the clarifier, as in the reactor to convert the waste into an energy source. An arduous investigation and documentation of the year 2020 were carried out in order to implement the project and to quantify the biogas average production. It was concluded that the value is between 200 𝑚3 ℎ and 250𝑚3 ℎ , depending on the production units and how much water is treated in the plant of wastewater treatment, along with the anaerobic reactor for the biogas production in the boiler area. This plant consists of two boilers. The first is a CBLE 500, which generates 17250𝑙𝑏 ℎ . The second is a CBLE 400, which generates 13500 𝑙𝑏 ℎ . The result from the projected calculations is 147.937 BHP, or its equivalent 5103.83𝑙𝑏 ℎ . Its generating capacity involves 46.31% of the total generation, which is 11020𝑙𝑏 ℎ . Additionally, the generation of electric energy was Q=1451.40 kW, and the amount of biogas was the same. For the economic analysis, the value was estimated in accordance with the project proposal that requires investing in a reengineering implementation, in order to use this energy source in a boiler. This reengineering entails changes in certain parameters such as air, type of combustion and another type of dual burner, which allows working with different fuel types, such as diesel and biogas, in order to supply for the existing demand in the plant. The cost saving is evident because of the high estimate for the fuel, approximately $1.304 per gallon; this cost varies in line with the international price. The total sum amounts to $ 268,573, according to the calculations of the year 2020. This project is key to the preservation of the environment. Therefore, it shows thatXVII it is possible for a company to use this type of green energy in its processes and, at the same time, to achieve economic profit as well as positive social impact.