Browsing by Author "Lemos Valencia, Yordy Mario"
Now showing 1 - 1 of 1
Results Per Page
Sort Options
Item Medición de presión continúa basada en tecnología 1ot con aplicación e ensayos de potencial bioquímico de metano(Universidad Santiago de Cali, 2022) Lemos Valencia, Yordy Mario; Pérez Vidal, Andrea (Directora)PBM methane biochemical potential assays are an evaluation tool in anaerobic digestion that allows estimating the amount of methane that can be generated for each gram of volatile solids digested used, mainly in studies of degradation of organic solid waste. Within the PBM test, there are different methods to obtain the process information which will arise from the system configuration, the type of access to the process and the way to measure it. One of these methods is manometric, which uses pressure variations to quantify methane generation during anaerobic digestion. However, this method has the characteristic of being linked to recursion and uncertainty due to human error due to the need for an operator. With this research project, the development of a continuous pressure measurement device supported by IoT technology was proposed to be used in biochemical potential tests of Methane, improving the reliability and precision of the measured data and reducing the error inherent in the manometric method. associated with the loss of biogas during each measurement. The development includes the use of Arduino microcontrollers and IoT platforms such as Esp8266 and Blynk for the creation of the device. For the design, specifications were taken into account for the selection of the pressure sensor such as: size, type of supply, measurement range and linearity of the output with respect to the input. The MPX2050 was selected as sensor and the electronic design was carried out with the Proteus tool. The implementation of this design was evaluated through a simultaneous triplicate PBM test and compared with the manual manometric method (MM) using biogas pressure (mbar) as the response variable. For the test, an inoculum concentration of 1.5 mg/L (anaerobic sludge from septic tank) and synthetic substrate (glucose + nutrients) in a COD concentration of 710.5 mg/L were used. Glass containers with a capacity of 250 mL were used, leaving a free space (headspace) of 20%; a digital manometer was used for the MM method. The results indicate that the continuous pressure measurement provided by the device was reliable, improving the uncertainty associated with the manual process with the MM method and achieving a more accurate record of biogas production. It is ruled out that the MM method underestimates biogas production due to its average loss of 50.7 ± 12.9 mbar during each measurement.