Search

2 Figuras.-- 2 Tablas, The use of olive mill solid waste (OMSW) for energy production has mainly been promoted through combustion processes. However, the EU is promoting the substitution of combustion in favor of greener alternatives. Several publications have stated that the energy obtained from anaerobic digestion (AD) is a feasible waste‐to‐energy technology for OMSW. However, these studies lack reliable energy balances that can assess this statement. The present research work aims to address this issue by evaluating the energy potential of the biomethanization of OMSW in comparison with the current combustion technology, based on a review of the available scientific literature. The present analysis demonstrates that the AD of OMSW can generate a net energy production in the same range as that obtained from the OMSW combustion, qualifying AD as an alternative to combustion but not clearly offering a surplus of energy production. © 2020 Society of Industrial Chemistry and John Wiley & Sons Ltd, Funding Information Universidad de Sevilla. Grant Number: mobility grant PP2019‐532

Flue gas conditioning (FGC) systems are an effective option for improving the performance of electrostatic precipitators (ESP). The effect of FGC on the cohesive forces in ash layers during electrostatic precipitation has been studied for a complete range of ash compositions. Cohesive forces have been determined by means of a laboratory apparatus specifically developed within this research work. SO3 and NH3 have been tested as conditioning agents. It is concluded that the effect of injecting NH3 on the cohesive properties is variable, and depends on the type of ash. The mechanism of NH3 adsorption, influenced by the carbon content in ash, appears to play an important role. On the other hand, SO3 addition involves the reduction of the cohesive forces in all the cases tested. © 2015 American Institute of Chemical Engineers Environ Prog, 34: 1379–1383, 2015

This article describes a number of tests that have been carried out using a pilot electrostatic precipitator (ESP) which operates with flue gases from a coal power plant. The purpose of these tests was to show the influence of the characteristics of the ash (resistivity) and the main design variables of an ESP (type of discharge electrode and collecting plate spacing) on the fouling of plates and discharge electrodes and the reentrainment of dust. Two types of coal, with high and low resistivity ashes, respectively, three types of discharge electrodes, and three typical collecting plate spacings were used in the tests. In fouling tests, the dust emission growth rate during periods with no rapping, the maximum permissible rapping interval, and the recuperation rate of the dust emission level after rapping were characterized. The maximum permissible rapping interval was defined as the time in which no alteration is observed in the operational variables of the ESP. In rapping tests, the relative increase of the dust emission level due to reentrainment was also characterized. The results of these tests have made possible to identify, for each of the tested coals, the ESP configurations (plate spacing and type of electrode) less sensitive to the formation of a permanent layer of ash and to the particle reentrainment due to rapping. © 2014 American Institute of Chemical Engineers Environ Prog, 34: 7–14, 2015