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Title: Presence of Siloxanes in the Biogas of a Wastewater Treatment Plant Separation in Condensates and Influence of the Dose of Iron Chloride on its Elimination

The siloxanes present in the biogas produced during anaerobic digestion damage the mechanism of cogeneration equipment and, consequently, negatively affect the energy valorization process. For this reason, the detection and elimination of these silicon-derived chemical compounds are a priority in the management of cogeneration facilities. In this regard, the objectives of this paper are, firstly, to characterize the siloxanes in the biogas and, secondly, to qualitatively evaluate the influence of the dose of iron chloride on its elimination. The research was performed at the Rincón de León Wastewater Treatment Plant (Alicante, Spain). The outflow biogas of the digesters and of the pressurized gasometers was sampled and analyzed. The results obtained made it possible to demonstrate, firstly, the absence of linear siloxanes and that, of the cyclic siloxanes, the predominant type was decamethylcyclopentasiloxane, and, secondly, that the addition of iron chloride in the digesters significantly reduces the siloxane content in the biogas. Additionally, it was demonstrated that the process of compression of the biogas, with the elimination of condensates, also produces significant reductions in the concentration of siloxanes in the biogas.
Authors:
 [1] ; ;  [2]
  1. Empresa Mixta de Aguas Residuales de Alicante, S.A. (EMARASA) (Spain)
  2. University Institute of Water and Environmental Sciences, University of Alicante (Spain)
Publication Date:
OSTI Identifier:
22504549
Resource Type:
Journal Article
Resource Relation:
Journal Name: International Journal of Waste Resources; Journal Volume: 6; Journal Issue: 1; Other Information: PUBLISHER-ID: 2252-5211.1000192; Copyright: (c) 2015 García M, et al.; This is an open-access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
Indonesia
Language:
English
Subject:
54 ENVIRONMENTAL SCIENCES; ANAEROBIC DIGESTION; COGENERATION; CONDENSATES; DECONTAMINATION; DOSES; IRON CHLORIDES; METHANE; PLANTS; SILOXANES; WASTE WATER; WATER TREATMENT