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Chemosphere

Title:		Assessment of crude glycerol for Enhanced Biological Phosphorus Removal: Stability and role of long chain fatty acids
Author(s):		Taya C; Guerrero J; Suarez-Ojeda ME; Guisasola A; Baeza JA;
Address:		"GENOCOV, Departament d'Enginyeria Quimica, Escola d'Enginyeria, Universitat Autonoma de Barcelona, 08193 Bellaterra, Barcelona, Spain. Electronic address: carlota.taya@uab.cat. GENOCOV, Departament d'Enginyeria Quimica, Escola d'Enginyeria, Universitat Autonoma de Barcelona, 08193 Bellaterra, Barcelona, Spain. Electronic address: franciscojavier.guerrero@uab.cat. GENOCOV, Departament d'Enginyeria Quimica, Escola d'Enginyeria, Universitat Autonoma de Barcelona, 08193 Bellaterra, Barcelona, Spain. Electronic address: mariaeugenia.suarez@uab.cat. GENOCOV, Departament d'Enginyeria Quimica, Escola d'Enginyeria, Universitat Autonoma de Barcelona, 08193 Bellaterra, Barcelona, Spain. Electronic address: albert.guisasola@uab.cat. GENOCOV, Departament d'Enginyeria Quimica, Escola d'Enginyeria, Universitat Autonoma de Barcelona, 08193 Bellaterra, Barcelona, Spain. Electronic address: juanantonio.baeza@uab.cat"
Journal Title:		Chemosphere
Year:		2015
Volume:		20150616
Issue:
Page Number:		50 - 56
DOI:		10.1016/j.chemosphere.2015.05.067
ISSN/ISBN:		1879-1298 (Electronic) 0045-6535 (Linking)
Abstract:		"Enhanced Biological Phosphorus Removal (EBPR) of urban wastewaters is usually limited by the available carbon source required by Polyphosphate Accumulating Organisms (PAO). External carbon sources as volatile fatty acids (VFA) or other pure organic compounds have been tested at lab scale demonstrating its ability to enhance PAO activity, but the application of this strategy at full-scale WWTPs is not cost-effective. The utilization of industrial by-products with some of these organic compounds provides lower cost, but it has the possible drawback of having inhibitory or toxic compounds to PAO. This study is focused on the utilization of crude glycerol, the industrial by-product generated in the biodiesel production, as a possible carbon source to enhance EBPR in carbon-limited urban wastewaters. Crude glycerol has non-negligible content of other organic compounds as methanol, salts, VFA and long chain fatty acids (LCFA). VFA and methanol have been demonstrated to enhance PAO activity, but there is no previous study about the effect of LCFA on PAO. This work presents the operation of an EBPR SBR system using crude glycerol as sole carbon source, studying also its long-term stability. The effect of LCFA is evaluated at short and long-term operation, demonstrating for the first time EBPR activity with LCFA as sole carbon source and its long-term failure due to the increased hydrophobicity of the sludge"
Keywords:		"Bacteria, Anaerobic/growth & development Carbon/chemistry Fatty Acids/*chemistry Glycerol/*chemistry Hydrophobic and Hydrophilic Interactions Methanol/chemistry Phosphorus/*isolation & purification Polyphosphates/chemistry Sewage/chemistry/microbiology Wa;"
Notes:		"MedlineTaya, Carlota Guerrero, Javier Suarez-Ojeda, Maria Eugenia Guisasola, Albert Baeza, Juan Antonio eng Research Support, Non-U.S. Gov't England 2015/06/21 Chemosphere. 2015 Dec; 141:50-6. doi: 10.1016/j.chemosphere.2015.05.067. Epub 2015 Jun 16"