Assessment of energy efficiency and performance in a two-phase anaerobic process for organic matter removal

Energy efficiency (EE) depends mainly on the lower heating values (LHVs) of hydrogen and methane selected from the thermodynamics tables under ideal conditions. However, for practical applications, the heating value should be calculated by considering some environmental factors under real conditions...

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Autores principales:	Andrea D. P. Hurtado, Diana M. Hernández, Karol L. Fuentes, Tatiana R. Chaparro
Formato:	article
Lenguaje:	EN
Publicado:	IWA Publishing 2021
Materias:	acidogenic phase anaerobic digestion energy gain energy recovery heating value methanogenic phase Environmental technology. Sanitary engineering TD1-1066
Acceso en línea:	https://doaj.org/article/5697df9581d84a76b7ae465088f617dd
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spelling	oai:doaj.org-article:5697df9581d84a76b7ae465088f617dd2021-11-06T11:16:37ZAssessment of energy efficiency and performance in a two-phase anaerobic process for organic matter removal0273-12231996-973210.2166/wst.2021.243https://doaj.org/article/5697df9581d84a76b7ae465088f617dd2021-08-01T00:00:00Zhttp://wst.iwaponline.com/content/84/3/667https://doaj.org/toc/0273-1223https://doaj.org/toc/1996-9732Energy efficiency (EE) depends mainly on the lower heating values (LHVs) of hydrogen and methane selected from the thermodynamics tables under ideal conditions. However, for practical applications, the heating value should be calculated by considering some environmental factors under real conditions. Accordingly, this study compared EE using the ideal LHV with the EE using the real LHV in a two-phase anaerobic digestion reactor treating synthetic wastewater. Additionally, the process performance and the stability were studied. The results showed that the EE value calculated using LHVideal was, on average, 35% higher than that evaluated using LHVreal; these differences are relevant to the estimation of real energy and also for practical applications. At the same time, the index buffer intermediate alkalinity/partial alkalinity was shown to be more accurate than the pH value to analyze the stability of the process. With regards to chemical oxygen demand, the removal efficiency in the methanogenic phase decreased drastically when utilizing 100% of the acidogenic phase. Future considerations for the optimization of each phase are highlighted. HIGHLIGHTS Lower heating value should be adjusted to estimate the energy efficiency.; Different approaches are considered to evaluate the energy gain and the energetic efficiency in a anaerobic digestion process in two phases.; The IA/PA ratio is recommended as a process indicator if compared only with the pH value.;Andrea D. P. HurtadoDiana M. HernándezKarol L. FuentesTatiana R. ChaparroIWA Publishingarticleacidogenic phaseanaerobic digestionenergy gainenergy recoveryheating valuemethanogenic phaseEnvironmental technology. Sanitary engineeringTD1-1066ENWater Science and Technology, Vol 84, Iss 3, Pp 667-682 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	acidogenic phase anaerobic digestion energy gain energy recovery heating value methanogenic phase Environmental technology. Sanitary engineering TD1-1066
spellingShingle	acidogenic phase anaerobic digestion energy gain energy recovery heating value methanogenic phase Environmental technology. Sanitary engineering TD1-1066 Andrea D. P. Hurtado Diana M. Hernández Karol L. Fuentes Tatiana R. Chaparro Assessment of energy efficiency and performance in a two-phase anaerobic process for organic matter removal
description	Energy efficiency (EE) depends mainly on the lower heating values (LHVs) of hydrogen and methane selected from the thermodynamics tables under ideal conditions. However, for practical applications, the heating value should be calculated by considering some environmental factors under real conditions. Accordingly, this study compared EE using the ideal LHV with the EE using the real LHV in a two-phase anaerobic digestion reactor treating synthetic wastewater. Additionally, the process performance and the stability were studied. The results showed that the EE value calculated using LHVideal was, on average, 35% higher than that evaluated using LHVreal; these differences are relevant to the estimation of real energy and also for practical applications. At the same time, the index buffer intermediate alkalinity/partial alkalinity was shown to be more accurate than the pH value to analyze the stability of the process. With regards to chemical oxygen demand, the removal efficiency in the methanogenic phase decreased drastically when utilizing 100% of the acidogenic phase. Future considerations for the optimization of each phase are highlighted. HIGHLIGHTS Lower heating value should be adjusted to estimate the energy efficiency.; Different approaches are considered to evaluate the energy gain and the energetic efficiency in a anaerobic digestion process in two phases.; The IA/PA ratio is recommended as a process indicator if compared only with the pH value.;
format	article
author	Andrea D. P. Hurtado Diana M. Hernández Karol L. Fuentes Tatiana R. Chaparro
author_facet	Andrea D. P. Hurtado Diana M. Hernández Karol L. Fuentes Tatiana R. Chaparro
author_sort	Andrea D. P. Hurtado
title	Assessment of energy efficiency and performance in a two-phase anaerobic process for organic matter removal
title_short	Assessment of energy efficiency and performance in a two-phase anaerobic process for organic matter removal
title_full	Assessment of energy efficiency and performance in a two-phase anaerobic process for organic matter removal
title_fullStr	Assessment of energy efficiency and performance in a two-phase anaerobic process for organic matter removal
title_full_unstemmed	Assessment of energy efficiency and performance in a two-phase anaerobic process for organic matter removal
title_sort	assessment of energy efficiency and performance in a two-phase anaerobic process for organic matter removal
publisher	IWA Publishing
publishDate	2021
url	https://doaj.org/article/5697df9581d84a76b7ae465088f617dd
work_keys_str_mv	AT andreadphurtado assessmentofenergyefficiencyandperformanceinatwophaseanaerobicprocessfororganicmatterremoval AT dianamhernandez assessmentofenergyefficiencyandperformanceinatwophaseanaerobicprocessfororganicmatterremoval AT karollfuentes assessmentofenergyefficiencyandperformanceinatwophaseanaerobicprocessfororganicmatterremoval AT tatianarchaparro assessmentofenergyefficiencyandperformanceinatwophaseanaerobicprocessfororganicmatterremoval
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Assessment of energy efficiency and performance in a two-phase anaerobic process for organic matter removal

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