Abstract
The FOS/TAC parameter is used to monitor process stability by focusing on the pH value. FOS/TAC is defined as the ratio of the amount of volatile fatty acids that accumulate during anaerobic digestion to the alkalinity present in the system (Lili et al. in Analele Univ Din Oradea Fasc Protecția Mediu 17:713–718, 2011). Since volatile fatty acids accumulate during the acidogenesis phase, they can lead to a consumption of alkalinity and consequently a decrease in pH. For this reason, it is of fundamental importance to have a buffer solution that can counteract the pH decrease bringing it back to neutral values, as the optimal pH value for an anaerobic digester is around 7 (Pontoni et al. in Chem Eng Trans 43:2089–2094, 2015).
This is a preview of subscription content, log in via an institution to check access.
Access this chapter
Tax calculation will be finalised at checkout
Purchases are for personal use only
References
Lili M, Biró G, Sulyok E, Petis M, Borbély J, Tamás J (2011) Novel approach on the basis of FOS/TAC method. Analele Univ Din Oradea Fasc Protecția Mediu 17:713–718
Pontoni L, Panico A, Salzano E, Frunzo L, Iodice P, Pirozzi F (2015) Innovative parameters to control the efficiency of anaerobic digestion process. Chem Eng Trans 43:2089–2094. https://doi.org/10.3303/CET1543349
Liu X, André L, Mercier-Huat M, Grosmaître J-M, Pauss A, Ribeiro T (2021) Accurate estimation of bicarbonate and acetic acid concentrations with wider ranges in anaerobic media using classical FOS/TAC titration method. Appl Sci 11(24):24. https://doi.org/10.3390/app112411843
Veluchamy C, Gilroyed BH, Kalamdhad AS (2019) Process performance and biogas production optimizing of mesophilic plug flow anaerobic digestion of corn silage. Fuel 253:1097–1103. https://doi.org/10.1016/j.fuel.2019.05.104
Steffen R, Szolar O, Braun R (1998) Feedstocks for anaerobic digestion. Inst Agrobiotechnol Tulin Univ Agric Sci Vienna 12:1–29
Legner M, McMillen DR, Cvitkovitch DG (2019) Role of dilution rate and nutrient availability in the formation of microbial biofilms. Front Microbiol 10:916. https://doi.org/10.3389/fmicb.2019.00916
Babaee A, Shayegan J (2020) Effect of organic loading rates (OLR) on production of methane from anaerobic digestion of vegetables waste
Labatut RA, Pronto JL (2018) Sustainable waste-to-energy technologies: anaerobic digestion
Gou C, Yang Z, Huang J, Wang H, Xu H, Wang L (2014) Effects of temperature and organic loading rate on the performance and microbial community of anaerobic co-digestion of waste activated sludge and food waste
Chen L et al (2022) Effects of organic loading rates on the anaerobic co-digestion of fresh vinegar residue and pig manure: focus on the performance and microbial communities
Li L, He Q, Ma Y, Wang X, Peng X (2015) Dynamics of microbial community in a mesophilic anaerobic digester treating food waste: relationship between community structure and process stability
Yu Q, Feng L, Zhen X (2021) Effects of organic loading rate and temperature fluctuation on the microbial community and performance of anaerobic digestion of food waste
Demirel B, Yenigun O (2004) Anaerobic acidogenesis of dairy wastewater: the effects of variations in hydraulic retention time with no pH control
Khan MA et al (2016) Optimization of process parameters for production of volatile fatty acid, biohydrogen and methane from anaerobic digestion
Varol A, Ugurlu A (2017) Comparative evaluation of biogas production from dairy manure and co-digestion with maize silage by CSTR and new anaerobic hybrid reactor
Nagao N et al (2012) Maximum organic loading rate for the single-stage wet hanaerobic digestion of food waste
Author information
Authors and Affiliations
Corresponding author
Rights and permissions
Copyright information
© 2024 The Author(s), under exclusive license to Springer Nature Switzerland AG
About this chapter
Cite this chapter
Moretta, F., Bozzano, G. (2024). Stability Parameters. In: Mathematical and Statistical Approaches for Anaerobic Digestion Feedstock Optimization. SpringerBriefs in Energy. Springer, Cham. https://doi.org/10.1007/978-3-031-56460-4_5
Download citation
DOI: https://doi.org/10.1007/978-3-031-56460-4_5
Published:
Publisher Name: Springer, Cham
Print ISBN: 978-3-031-56459-8
Online ISBN: 978-3-031-56460-4
eBook Packages: EnergyEnergy (R0)