On-line titration of volatile fatty acids for the process control of anaerobic digestion plants

Feitkenhauer, Heiko; Sachs, Jiirgen Von; Meyer, Ulrich

doi:10.1016/s0043-1354(01)00189-0

Cited by 71 publications

(28 citation statements)

References 11 publications

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“…DO and ORP were determined by a portable meter (WTW 340i, Germany). VFA was measured by titration method using Delta 320-s pH meter (Mettler-Toledo Group, Greifensee, Switzerland) (Feitkenhauer et al, 2002). Sulfate was determined by ion chromatography using a conductivity detector (Dionex ICS-1000, Japan).…”

Section: Water Quality Analysismentioning

confidence: 99%

Improving hydrolysis acidification by limited aeration in the pretreatment of petrochemical wastewater

Zhou

Wang

et al. 2015

Bioresource Technology

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Section: Water Quality Analysismentioning

confidence: 99%

Improving hydrolysis acidification by limited aeration in the pretreatment of petrochemical wastewater

Zhou

Wang

et al. 2015

Bioresource Technology

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“…The production rate of methane (L-CH 4 /days) was used successfully like an on line indicator to control a CSTR digester (Feitkenhauer & al., 2002).…”

Section: Methane and Carbon Dioxidementioning

confidence: 99%

Production of Biogas from Sludge Waste and Organic Fraction of Municipal Solid Waste

Derbal¹,

Mossaab²,

Hassen³

2012

Biogas

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“…Another titrimetric methodology based on the two-point titration of Anderson & Yang (1992) is reported by Feitkenhauer et al (2002), for the online determination of short chain organic acids.…”

Section: Titrimetrymentioning

confidence: 99%

Methods of assessing microbial activity and inhibition under anaerobic conditions: a literature review

Rozzi

Remigi

2004

Rev Environ Sci Biotechnol

109

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This work reviews the existing methodologies for assessing microbial activity and inhibition under anaerobic conditions. The anaerobic digestion process consists of several metabolic steps: the Anaerobic Digestion Model No. 1 (ADM1) has attempted to describe these steps in the form of a mathematical model with the intention of providing a reference base for all further efforts in the modelling of anaerobic processes. The existence of a reference point for modelling has highlighted the fact that there is a lack of coherence between the many different methodologies for experimentally assessing anaerobic activity and inhibition.A working group of the International Water Association was recently founded to harmonise the existing methodologies with the ultimate intention of developing a unified reference procedure: a primary objective of the group will be the establishment of a standard terminology in the field of anaerobic digestion, activity and inhibition assessment. Secondly, it will compare the existing methodologies and develop standard protocols for assessing the kinetic parameters (e.g. maximum uptake rate, half-saturation constant) of anaerobic processes that may be entered directly into ADM1 and its successors. This paper revises and enlarges a contribution presented by the authors at the workshop ''Harmonisation of anaerobic biodegradation, activity and inhibition assays'' (Ligthart & Nieman 2002, Proc. workshop held in Orta (Italy) June 7-8, 2002) and aims to promote a clear understanding of the currently established methodology.Numerous methods have been developed over the past 30 years, since Van den Berg et al. (1974, Biotechnol Bioeng 16(11): 1459-1469) measured methanogenic activity, by using a manometric device equipped with a photoelectric sensor to quantify the gas production. Methanogenesis is often the rate limiting step of the entire process and since the quantification of gas flowrate is relatively easy to perform, most of the methods reported in literature monitor the production of biogas. These methods can be termed volumetric or manometric methods, as the volume of biogas produced or the pressure increase due to gas production inside a close vessel are assessed, respectively. However, this same concept can be employed to assess activity or inhibition of individual metabolic steps preceding the methanogenic one, providing that they are rate limiting for the whole process. The reliability of activity assessment through gas measurement has been proven to be strongly dependent on the equilibrium between liquid and gas phase in a closed vessel. This can be influenced by many factors, e.g. the amount and characteristics of the test substrate; the concentration of the biomass; the gas-to-liquid ratio: all these aspects will need to be addressed in the standard procedure. Other direct or indirect methods, targeting physico-chemical or microbiological parameter exist and have been investigated by many authors. Besides the interest for research purposes, the definition of reference methods to assess ...

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On-line titration of volatile fatty acids for the process control of anaerobic digestion plants

Cited by 71 publications

References 11 publications

Improving hydrolysis acidification by limited aeration in the pretreatment of petrochemical wastewater

Improving hydrolysis acidification by limited aeration in the pretreatment of petrochemical wastewater

Production of Biogas from Sludge Waste and Organic Fraction of Municipal Solid Waste

Methods of assessing microbial activity and inhibition under anaerobic conditions: a literature review

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