ADM1 based mathematical model of trace element precipitation/dissolution in anaerobic digestion processes

Maharaj, Bikash Chandra; Mattei, Maria Rosaria; Frunzo, Luigi; Hullebusch, Eric D. van; Esposito, Giovanni

doi:10.1016/j.biortech.2018.06.099

Cited by 39 publications

(20 citation statements)

References 42 publications

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“…The use of the ADM1, with the first-order rate constant assigned for disintegration (K dis ) and hydrolysis (K hyd ) as 0.5 day −1 and 10 day −1 , respectively, reflected the steady-state full-scale anaerobic digestion data collected from two different sized wastewater treatment plants with satisfactory level of accuracy [120]. The ADM1 is used extensively for modeling anaerobic digestion of solid wastes and has been studied and modified to reflect different physico-chemical and biochemical processes in the anaerobic digestion process [121][122][123][124]. The ADM1 models the disintegration and hydrolysis steps in anaerobic digestion following a first-order kinetics and assuming that their rates do not depend on disintegration/hydrolytic biomass concentration.…”

Section: Kinetics Of Anaerobic Digestionmentioning

confidence: 99%

Influence of Pre-Hydrolysis on Sewage Treatment in an Up-Flow Anaerobic Sludge BLANKET (UASB) Reactor: A Review

Rajagopal

Choudhury

Anwar

et al. 2019

Water

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The up-flow anaerobic sludge blanket (UASB) process has emerged as a promising high-rate anaerobic digestion technology for the treatment of low- to high-strength soluble and complex wastewaters. Sewage, a complex wastewater, contains 30–70% particulate chemical oxygen demand (CODP). These particulate organics degrade at a slower rate than the soluble organics found in sewage. Accumulation of non-degraded suspended solids can lead to a reduction of active biomass in the reactor and hence a deterioration in its performance in terms of acid accumulation and poor biogas production. Hydrolysis of the CODP in sewage prior to UASB reactor will ensure an increased organic loading rate and better UASB performance. While single-stage UASB reactors have been studied extensively, the two-phase full-scale treatment approach (i.e., a hydrolysis unit followed by an UASB reactor) has still not yet been commercialized worldwide. The concept of treating sewage containing particulate organics via a two-phase approach involves first hydrolyzing and acidifying the volatile suspended solids without losing carbon (as methane) in the first reactor and then treating the soluble sewage in the UASB reactor. This work reviews the available literature to outline critical findings related to the treatment of sewage with and without hydrolysis before the UASB reactor.

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Section: Kinetics Of Anaerobic Digestionmentioning

confidence: 99%

Influence of Pre-Hydrolysis on Sewage Treatment in an Up-Flow Anaerobic Sludge BLANKET (UASB) Reactor: A Review

Rajagopal

Choudhury

Anwar

et al. 2019

Water

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“…This provides important information on the TE requirements of complex microbial communities with minimal effects from the chemical complexation with the substrate matrix. As a result, this knowledge can be applied together with information on substrate composition to more accurately determine the optimal supplementation levels for a range of AD systems, as well as to provide information needed to improve mathematical models of AD [26]. Finally, shifts in the microbial community composition were monitored in this study together with VFA-and methane production dynamics to elucidate the effects of TE deficiency on the system and provide further insights on the dynamics of TE-induced process disturbances.…”

Section: Introductionmentioning

confidence: 99%

Effect of Cobalt, Nickel, and Selenium/Tungsten Deficiency on Mesophilic Anaerobic Digestion of Chemically Defined Soluble Organic Compounds

et al. 2020

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Trace elements (TEs) are vital for anaerobic digestion (AD), due to their role as cofactors in many key enzymes. The aim of this study was to evaluate the effects of specific TE deficiencies on mixed microbial communities during AD of soluble polymer-free substrates, thus focusing on AD after hydrolysis. Three mesophilic (37 °C) continuous stirred-tank biogas reactors were depleted either of Co, Ni, or a combination of Se and W, respectively, by discontinuing their supplementation. Ni and Se/W depletion led to changes in methane kinetics, linked to progressive volatile fatty acid (VFA) accumulation, eventually resulting in process failure. No significant changes occurred in the Co-depleted reactor, indicating that the amount of Co present in the substrate in absence of supplementation was sufficient to maintain process stability. Archaeal communities remained fairly stable independent of TE concentrations, while bacterial communities gradually changed with VFA accumulation in Ni- and Se-/W-depleted reactors. Despite this, the communities remained relatively similar between these two reactors, suggesting that the major shifts in composition likely occurred due to the accumulating VFAs. Overall, the results indicate that Ni and Se/W depletion primarily lead to slower metabolic activities of methanogenic archaea and their syntrophic partners, which then has a ripple effect throughout the microbial community due to a gradual accumulation of intermediate fermentation products.

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“…TE sorption in sludge) that play key roles in the chemical speciation of TE in AD bioreactors in relation to sulfur (S). In addition, the precipitation of metals by sulfide (S 2− ), CO 2− 3 and PO 3− 4 may also play a pivotal role in nutrients and TE turnover ( Figure 2.2) (Fermoso et al, 2015;Maharaj et al, 2018;Thanh et al, 2016).…”

Section: Biogeochemical Processes 231 Introductionmentioning

confidence: 99%

Biogeochemistry of trace elements in anaerobic digesters

2019

Trace Elements in Anaerobic Biotechnologies

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Essential trace elements (TE) are a prerequisite that ensures optimal performance of the anaerobic digestion (AD) process. However, finding the proper way to deliver these micronutrients to microbial communities is not an easy task. The chemical speciation of TE and the complex environment characterizing AD play a critical role in their mobility, bioavailability, and toxicity. These aspects are particularly

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ADM1 based mathematical model of trace element precipitation/dissolution in anaerobic digestion processes

Cited by 39 publications

References 42 publications

Influence of Pre-Hydrolysis on Sewage Treatment in an Up-Flow Anaerobic Sludge BLANKET (UASB) Reactor: A Review

Influence of Pre-Hydrolysis on Sewage Treatment in an Up-Flow Anaerobic Sludge BLANKET (UASB) Reactor: A Review

Effect of Cobalt, Nickel, and Selenium/Tungsten Deficiency on Mesophilic Anaerobic Digestion of Chemically Defined Soluble Organic Compounds

Biogeochemistry of trace elements in anaerobic digesters

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