ADM1-based methodology for the characterisation of the influent sludge in anaerobic reactors

Huete, Estíbaliz; Gracia, M. de; Ayesa, E.; García-Heras, J. L.

doi:10.2166/wst.2006.537

Cited by 31 publications

(12 citation statements)

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“…In general, the waste activated sludge (WAS) mainly consisted of protein and carbohydrate. During anaerobic digestion, 1 g of protein (C 4 H 6.1 O 1.2 N, equivalent to 1.53 g of COD) and carbohydrate (C 6 H 10 O 5 , equivalent to 1.18 g of COD) can theoretically produce methane at 0.59 and 0.45 L CH 4 , respectively 20 . In contrast, 1 g of PHA (C 4 H 6 O 2 , equivalent to 1.67 g of COD) can theoretically generate more CH 4 (0.65 L CH 4 /g PHA) in comparison with protein and carbohydrate 21 .…”

Section: Discussionmentioning

confidence: 99%

Polyhydroxyalkanoates in waste activated sludge enhances anaerobic methane production through improving biochemical methane potential instead of hydrolysis rate

Wang

Sun

Zhang

et al. 2016

Sci Rep

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Anaerobic sludge digestion is the main technology for sludge reduction and stabilization prior to sludge disposal. Nevertheless, methane production from anaerobic digestion of waste activated sludge (WAS) is often restricted by the poor biochemical methane potential and slow hydrolysis rate of WAS. This work systematically investigated the effect of PHA levels of WAS on anaerobic methane production, using both experimental and mathematical modeling approaches. Biochemical methane potential tests showed that methane production increased with increased PHA levels in WAS. Model-based analysis suggested that the PHA-based method enhanced methane production by improving biochemical methane potential of WAS, with the highest enhancement being around 40% (from 192 to 274 L CH4/kg VS added; VS: volatile solid) when the PHA levels increased from 21 to 143 mg/g VS. In contrast, the hydrolysis rate (approximately 0.10 d−1) was not significantly affected by the PHA levels. Economic analysis suggested that the PHA-based method could save $1.2/PE/y (PE: population equivalent) in a typical wastewater treatment plant (WWTP). The PHA-based method can be easily integrated into the current WWTP to enhance methane production, thereby providing a strong support to the on-going paradigm shift in wastewater management from pollutant removal to resource recovery.

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Section: Discussionmentioning

confidence: 99%

Polyhydroxyalkanoates in waste activated sludge enhances anaerobic methane production through improving biochemical methane potential instead of hydrolysis rate

Wang

Sun

Zhang

et al. 2016

Sci Rep

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“…The ADM1 assumes that this fraction returns directly to the complex particulate pool, lumped in the fraction X c . Such mechanism is reasonable when dealing with secondary sludge AD, as the substrate and the active biomass show comparable composition (mainly biomass) and physical characteristics (colloidal nature), but fails in theoretical rigor when the substrates have completely different nature (Huete et al, 2006;Yasui et al, 2008). In this study, we focused on the characterization of the disintegration step in order to simulate batch experimental results on anaerobic degradation of TPS and TF.…”

Section: Modeling Anaerobic Digestion Of Tannery Wastementioning

confidence: 99%

Modeling the Disintegration Process in Anaerobic Digestion of Tannery Sludge and Fleshing

Polizzi

Alatriste‐Mondragón

Munz

2017

Front. Environ. Sci.

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Mathematical modeling of anaerobic digestion (AD) is widely acknowledged as a powerful tool to v of the process and to support full-scale plant design, operation and optimization. In this work, a modified version of the IWA-ADM1 model is proposed to simulate the AD of tannery primary sludge (TPS) and fleshing, with special emphasis on the disintegration formulation. Multiple batch tests were performed at different inoculum/substrate VS-mass ratio, in order to evaluate the biodegradability of the two substrates and to provide experimental data for modeling purposes. Beside the necessary adjustments of substrates' COD fractionation, the structure modifications of the model focused on the disintegration and hydrolysis. The Contois Monod-based model was adopted to describe disintegration kinetics and the results were compared to the traditionally adopted first-order kinetic. The fate of particulate matter generated from biomass lysis was also questioned and a new model variable was introduced to account for cellular lysis products. Finally, a further modification differentiated substrate particulate matter into a readily and a slowly hydrolysable fraction. Batch tests confirmed that TPS and fleshing are suitable substrates for AD, exhibiting specific methane productions of: 0.26 ± 0.06 and 0.47 ± 0.05 Nm 3 Kg −1 VS, respectively. Modeling results showed that the proposed modifications were crucial for successful simulation of experimental data referring to fleshing, whereas did not have a significant effect on the results related to primary sludge degradation. This work is the first application of an IWA-ADM1-based model to AD of tannery waste.Keywords: anaerobic digestion, tannery waste, modeling, ADM1, hydrolysis INTRODUCTIONLeather industry comprises a chain of processes required to transform raw animal hides into the finished product. A large amount of tannery wastewater and of solid waste is generated throughout the process, especially in the highly water-demanding pre-tanning phases. Dedicated wastewater treatment plants are often conceived to treat tannery pollutant load, characterized by high concentrations of organic matter (including recalcitrant compounds), ammoniacal nitrogen, sulfide and salts (Mannucci et al., 2010). Tannery fleshing (TF) represents the main solid waste; it originates from the removal of animal tissue from the raw hide, usually after liming process (de-haring phase). Tannery primary sludge (TPS) and TF has been traditionally disposed in landfill or incinerated. In the last decades, new stringent regulations and environmental policies Polizzi et al. Modeling Anaerobic Digestion of Tannery Wastehave been encouraging alternative eco-friendly treatments, worldwide. Among them, anaerobic digestion (AD) has been acknowledged as a valuable solution for the treatment of a wide variety of organic waste, whose multiple advantages range from waste volume reduction to renewable energy production and cost-effective management. AD of tannery-originated wastes found its first applications in the late...

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“…Interfacing activated sludge with anaerobic digestion and addressing the general problems associated with the composite material in ADM1 have been some of the most intensively addressed topics since Benchmarking of Control Strategies for Wastewater Treatment Plants ADM1 was published (e.g., Copp et al 2003;Huete et al 2006;Kleerebezem & van Loosdrecht, 2006;Vanrolleghem et al 2005b;Volcke et al 2006b;Wett et al 2006). There are several important issues that have been addressed with this BSM2 interface.…”

Section: Further Remarksmentioning

confidence: 99%

Benchmarking of Control Strategies for Wastewater Treatment Plants

Gernaey¹,

Jeppsson

Vanrolleghem

et al. 2014

116

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ADM1-based methodology for the characterisation of the influent sludge in anaerobic reactors

Cited by 31 publications

References 0 publications

Polyhydroxyalkanoates in waste activated sludge enhances anaerobic methane production through improving biochemical methane potential instead of hydrolysis rate

Polyhydroxyalkanoates in waste activated sludge enhances anaerobic methane production through improving biochemical methane potential instead of hydrolysis rate

Modeling the Disintegration Process in Anaerobic Digestion of Tannery Sludge and Fleshing

Benchmarking of Control Strategies for Wastewater Treatment Plants

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