Micro–level evaluation of organic compounds transformation in anaerobic digestion under feast and famine conditions assisted by iron–based materials – Revealing the true mechanism of AD enhancement

The addition of magnetic nanoparticles to batch anaerobic digestion was first reported in 2014. Afterwards, the number of works dealing with this subject has been increasing year by year. The discovery of the enhancement of anaerobic digestion by adding iron-based nanoparticles has created a multidisciplinary emerging research field. As a consequence, in the last years, great efforts have been made to understand the enhancement mechanisms by which magnetic nanoparticles (NPs) addition enhances the anaerobic digestion process of numerous organic wastes. Some hypotheses point to the dissolution of iron as essential iron for anaerobic digestion development, and the state of oxidation of iron NPs that can reduce organic matter to methane. The evolution and trends of this novel topic are discussed in this manuscript. Perspectives on the needed works on this topic are also presented.

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Effect of organic compounds on dry anaerobic digestion of food and paper industry wastes

Bioengineered ◽

10.1080/21655979.2020.1752594 ◽

2020 ◽

Vol 11 (1) ◽

pp. 502-509

Author(s):

Anette T. Jansson ◽

Regina J. Patinvoh ◽

Mohammad J. Taherzadeh ◽

Ilona Sárvári Horváth

Keyword(s):

Anaerobic Digestion ◽

Organic Compounds ◽

Paper Industry ◽

Dry Anaerobic Digestion

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Covalent post-synthetic modification of switchable iron-based coordination polymers by volatile organic compounds: a versatile strategy for selective sensor development

Dalton Transactions ◽

10.1039/d0dt01533d ◽

2020 ◽

Vol 49 (22) ◽

pp. 7315-7318 ◽

Cited By ~ 1

Author(s):

Esther Resines-Urien ◽

Lucía Piñeiro-López ◽

Estefania Fernandez-Bartolome ◽

Arturo Gamonal ◽

Mar Garcia-Hernandez ◽

...

Keyword(s):

Volatile Organic Compounds ◽

Organic Compounds ◽

Coordination Polymers ◽

Spin Crossover ◽

Sensor Development ◽

Volatile Organic ◽

Iron Based ◽

Selective Sensor

A covalent post-synthetic modification is applied in one of the most relevant polymers to obtain unprecedented switchable spin crossover (SCO) materials.

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Enhanced solubilisation of the residual fraction of municipal solid waste

Water Science & Technology ◽

10.2166/wst.2008.075 ◽

2008 ◽

Vol 57 (7) ◽

pp. 995-1000 ◽

Cited By ~ 8

Author(s):

D. G. Cirne ◽

V. B. Agbor ◽

L. Björnsson

Keyword(s):

Anaerobic Digestion ◽

Organic Compounds ◽

Methane Production ◽

Waste Incineration ◽

The Other ◽

Residual Fraction ◽

Cellulolytic Enzymes ◽

Digestion Time ◽

Two Stage ◽

Digestion Process

The Swedish ordinance banning the landfilling of organic material after 2005 has led to rapid developments towards waste incineration, while biological alternatives have been less studied. In this study, biological alternatives for enhanced methane production from residual municipal waste (the remaining waste fraction after source separation) are investigated. The strategies investigated were recirculation of leachate, recirculation of leachate with aeration, flooding of the solid bed, and enzyme addition after initial leaching in an anaerobic, batch, two-stage digestion process with recirculation of digested leachate. The degree of solubilisation of organic compounds achieved was higher for initial digestion in a two-stage anaerobic digestion system followed by the addition of cellulolytic enzymes than in the other strategies investigated. The overall net solubilisation achieved was 0.48 g COD/g VSadded corresponding to an increase of 34%. In addition, the digestion time was considerably reduced using this strategy. For the other strategies investigated the solubilisation yields obtained were similar, 0.31 g COD/g VSadded.

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Anaerobic digestion of C1–C4 light oxygenated organic compounds derived from the torrefaction of lignocellulosic materials

Fuel Processing Technology ◽

10.1016/j.fuproc.2014.11.012 ◽

2015 ◽

Vol 131 ◽

pp. 150-158 ◽

Cited By ~ 14

Author(s):

Shi-Shen Liaw ◽

Craig Frear ◽

Wayne Lei ◽

Shuai Zhang ◽

Manuel Garcia-Perez

Keyword(s):

Anaerobic Digestion ◽

Organic Compounds ◽

Lignocellulosic Materials

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Effects of sludge properties in a combined process of mesophilic anaerobic digestion and thermophilic aerobic digestion

E3S Web of Conferences ◽

10.1051/e3sconf/202019404015 ◽

2020 ◽

Vol 194 ◽

pp. 04015

Author(s):

Zehua Zhao ◽

Yuanshun Xu ◽

Tianfeng Wang ◽

Xiaowei Xu ◽

Houhu Zhang ◽

...

Keyword(s):

Anaerobic Digestion ◽

Organic Compounds ◽

Retention Time ◽

Capillary Water ◽

Extracellular Polymers ◽

Aerobic Digestion ◽

Conventional Activated Sludge ◽

Sludge Stabilization ◽

Sludge Properties ◽

Thermophilic Aerobic Digestion

The combination of mesophilic anaerobic digestion and thermophilic aerobic digestion (MAN-TAD) has been recognized as a suitable technology to deal with conventional activated sludge. The MAN-TAD system can make sludge achieve better stability. The retention time of anaerobic digestion (AD-time) had an important role in the sludge stabilization process. With the extension of anaerobic digestion retention time, MAN-TAD system can make sludge achieve better stability. In comparison, volatile/total solids ratio (VS/TS) at AD-time of 38 d presented the lowest values among the three different AD-time with the value of 0.32. Long retention time of anaerobic digestion resulted in high amounts of soluble organic compounds (SCOD), and extracellular polymers (EPS) in the supernatant. Such high amount of organic compounds caused deterioration in sludge dewaterability. Compared with sludges of AD-time 17 d and 24 d, sludge of AD-time 38 d became extremely difficult to dewater due to its high capillary water absorption time (CST) at the end of digestion.

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