Effect of trace element addition and increasing organic loading rates on the anaerobic digestion of cattle slaughterhouse wastewater

Schmidt, Thomas; McCabe, Bernadette K.; Harris, Peter; Lee, Seonmi

doi:10.1016/j.biortech.2018.05.050

Cited by 55 publications

(21 citation statements)

References 25 publications

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“…Other studies have reported SW methane yields between 300 and 800 mL/g-VS. For example, a biogas yield of 443 mL/g-VS was obtained during the digestion of SW at a I/S ratio of 4 (Latifi et al, 2019). Also, a biogas yield of 425 mL/g-COD was obtained after SW water digestion with an OLR of 1.82 g•(L d) −1 (Schmidt et al, 2018). These results are close to biogas yields obtained in this paper.…”

Section: Degradability Of Pork Products After Htpsupporting

confidence: 86%

Effects of Hydrothermal Pretreatment and Hydrochar Addition on the Performance of Pig Carcass Anaerobic Digestion

Lin

Sheng

2021

Front. Microbiol.

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Proper disposal and utilization of dead pig carcasses are problems of public concern. The combination of hydrothermal pretreatment (HTP) and anaerobic digestion is a promising method to treat these wastes, provided that digestion inhibition is reduced. For this reason, the aim of this work was to investigate the optimal HTP temperature (140–180°C) for biogas production during anaerobic digestion of dead pigs in batch systems. In addition, the effects of hydrochar addition (6 g/L) on anaerobic digestion of pork products after HTP in continuous stirred tank reactors (CSTR) were determined. According to the results, 90% of lipids and 10% of proteins present in the pork were decomposed by HTP. In addition, the highest chemical oxygen demand (COD) concentration in liquid products (LP) reached 192.6 g/L, and it was obtained after 170°C HTP. The biogas potential from the solid residue (SR) and LP was up to 478 mL/g-VS and 398 mL/g-COD, respectively. A temperature of 170°C was suitable for pork HTP, which promoted the practical biogas yield because of the synergistic effect between proteins and lipids. Ammonia inhibition was reduced by the addition of hydrochar to the CSTR during co-digestion of SR and LP, maximum ammonia concentration tolerated by methanogens increased from 2.68 to 3.38 g/L. This improved total biogas yield and degradation rate of substrates, reaching values of 28.62 and 36.06%, respectively. The acetate content in volatile fatty acids (VFA) may be used as an index that reflects the degree of methanogenesis of the system. The results of the present work may also provide guidance for the digestion of feedstock with high protein and lipid content.

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Section: Degradability Of Pork Products After Htpsupporting

confidence: 86%

Effects of Hydrothermal Pretreatment and Hydrochar Addition on the Performance of Pig Carcass Anaerobic Digestion

Lin

Sheng

2021

Front. Microbiol.

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“…The addition of TEs resulted in enhanced degradation efficiency, increased biogas production and an improved process stability. Higher OLR and lower HRT were achieved with TEs supplementation in comparison to the control digesters; control reactors exhibited a process failure at OLR 25% lower than the maximum investigated in the test and that achieved with TE supplementation (Schmidt et al, 2018).…”

Section: Organic Loading Ratementioning

confidence: 74%

“…Semi-continuous digestion tests were conducted in 2 L stirred tank reactors at 38°C fed with cattle slaughterhouse wastewater; increasing the OLR step-wise from 0.3 to 2.76 g COD L −1 d −1 with a corresponding decrease in HRT throughout 170 days of monitoring (Schmidt et al, 2018). The TE solution consisting of Fe, Ni, Co, Mn, Mo was added daily to three digesters to reach optimal concentrations (Lemmer et al, 2008) and the remaining three reactors were used as controls.…”

Section: Organic Loading Ratementioning

confidence: 99%

Engineering of trace-element supplementation

Roussel¹,

Carliell-Marquet²,

Braga³

et al. 2019

Trace Elements in Anaerobic Biotechnologies

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Anaerobic digestion industries need to achieve higher performance and strive harder to play a key role in the green future of the energy sector. The importance of trace elements (TE) in the welfare of anaerobic bioreactors must be taken into account by the stakeholder/user to achieve these objectives. However, the implementation of a TE strategy is often stopped by its complexity, a lack of resource and the economic reality of a full-scale operating plant. The aim of this chapter is to support the translation of academic research findings to the engineering and operating of fullscale plant. Management tools have been developed to help operator and stakeholder in their TE assessment of their anaerobic digestion (AD) plant and suggest potential strategies to overcome deficiency. It is essential to understand the key elements of the AD system when developing the TE strategy. Feedstock

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“…Still, several studies proved that nitrogen rich feedstock can be digested without huge process instabilities even on a long term (Ortner et al, 2014(Ortner et al, , 2015b. Specifically the addition of trace elements showed stabilizing properties during anaerobic digestion of nitrogen rich feedstock like blood and also during anaerobic wastewater treatment (Ortner et al, 2015a;Schmidt et al, 2018).…”

Section: Slaughterhousesmentioning

confidence: 99%

Anaerobic Digestion of Pretreated Industrial Residues and Their Energetic Process Integration

Bochmann

Pesta

Rachbauer

et al. 2020

Front. Bioeng. Biotechnol.

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The food and beverage industry offers a wide range of organic feedstocks for use in biogas production by means of anaerobic digestion (AD). Microorganisms convert organic compounds-solid, pasty, or liquid ones-within four steps to biogas mainly consisting of CH 4 and CO 2. Therefore, various conversion technologies are available with several examples worldwide to show for the successful implementation of biogas technologies on site. The food and beverage industry offer a huge potential for biogas technologies due to the sheer amount of process residues and their concurrent requirement for heat and power. The following study analyzes specific industries with respect to their implementation potential based on arising waste and heat and power demand. Due to their chemical composition, several feedstocks are resistant against microbiological degradation to a great extent. A combination of physical-, chemical-, and microbiological pretreatment are used to increase the biological availability of the feedstock. The following examples will discuss how to best implement AD technology in industrial processes. The brewery industry, dairy production, slaughterhouses, and sugar industry will serve as examples.

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Effect of trace element addition and increasing organic loading rates on the anaerobic digestion of cattle slaughterhouse wastewater

Cited by 55 publications

References 25 publications

Effects of Hydrothermal Pretreatment and Hydrochar Addition on the Performance of Pig Carcass Anaerobic Digestion

Effects of Hydrothermal Pretreatment and Hydrochar Addition on the Performance of Pig Carcass Anaerobic Digestion

Engineering of trace-element supplementation

Anaerobic Digestion of Pretreated Industrial Residues and Their Energetic Process Integration

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