Anaerobic Digestion of Waste Water from Hydrothermal Carbonization of Corn Silage

Wirth, Benjamin; Mumme, Jan

doi:10.2478/apbi-2013-0001

Cited by 83 publications

(119 citation statements)

References 17 publications

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“…So, despite higher energy potential, fresh digestate cannot be used directly as a solid fuel. It would need to be dried right after the digestion 20 .…”

Section: Discussionmentioning

confidence: 99%

“…However, HTL requires very high pressure (250 bar) compare to HTC (10-50 bar), which implies a high installation and operation costs than HTC. Again, the combination sequence of AD and HTC can be questioned as Wirth et al recently reported AD of HTC process liquid 20 . However, an effective AD depends on the sugar concentration in the feedstocks.…”

Section: Introductionmentioning

confidence: 99%

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Evaluation of Integrated Anaerobic Digestion and Hydrothermal Carbonization for Bioenergy Production

Reza

Werner

Pohl

et al. 2014

JoVE

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Lignocellulosic biomass is one of the most abundant yet underutilized renewable energy resources. Both anaerobic digestion (AD) and hydrothermal carbonization (HTC) are promising technologies for bioenergy production from biomass in terms of biogas and HTC biochar, respectively. In this study, the combination of AD and HTC is proposed to increase overall bioenergy production. Wheat straw was anaerobically digested in a novel upflow anaerobic solid state reactor (UASS) in both mesophilic (37 °C) and thermophilic (55 °C) conditions. Wet digested from thermophilic AD was hydrothermally carbonized at 230 °C for 6 hr for HTC biochar production. At thermophilic temperature, the UASS system yields an average of 165 L CH4 /kg VS (VS: volatile solids) and 121 L CH4 /kg VS at mesophilic AD over the continuous operation of 200 days. Meanwhile, 43.4 g of HTC biochar with 29.6 MJ/kg dry_biochar was obtained from HTC of 1 kg digestate (dry basis) from mesophilic AD. The combination of AD and HTC, in this particular set of experiment yield 13.2 MJ of energy per 1 kg of dry wheat straw, which is at least 20% higher than HTC alone and 60.2% higher than AD only.

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“…So, despite higher energy potential, fresh digestate cannot be used directly as a solid fuel. It would need to be dried right after the digestion 20 .…”

Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Evaluation of Integrated Anaerobic Digestion and Hydrothermal Carbonization for Bioenergy Production

Reza

Werner

Pohl

et al. 2014

JoVE

Self Cite

View full text Add to dashboard Cite

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“…The wash-waters contain organic C and N whose concentration should be reduced prior to disposal. One possible way of removing the organic compounds of the wash water is to perform anaerobic treatment as is done with the HTC-process liquor (Wirth and Mumme 2013), and methane would be produced concomitantly.…”

Section: Nitrous Oxide Emissionsmentioning

confidence: 99%

Effect of Hydrothermally Carbonized Hemp Dust on the Soil Emissions of CO2 and N2O

Dicke

Lühr

Ellerbrock

et al. 2015

BioRes

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The impact on carbon dioxide (CO2) and nitrous oxide (N2O) emissions when applying hydrothermally carbonized (HTC) char to soil was investigated in a laboratory experiment with two HTC chars made from hemp (Cannabis sativa L.) dust and incubated for 131 d. Two fractions of hemp dust were collected during fiber processing (from fractionation and suction) and were carbonized at 230 °C for 6 h in water. Non-treated and water-washed HTC chars were used in incubation experiments, doubling the carbon concentration of the soil. As a result of adding HTC char to soil, CO2 emissions increased significantly in all cases compared to the control treatment. Washing the HTC chars easily removed dissolvable carbon (C) compounds, which significantly decreased CO2 emissions. Nitrous oxide emissions, following the incorporation of HTC char, did not differ from those of the control sample; however, washed HTC char treatments tended to emit less N2O than the corresponding unwashed samples. Hydrothermally carbonized char obtained from the suction of dust may play a greater role as a soil conditioner than HTC char from dust by fractionation because dust from suction accumulates to a larger degree during hemp fiber processing.

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“…Hydrothermal liquefaction (HTL) process converts wet biomass under subcritical temperature (280˚C -374˚C) and pressure (10)(11)(12)(13)(14)(15)(16)(17)(18)(19)(20)(21)(22)(23)(24)(25) to aqueous, solid char and gaseous products wherein process conditions, catalyst and biomass feedstock dictate product composition, distribution and yield [1] [2]. We have reported sub-critical HTL of lignocellulosic biomass (LCB) using homogeneous acid (Ca and Ni nitrate) catalyst [3] [4].…”

Section: Introductionmentioning

confidence: 99%

“…Therefore, a continuous HTL reactor operation will likely face persistent challenge of wastewater disposal. Alternatives such as catalytic hydrothermal gasification [9], photoreforming for H 2 production [10], anaerobic digestion for methane production [11] have been investigated to recover organic components of the AP. Another route which is microbe mediated capture of AP carbon and nutrients is more appealing because it will simultaneously reduce the ) of organic carbon [22].…”

Section: Introductionmentioning

confidence: 99%

Evaluation of Aqueous Product from Hydrothermal Liquefaction of Cardboard as Bacterial Growth Medium: Co-Liquefaction of Cardboard and Bacteria for Higher Bio-Oil Production

Shende¹,

Wei²,

Kodzomoyo³

et al. 2017

JSBS

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Hydrothermal liquefaction (HTL) processing of lignocellulosic biomass to bio-oil produces aqueous co-product (AP) which contains significant (~40 wt%) carbon from the original feedstock. This study evaluates macro and micronutrient composition of AP from Ca(NO 3 ) 2 catalyzed HTL of cardboard (CbAP) to cultivate bacteria. HPLC, GC-MS and ICP-MS analysis of CbAP revealed presence of C1-C3 carboxylic acids, aldehydes, ketones, phenolics, sub-optimal phosphorous and bio-incompatible levels of calcium. Dilutions (5 -80 vol%) of detoxified CbAP (DTP-CbAP) in potassium phosphate buffer (pH 7.2) were supplemented with 50 mg·mL −1 of yeast extract and inoculated with metabolically versatile Enterobacter species. The cultures were incubated at 25˚C under aerobic conditions. A maximum 9.4 fold increase in the dry cell weight was observed in DTP-CbAP-15 vol%. Co-liquefaction of the bacteria with cardboard in 1:1 and 1:3 weight ratios each produced ~33% more total bio-oil. These had higher HHVs of 34.11 and 31.05 MJ·kg −1, respectively compared with bio-oil from cardboard feedstock alone which had HHV of 30.61 MJ·kg −1. The study highlights the challenges in cultivating microbes in AP from HTL of lignocellulosic biomass (LCB) and the possibility to integrate microbial capture and recycle of the AP carbon for enhanced bio-oil production and quality.

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Anaerobic Digestion of Waste Water from Hydrothermal Carbonization of Corn Silage

Cited by 83 publications

References 17 publications

Evaluation of Integrated Anaerobic Digestion and Hydrothermal Carbonization for Bioenergy Production

Evaluation of Integrated Anaerobic Digestion and Hydrothermal Carbonization for Bioenergy Production

Effect of Hydrothermally Carbonized Hemp Dust on the Soil Emissions of CO2 and N2O

Evaluation of Aqueous Product from Hydrothermal Liquefaction of Cardboard as Bacterial Growth Medium: Co-Liquefaction of Cardboard and Bacteria for Higher Bio-Oil Production

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