Anaerobic batch conversion of pine wood torrefaction condensate

Doddapaneni, Tharaka Rama Krishna C.; Praveenkumar, Ramasamy; Tolvanen, Henrik; Palmroth, Marja R.T.; Konttinen, Jukka; Rintala, Jukka

doi:10.1016/j.biortech.2016.11.073

Cited by 30 publications

(23 citation statements)

References 24 publications

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“…Here we used torrefied biomass, for the first time, to adsorb furfural from the torrefaction condensate in order to improve the prospects of utilizing torrefaction condensate in anaerobic digestion. Adsorption of furfural was studied in detail, as it is the major inhibitory compound present in torrefaction condensate [4,5]. The adsorption efficiency of torrefied biomass was tested using standard furfural solution by means of batch experiments by varying pH and biomass dosage and further evaluated through kinetic modelling.…”

Section: <Figure 1>mentioning

confidence: 99%

“…Torrefied biomass and torrefaction condensate were produced as described by Doddapaneni et al [5]. Briefly, Finnish pine wood chips were air dried at 105 ⁰C for 24 h in an electrically heated oven.…”

Section: Torrefaction Processmentioning

confidence: 99%

“…However, owing to their high water and CO2 content, the torrefaction volatiles have low heating value. In addition, presence of different types of organic acids makes them very corrosive to the combusting equipment [1,4,5] Hence, advanced process integration approaches are required for better utilization of torrefaction volatiles and thereby improving the overall efficiency and economic viability of the torrefaction system [4,5] The torrefaction condensate (obtained by condensing the volatiles) mainly contains water and acetic acid. Recently, Doddapaneni et al [5] reported that torrefaction condensate, with ~50 g/L of acetic acid, can be used as substrate for anaerobic digestion (AD) for bio-methane production.…”

Section: Introductionmentioning

confidence: 99%

“…Other study [8] reported that the adsorption of phenol and furfural from oat hull hydrolysate using powdered activated carbon improved the bioproduction of xylitol by 10%. However, due to the large concentration of furfural (6000 -11000 mg/L) in the torrefaction condensate [4,5,9], a cheap and readily available adsorbent with reasonable adsosrption capacity is required. Torrefied biomass could be an alternative adsorbent due to their hydrophobic nature as furfural is also hydrophobic, cost-effectiveness and easy availability .…”

Section: Introductionmentioning

confidence: 99%

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Adsorption of furfural from torrefaction condensate using torrefied biomass

Doddapaneni

Jain

Praveenkumar

et al. 2018

Chemical Engineering Journal

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Section: <Figure 1>mentioning

confidence: 99%

Section: Torrefaction Processmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Adsorption of furfural from torrefaction condensate using torrefied biomass

Doddapaneni

Jain

Praveenkumar

et al. 2018

Chemical Engineering Journal

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“…The composition of the condensables from wheat straw torrefaction has been extensively studied in the past [23,24], but only a few studies on condensables utilization can be found in the available literature. These studies mainly concern condensables from woody biomass torrefaction and their applications as biodegradable pesticides [25], wood protection agents [26], or anaerobic digestion substrates [27]. The method of condensables utilization differs for different feedstocks as well as for different process parameters.…”

Section: Introductionmentioning

confidence: 99%

Torrefaction of Agricultural Residues: Effect of Temperature and Residence Time on the Process Products Properties

Jagodzińska

Czerep

Kudlek

et al. 2020

Journal of Energy Resources Technology

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To date, few studies on the potential utilization of agricultural residue torrefaction products have been performed. Thus, torrefaction product characterization aimed at its potential utilization was performed. Wheat-barley straw pellets and wheat-rye chaff were used in the study. The impact of the torrefaction temperature (280-320°C) on polycyclic aromatic hydrocarbons (PAHs) content in the biochar and noncondensable gas (noncondensables) composition was investigated. The impact of the torrefaction time (30-75 min) on the composition of the condensable volatiles (condensables) and their toxicity were also studied. The torrefaction process was performed in a batch-scale reactor. The PAH contents were measured using high-performance liquid chromatography (HPLC), and the noncondensables composition was measured online using a gas analyzer and then gas chromatograph with flame ionization detector (GC-FID). The condensables composition and main compound quantification were determined and quantified using gas chromatography-mass spectrometry (GC/MS). Three toxicity tests, for saltwater bacteria (Microtox ® bioassay), freshwater crustaceans (Daphtoxkit F magna ® ), and vascular plants (Lemna sp. growth inhibition test), were performed for the condensables. The PAHs content in the biochar, regardless of the torrefaction temperature, allows them to be used in agriculture. The produced torgas shall be co-combusted with full-caloric fuel because of its low calorific value. Toxic compounds (furans and phenols) were identified in the condensable samples, and regardless of the processing time, the condensables were classified as highly toxic. Therefore, they can be used either as pesticides or as an anaerobic digestion substrate after their detoxification.

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