Alkaline hydrothermal liquefaction of swine carcasses to bio-oil

Zheng, Jia Wei; Zhu, Ming-Qiang; HaiTang, Wu

doi:10.1016/j.wasman.2015.05.010

Cited by 60 publications

(18 citation statements)

References 45 publications

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“…However, higher P dissolution was also found at 200°C for 0 min of retention time, probably due to a shorter retention time at higher temperature. Depolymerization is the dominant reaction during the initial stage of HTT, while repolymerization is usually active at later stage (Zheng et al, 2015). This observation is also in agreement with Aida et al (2017) who obtained a higher P concentration in the water-soluble fraction after HTT at 250°C and 350°C for 10 min.…”

Section: Discussionsupporting

confidence: 90%

Fertilizer potential of liquid product from hydrothermal treatment of swine manure

et al. 2018

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Compared with composting, hydrothermal treatment (HTT) technology can dramatically shorten the duration for manure waste treatment. This study firstly investigated the effect of HTT on solubilization of N, P and organics from swine manure, and then evaluated the phytotoxicity of liquid product from hydrothermally treated manure by seed germination test. Results show that 98% of N in manure could be converted into soluble form after HTT at 200 °C for 60 min. Soluble P in hydrothermally treated manure (at 150 °C for 60 min) was 2.7 times that in raw manure. The germination indices (GI) were all greater than 100% when the liquid product (from HTT at 150 °C for 60 min) or its diluted samples being used. Results from this study suggest that HTT could be a promising technology for producing safe and value-added liquid fertilizers from swine manure.

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Section: Discussionsupporting

confidence: 90%

Fertilizer potential of liquid product from hydrothermal treatment of swine manure

et al. 2018

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“…A much larger number of papers report HTL applied to micro algae [29], or forestry and agricultural wastes [48 65]. In the field of food processing residues, HTL was effectively applied to wastes from meat industries such as offal [66,67], carcasses [68] or manure [69 72]. As well, hydrothermal liquefaction of fish pro cessing residues was reported [ 73 75].…”

Section: Main Factors Influencing Hydrothermal Liquefactionmentioning

confidence: 99%

Energy valorisation of food processing residues and model compounds by hydrothermal liquefaction

Déniel

Haarlemmer

Roubaud

et al. 2016

Renewable and Sustainable Energy Reviews

161

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International audienceThe upcoming depletion of fossil fuels calls for the development of alternative energies produced from renewable resources. Particularly, energy valorisation of agriculture and food processing wastes is one of the most promising tools for renewable energy production. The amount of food wastes is rapidly increasing due to urbanisation, industrialisation and population growth worldwide. They consequently represent a widely available resource, and their use as a raw material allows reducing the environmental cost associated with their disposal. These resources usually have high moisture content, making dry valorisation processes unattractive because of a costly drying step prior to conversion. Hydrothermal processes are conversely particularly well suited for the valorisation of wet organic wastes in an economical way, since they use water as the reaction medium. More specifically, liquid fuels can be produced using hydrothermal liquefaction (HTL). The process converts wet biomass into a crude-like oil with higher heating values up to 40 MJ/kg using subcritical water (T=250-370 degrees C, P=10-30 MPa). Though this is an active research area, the mechanisms of hydrothermal liquefaction still remain unclear today. Some processes have already been developed at the pilot scale for valorising food processing wastes. However, the development of HTL processes at industrial scales is facing technological and economic challenges. This paper discusses the two main issues to address for development of the process at large scales. On the one hand, hydrothermal conversion of food processing residues and model compounds is necessary to better understand the fundamentals of hydrothermal liquefaction. As well, technological and process integration issues have to be addressed to ensure economic viability of commercial HTL processes

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“…(Zhang, et al, 2007), heavy fuel oil (Oasmaa, et al, 1999), and BO of alkaline HTL swine carcasses (Zheng, et al, 2015) and specification EN590. The HHV of liquefied BO from OMWW was 37.92 MJ/kg, which represent approximately 90% of that of heavy petroleum fuel oil and it is higher than the HHV of other oils.…”

Section: Characterization Of the Liquid/solid Productsmentioning

confidence: 99%

Hydrothermal liquefaction of oil mill wastewater for bio-oil production in subcritical conditions

Hadhoum

Balistrou

Burnens

et al. 2016

Bioresource Technology

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:The main purpose of this study is to investigate the direct hydrothermal liquefaction of oil mill wastewater (OMWW). Experiments were carried out at different temperatures (240-300 _C), water contents (58-88 wt.%) and reaction times (15-45 min). Results show that the highest bio-oil yield was about 58 wt.%, resulting in a higher heating value of 38 MJ/kg. This was conducted at the following optimal conditions: water content 88 wt.%, a temperature of 280 _C, and 30 min as reaction time. To put bio-oil into wide application, the various physical and chemical characteristics were determined. A detailed chemical composition analysis of bio-oil was performed by gas chromatography-mass spectrometry (GC-MS) coupled with a flame ionization detector (FID). The dominant compounds were identified by using NIST library. Analyses show that the bio-oil contains mainly oleic acid, hexadecanoic acid, fatty acid methyl ester, fatty acid ethyl ester, amino acid derived compounds and phenolic compounds.

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Alkaline hydrothermal liquefaction of swine carcasses to bio-oil

Cited by 60 publications

References 45 publications

Fertilizer potential of liquid product from hydrothermal treatment of swine manure

Fertilizer potential of liquid product from hydrothermal treatment of swine manure

Energy valorisation of food processing residues and model compounds by hydrothermal liquefaction

Hydrothermal liquefaction of oil mill wastewater for bio-oil production in subcritical conditions

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