Incorporating hydrothermal liquefaction into wastewater treatment – Part I: Process optimization for energy recovery and evaluation of product distribution

Liu, Huan; Başar, İbrahim Alper; Lyczko, Nathalie; Nzihou, Ange; Eskicioğlu, Çiğdem

doi:10.1016/j.cej.2022.137838

Cited by 22 publications

(12 citation statements)

References 125 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…With the increase of temperature, the cyclization of DOM was obvious to generate a large number of cyclized substances with conjugated structures, such as cyclic ketones (alicyclic), Nheterocyclic, and PAHs, which were mainly derived from PSs, PNs, and HAs, respectively (Figure 5). 52 According to the analysis in Section 3.1, the alicyclic emits fluorescence mainly at C300 and C380, while C355, C405, and C445 are mainly associated with N-heterocycles, and the fluorescence at C300, C380, and C400 also derived from benzenes with conjugated structures. In addition, all fluorescent structures may originate from the addition, polymerization, and cross-linking products of these organics, and the fluorescence at C355, C405, and C445 may be affected by the N-heterocyclic compounds and C400 affected by polycyclic compounds with 2−5 rings.…”

Section: Verifying the Sources Of The Fluorescent Structuresmentioning

confidence: 99%

In-Depth Identification of the Sources and Features of Organic Fluorescent Structures in the Sewage Sludge Hydrothermal Aqueous Phase

Liu,

Jin,

Zhao

et al. 2024

ACS EST Water

View full text Add to dashboard Cite

Fluorophores in natural water are usually considered to be humic acid-like and protein-like compounds, while the fluorophores in the hydrothermal carbonization aqueous phase (HTC-AP) prepared under intense hydrothermal conditions (160−280 °C and 2−10 MPa) may not be these compounds. For that, we employed hydrogen nuclear magnetic resonance, Raman spectra, and gas chromatography-mass spectrometry analysis to recognize fluorophores. The results indicate that the fluorescent structures in HTC-AP are mainly rigid planar structures with large conjugated systems resulting from hydrothermal condensation and cross-linking reactions, including aromatics, N-heterocyclics, and alicycles. Specifically, nitrogencontaining heterocycles may be the fluorescence sources of C355 (Em/Ex = 355/275 nm), C405 (Em/Ex = 405/260, 345 nm), and C445 (Em/Ex = 445/ 250, 360 nm) compounds in HTC-AP. In comparison, the fluorescence sources of C300 (Em/Ex = 300/270 nm) and C380 (Em/Ex = 380/315 nm) include alicyclic compounds and aromatic organics, and aromatic organics are the only fluorescence source of C400 (Em/Ex = 400/250, 300 nm). The C300 and C380 component fluorescences are mainly provided by low-molecular-weight organics and hydrophobic acids, respectively. The source of the fluorescent organics was verified using the Fe(II)-based advanced oxidation system. This study can provide a reference to facilitate the simple identification of organics in HTC-AP.

show abstract

Section: Verifying the Sources Of The Fluorescent Structuresmentioning

confidence: 99%

In-Depth Identification of the Sources and Features of Organic Fluorescent Structures in the Sewage Sludge Hydrothermal Aqueous Phase

Liu,

Jin,

Zhao

et al. 2024

ACS EST Water

View full text Add to dashboard Cite

show abstract

“…The capacitance performance of EESDs is strongly determined by their electrode materials. 3 However, a major challenge in the development of EESDs is the regulated preparation of electrode materials with long life, low cost, and high storage capacity. 4 Thus, the synthesis of a wide range of functional materials via facile, eco-friendly, and cost-effective ways can appropriately deal with the challenges related to both current and future strategies.…”

Section: Introductionmentioning

confidence: 99%

“…In recent years, the solid byproduct (also dened as hydrochar) from HTL and HTG has gained increasing attention. 3,[65][66][67] Regarding HTL, it involves the thermochemical conversion of biomass into biocrude in a hot and pressurized water environment with sufficient residence time. 68 Extensive attention has been paid to bio-crude oils and chemicals from the HTL process, whereas relatively fewer studies have focused on the production of hydrochar.…”

Section: Introductionmentioning

confidence: 99%

Sustainable hydrothermal carbon for advanced electrochemical energy storage

Zhang,

Cao,

Zhang

et al. 2024

J. Mater. Chem. A

View full text Add to dashboard Cite

show abstract

“…To mitigate the overall impact on the local society, we intend to integrate the Dipterocarpus caudatus waste as feedstock and initiate a sustainable economic system, otherwise known as a circular economy. Recent research showed that there is an emerging trend in connecting hydrothermal processing with locally sourced feedstocks [19,35]. By converting biomass into fermentable sugars, we extract value from waste and turn it into a sustainable renewable energy resource.…”

Section: Introductionmentioning

confidence: 99%

Sustainable Valorization of Wood Residue for the Production of Biofuel Materials Via Continuous Flow Hydrothermal Liquefaction

Acaru

Abdullah

Lim

2023

Waste Biomass Valor

View full text Add to dashboard Cite

Almost half of the wood resulted from mass deforestation for infrastructure and agricultural developments is declared waste. To mitigate the impact and exploit renewable sources of energy sustainably it is paramount to explore their further utilizations. Hydrothermal liquefaction (HTL) technology holds the promise to convert biomass into biofuels. In this study, conversion of wood residue under continuous flow, subcritical HTL was investigated under two conditions; untreated and alkaline pretreated. Results show that 4% NaOH pretreatment increased the production of fermentation sugar, glucose, by 1.8-fold (equivalent to 90 g/L) and facilitated faster recovery times compared to raw wood. Also, at 0.2 MPa HTL, the alkaline pretreatment shifted the hydrolysis of arabinose and cellobiose to rhamnose and increased the fluid's acidity from pH of 6.1 to pH of 3.5. Under the pretreatment, the energy output from glucose reached 246 kJ and the average Net Energy Ratio for glucose during liquefaction reached values as high as 63%. These results will usher in new waste conversion methods into sustainable biofuels via continuous flow HTL, thereby supporting the green energy transition towards net zero.

show abstract

Incorporating hydrothermal liquefaction into wastewater treatment – Part I: Process optimization for energy recovery and evaluation of product distribution

Cited by 22 publications

References 125 publications

In-Depth Identification of the Sources and Features of Organic Fluorescent Structures in the Sewage Sludge Hydrothermal Aqueous Phase

In-Depth Identification of the Sources and Features of Organic Fluorescent Structures in the Sewage Sludge Hydrothermal Aqueous Phase

Sustainable hydrothermal carbon for advanced electrochemical energy storage

Sustainable Valorization of Wood Residue for the Production of Biofuel Materials Via Continuous Flow Hydrothermal Liquefaction

Contact Info

Product

Resources

About