Understand the antibacterial behavior and mechanism of hydrothermal wastewater

Xu, Yongdong; Wang, Yueyao; Lu, Jianwen; Yuan, Changbin; Zhang, Leli; Liu, Zhidan

doi:10.1016/j.watres.2022.119318

Cited by 10 publications

(2 citation statements)

References 46 publications

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“…The composition of the feedstock elements and compounds, as well as the order of product separation, play a crucial role in HTL 52 . Some small molecular compounds are considered as being light biocrude oil and can be extracted using organic solvents such as petroleum ether, dichloromethane, acetone, and ethyl acetate 53 , 54 .…”

Section: Resultsmentioning

confidence: 99%

Van Krevelen diagrams based on machine learning visualize feedstock-product relationships in thermal conversion processes

Wang,

Shi

et al. 2023

Commun Chem

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Feedstock properties play a crucial role in thermal conversion processes, where understanding the influence of these properties on treatment performance is essential for optimizing both feedstock selection and the overall process. In this study, a series of van Krevelen diagrams were generated to illustrate the impact of H/C and O/C ratios of feedstock on the products obtained from six commonly used thermal conversion techniques: torrefaction, hydrothermal carbonization, hydrothermal liquefaction, hydrothermal gasification, pyrolysis, and gasification. Machine learning methods were employed, utilizing data, methods, and results from corresponding studies in this field. Furthermore, the reliability of the constructed van Krevelen diagrams was analyzed to assess their dependability. The van Krevelen diagrams developed in this work systematically provide visual representations of the relationships between feedstock and products in thermal conversion processes, thereby aiding in optimizing the selection of feedstock and the choice of thermal conversion technique.

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Section: Resultsmentioning

confidence: 99%

Van Krevelen diagrams based on machine learning visualize feedstock-product relationships in thermal conversion processes

Wang,

Shi

et al. 2023

Commun Chem

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“…The study demonstrated a sustainable process to produce biocrude oil through the HTL process as there was a high removal efficiency for nitrogen, COD, and phosphate [12]. Xu et al [13] introduced five Gram-positive strains and five Gramnegative strains of bacteria to mimic a typical pathogenic microorganism in four different HTL feedstocks and discovered that all samples exhibited antibacterial characteristics and mechanisms. The results from this study support previous experimental results that Grampositive indicators are more sensitive than Gram-negative one to HTL-AP toxicity, which promotes Nitrosomonas and Nitrobacter as prime candidates for treating HTL-AP as they are Gram-negative bacteria.…”

Section: Introductionmentioning

confidence: 99%

Wastewater Nutrient Recovery via Fungal and Nitrifying Bacteria Treatment

Lopez,

Leme,

Warzecha

et al. 2024

Agriculture

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In efforts to reduce the consumption of fossil fuels and promote recycling biowaste, there is an interest in the production of post-hydrothermal liquefaction wastewater (HTL-AP) from the hydrothermal liquefaction (HTL) process that converts wet biomass into biocrude oil. This study explores ways of transforming potentially toxic HTL-AP into a fertilizer source for hydroponic cropping systems. This study specifically investigates the integration of the white-rot fungus Trametes versicolor with nitrifying bacteria (Nitrosomonas and Nitrobacter) to convert the organic nitrogen compounds into inorganic nitrogen while also producing the enzyme laccase, which has been shown to remove toxic compounds. This study aims to increase the concentration of nitrate-N to valorize wastewater as a suitable fertilizer by measuring several parameters, including laccase activity, pH, nitrate-N, and ammonia/ammonium-N concentrations, and analyzes interactions to optimize the conversion process. The data support the claim that the simultaneous inoculation of T. versicolor and nitrifying bacteria significantly increases nitrate-N concentrations in HTL-AP, as it increased by 17 times, or an increase of 32.69 mg/L. In addition, HTL-AP treated with T. versicolor and nitrifying bacteria reduced the treatment time by 120 h, highlighting a reduction in personnel time and energy consumption. Therefore, this research accentuates sustainability through fungal and bacterial treatments to develop eco-friendly hydroponic fertilizers. Future research should explore the potential of utilizing the combination of T. versicolor and nitrifying bacteria for the treatment of other industrial wastewaters.

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