Hydrochar production from watermelon peel by hydrothermal carbonization

Chen, Xuejiao; Lin, Qimei; He, Ruidong; Zhao, Xingbo; Li, Guitong

doi:10.1016/j.biortech.2017.04.012

Cited by 155 publications

(55 citation statements)

References 45 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Pala et al [14] compared the HTC and torrefaction of grape pomace (GP) and found that in comparison to torrefaction, HTC results in products with higher energy density, energy yield, fragility, and combustion reactivity. Their results also indicated that the mass yield for HTC experiments was almost equal for 175 • C, 200 • C, and 225 • C. Watermelon peels and orange peels were hydrothermally carbonized in studies by Chen et al [15] and Fernandez et al [16], respectively. Likewise, the HTC of tomato peels was investigated by Sabio et al [17] who showed that while the time and the temperature of the process have significant effects on the mass yield and energy densification ratio, the water to biomass ratio has a minor effect.…”

Section: Introductionmentioning

confidence: 93%

Hydrothermal Carbonization of Fruit Wastes: A Promising Technique for Generating Hydrochar

et al. 2018

View full text Add to dashboard Cite

Hydrothermal carbonization (HTC) is a useful method to convert wet biomass to value-added products. Fruit waste generated in juice industries is a huge source of moist feedstock for such conversion to produce hydrochar. This paper deals with four types of fruit wastes as feedstocks for HTC; namely, rotten apple (RA), apple chip pomace (ACP), apple juice pomace (AJP), and grape pomace (GP). The operating conditions for HTC processing were 190 °C, 225 °C, and 260 °C for 15 min. For all samples, higher heating value and fixed carbon increased, while volatile matter and oxygen content decreased after HTC. Except for ACP, the ash content of all samples increased after 225 °C. For RA, AJP, and GP, the possible explanation for increased ash content above 225 °C is that the hydrochar increases in porosity after 230 °C. It was observed that an increase in HTC temperature resulted in an increase in the mass yield for RA and GP, which is in contrast with increasing HTC temperature for lignocellulose biomass. Other characterization tests like thermogravimetric analysis (TGA) and scanning electron microscopy (SEM) also showed that the HTC process can be successfully used to convert fruit wastes into valuable products.

show abstract

Section: Introductionmentioning

confidence: 93%

Hydrothermal Carbonization of Fruit Wastes: A Promising Technique for Generating Hydrochar

et al. 2018

View full text Add to dashboard Cite

show abstract

“…The measured electrical conductivity of PBM-ETPSH (6.99 dS m −1 ) was more than its precursor PBM-ETPS (5.36 dS m −1 ). The increased electrical conductivity was due to the adsorption of dissociated salts from the raw material during hydrothermal carbonization 16 . The lead content of the PBM-ETPS diminished after hydrothermal carbonization from 82 mg kg −1 to below detection limit in PBM-ETPSH which might be due to the leaching of lead from solid to liquid portions.…”

Section: Characterization Of Pbm-etps and Pbm-etpsh The Ph And Electmentioning

confidence: 99%

Preparation and Characterization of Optimized Hydrochar from Paper Board Mill Sludge

Oumabady

Sebastian

Banu

et al. 2020

Sci Rep

View full text Add to dashboard Cite

The amount of Paper Board Mill Effluent Treatment Plant Sludge (PBM-ETPS) dumped from paper mills are huge and its conversion into hydrochar for the purpose of energy has broad prospects. this study investigated the optimum conditions for the production of PBM-ETPS derived hydrochar (PBM-ETPSH) through Reponse Surface Methodology (RSM) for more surface area and pore volume with minimal hydrogen to carbon (H/C) and oxygen to carbon (O/C) ratios. The PBM-ETPSH had higher heating value (HHV) of 18.39 MJ kg −1 with fixed carbon percentage of 15.6. Our results showed a reduction in H/C (35.05%) and O/C (43.7%) ratios confirming the coalification of optimized PBM-ETPSH. Thermogravimetric investigations of blending PBM-ETPSH with coal in 1:1 ratio increased its HHV to 22.25 MJ kg −1 making it suitable as an energy alternative for paper mills.

show abstract

“…The carbonates, phosphates, and oxides in biochar can result in the precipitation of heavy metals, which enhances the relative fractions of heavy metals in the biochar-added soil [48]. The different functional groups, for instance, carboxyls, phenolics, and hydroxyls, on the surface of porous biochar can adsorb heavy metals through coordination and chelation, which explains the improvements in acid-soluble, oxidable heavy metals in the biochar-added soils [43,44,49,50]. The microbial decomposition of biochar may decrease oxidable heavy metals and valence alteration of some heavy metals, for example, Cu, Cr, Mn, and As [51].…”

Section: The Impacts Of Sewage Sludge Biochar Amendment On Soil Heavymentioning

confidence: 99%

The Sewage Sludge Biochar at Low Pyrolysis Temperature Had Better Improvement in Urban Soil and Turf Grass

et al. 2019

Self Cite

View full text Add to dashboard Cite

In recent years, continuous efforts have been made to understand the impact of biochar on arable soil fertility. Little is known about whether the biochar derived from municipal sewage sludge has positive impacts on urban soil. In this study, we pyrolyzed spray-dried municipal sewage sludge at 200 °C, 300 °C, 500 °C, and 700 °C for 2 h in a muffle furnace and then amended it into an urban soil to grow turf grass in pots. The outcomes demonstrated that biochar incorporation caused remarkable increases in soil organic C, black C, total N, available P, and K by 3–8, 7–25, 2–9, 10–19, and 1.4–2 times, respectively. The dry matter of turf grass increased by 43–147%, probably due to the nutritional improvement after biochar addition. The turf grass grown in biochar-added soil had 4–70% lower heavy metals than that in the control, although the soils had much higher total heavy metals, which might imply that biochar amendment reduced the bioavailability of heavy metals. Considering the cost of biochar production and its impacts on both urban soil and grass, it would be alternative to convert the spray-dried municipal sewage sludge into biochar at 200 °C for 2 h and then used as an urban soil amendment.

show abstract

Hydrochar production from watermelon peel by hydrothermal carbonization

Cited by 155 publications

References 45 publications

Hydrothermal Carbonization of Fruit Wastes: A Promising Technique for Generating Hydrochar

Hydrothermal Carbonization of Fruit Wastes: A Promising Technique for Generating Hydrochar

Preparation and Characterization of Optimized Hydrochar from Paper Board Mill Sludge

The Sewage Sludge Biochar at Low Pyrolysis Temperature Had Better Improvement in Urban Soil and Turf Grass

Contact Info

Product

Resources

About