Sustainable waste mitigation: biotemplated nanostructured ZnO for photocatalytic water treatment via extraction of biofuels from hydrothermal carbonization of banana stalk

RSC Advances ◽  
2016 ◽  
Vol 6 (95) ◽  
pp. 92813-92823 ◽  
Author(s):  
Ayush Upneja ◽  
Guolan Dou ◽  
Chitanya Gopu ◽  
Carol A. Johnson ◽  
Anna Newman ◽  
...  
Keyword(s):  
Water Treatment ◽  
Intrinsic Value ◽  
Agricultural Waste ◽  
Hydrothermal Carbonization ◽  
Food Energy

Working at the food-energy-water nexus, we identified an abundant agricultural waste with little intrinsic value – banana stalk – that can be converted to biofuels and a template for water treatment materials via hydrothermal carbonization.

scholarly journals Synthesis and characterization of rice husk biochar via hydrothermal carbonization for wastewater treatment and biofuel production

2020 ◽  
Vol 10 (1) ◽  
Author(s):  
Nazia Hossain ◽  
Sabzoi Nizamuddin ◽  
Gregory Griffin ◽  
Periasamy Selvakannan ◽  
Nabisab Mujawar Mubarak ◽  
...  
Keyword(s):  
Rice Husk ◽  
Agricultural Waste ◽  
Value Added ◽  
Hydrothermal Carbonization ◽  
Catalytic Performance ◽  
Biofuel Production ◽  
Suspension Stability ◽  
Waste Biomass ◽  
Suitable Material ◽  
Rice Husk Biochar

Abstract The recent implication of circular economy in Australia spurred the demand for waste material utilization for value-added product generations on a commercial scale. Therefore, this experimental study emphasized on agricultural waste biomass, rice husk (RH) as potential feedstock to produce valuable products. Rice husk biochar (RB) was obtained at temperature: 180 °C, pressure: 70 bar, reaction time: 20 min with water via hydrothermal carbonization (HTC), and the obtained biochar yield was 57.9%. Enhancement of zeta potential value from − 30.1 to − 10.6 mV in RB presented the higher suspension stability, and improvement of surface area and porosity in RB demonstrated the wastewater adsorption capacity. Along with that, an increase of crystallinity in RB, 60.5%, also indicates the enhancement of the catalytic performance of the material significantly more favorable to improve the adsorption efficiency of transitional compounds. In contrast, an increase of the atomic O/C ratio in RB, 0.51 delineated high breakdown of the cellulosic component, which is favorable for biofuel purpose. 13.98% SiO2 reduction in RB confirmed ash content minimization and better quality of fuel properties. Therefore, the rice husk biochar through HTC can be considered a suitable material for further application to treat wastewater and generate bioenergy.

scholarly journals The impact of hydrothermal carbonization on the surface functionalities of wet waste materials for water treatment applications

2020 ◽  
Vol 27 (19) ◽  
pp. 24369-24379 ◽  
Author(s):  
Mirva Niinipuu ◽  
Kenneth G. Latham ◽  
Jean-François Boily ◽  
Magnus Bergknut ◽  
Stina Jansson
Keyword(s):  
Water Treatment ◽  
Hydrothermal Carbonization ◽  
Waste Materials ◽  
The Impact

scholarly journals Simultaneous removal of rotavirus and adenovirus from artificial ground water using hydrochar derived from swine feces

2016 ◽  
Vol 14 (5) ◽  
pp. 754-767 ◽  
Author(s):  
J. W. Chung ◽  
M. Breulmann ◽  
A. Clemens ◽  
C. Fühner ◽  
J. W. Foppen ◽  
...  
Keyword(s):  
Water Treatment ◽  
Human Adenovirus ◽  
Complete Removal ◽  
Hydrothermal Carbonization ◽  
Simultaneous Removal ◽  
Sand Column ◽  
Virus Removal ◽  
Swine Feces ◽  
Set Up ◽  
Fecal Waste

Hydrothermal carbonization technology can convert fecal waste into a valuable carbonaceous product referred to as hydrochar. We investigated the potential of fecal waste-derived hydrochar as an adsorbent for virus removal in water treatment. Swine feces was hydrothermally treated under two conditions: at 180 °C for 2 h and 230 °C for 7 h. The resulting solid products (hydrochar) were evaluated as virus adsorbents in water treatment. Simultaneous removal of pathogenic rotavirus (RV) and human adenovirus (HAdV) was investigated using a sand column set-up of 10 cm bed height with and without hydrochar supplement (1.5%, w/w). The removal efficiency of both viruses in a hydrochar-amended column was >3 log (complete removal). The amount of virus released in deionized water when flushed into the virus-retaining columns indicated that the secondary energy minimum played a more important role in RV retention than that of HAdV. Zeta-potential and hydrophobicity measurements on hydrochar materials indicated that the improved virus removal performance of hydrochar-amended columns was induced by the provision of extra hydrophobic surfaces. This study provides evidence that fecal waste-derived hydrochar can be used as a competent virus adsorbent.

scholarly journals Study on the removal of cresol for the agricultural waste water treatment.

1987 ◽  
Vol 36 (1) ◽  
pp. 7-12
Author(s):  
Takeo NAKAMURA ◽  
Tamotsu MIYOSHI ◽  
Seiki TANADA ◽  
Tatsumi TOUMIYA
Keyword(s):  
Waste Water ◽  
Water Treatment ◽  
Agricultural Waste ◽  
Waste Water Treatment

Advantages of Using Non-isothermal Bioreactors in Agricultural Waste Water Treatment by Means of Immobilized Urease. Study on the Influence of Spacer Length and Immobilization Method

2002 ◽  
Vol 50 (10) ◽  
pp. 2802-2811 ◽  
Author(s):  
Hazem El Sherif ◽  
Silvana Di Martino ◽  
Paola Travascio ◽  
Anna De Maio ◽  
Marianna Portaccio ◽  
...  
Keyword(s):  
Waste Water ◽  
Water Treatment ◽  
Agricultural Waste ◽  
Waste Water Treatment ◽  
Spacer Length ◽  
Immobilization Method

scholarly journals Low Temperature One-Pot Hydrothermal Carbonization of Corn Straw into Hydrochar for Adsorbing Cadmium (II) in Wastewater

Energies ◽  
2021 ◽  
Vol 14 (24) ◽  
pp. 8503
Author(s):  
Heng Li ◽  
Yan Shi ◽  
Li Bai ◽  
Mingshu Chi ◽  
Xiuling Xu ◽  
...  
Keyword(s):  
Specific Surface ◽  
Surface Area ◽  
Specific Surface Area ◽  
Hydrothermal Reaction ◽  
Agricultural Waste ◽  
Hydrothermal Carbonization ◽  
Size Analysis ◽  
Order Kinetic ◽  
Corn Straw ◽  
Pore Size Analysis

Corn straw, a typical agricultural waste, was directly converted into hydrochar with a yield of 77.56% by hydrothermal carbonization at 140–230 °C for 2 h with a solid–liquid ratio of 1:20. The morphology and surface properties were characterized by elemental analysis, specific surface area and pore size analysis and Fourier transform infrared spectroscopy. The results showed that with the increase of hydrothermal reaction temperature, some physical and chemical properties such as the increase of hydrocarbon content, crystallinity, and specific surface area of hydrochar changed significantly. A series of chemical reactions such as dehydration, decarboxylation, and aromatization occurred in the hydrothermal carbonization process so that the prepared hydrochar had rich oxygen-containing functional groups (-HO, C-O-C, C=O) and unique porous structure made the hydrochar prepared at 170 °C had the best removal effect on Cd2+ in solution (5.84 mg/g). These specific conditions could remove Cd2+ and greatly improve the adsorption performance. The pseudo-second-order kinetic model and Freundlich isotherm model could better describe the adsorption behavior of Cd2+. Therefore, corn straw hydrochar as a potential adsorbent for removing Cd2+ from water.

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