Water evaporation induced in-situ interfacial compatibilization for all-natural and high-strength straw-fiber/starch composites

Zhang, Yingpei; Wang, Jin; Xia, Kang-Wei; Zhao, Yong; Yuan, Qing-Wen; Huang, Zhao‐Xia; Yang, Feng; Qu, Jinping

doi:10.1016/j.carbpol.2022.120535

Cited by 7 publications

(3 citation statements)

References 33 publications

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“…The volume was kept on increasing until no significant differences in the drying time was observed. Similarly, the rotational speed of the agitator mounted inside the digestion chamber was varied from 10 to 60 RPM to check the influence of low, medium and high levels of agitation on digestion time (Fransén and Blomstergren, 2016; Zhang et al, 2023). To achieve higher drying rate, a constant airflow velocity (4 m s −1 ) was maintained throughout the experiment.…”

Section: Methodsmentioning

confidence: 99%

“…10, 20, 30, 40, 50 and 60 RPM). These levels were decided by considering very low (10 RPM), low (20 RPM), medium-lower (30 RPM), medium-higher (40 RPM), high (50 RPM) and very high (60 RPM) rotational speed particularly used in agitation-assisted thermal composting processes (Fransén and Blomstergren, 2016; Zhang et al, 2023).…”

Section: Methodsmentioning

confidence: 99%

“…Hence, the value of energy consumption is decreased with the increase in rotational speed of agitator from 20 to 40 RPM. This might be because Zhang et al (2023) also observed that increase in rotational speed from 20 to 40 RPM led to increase in moisture evaporation rate during drying of corn starch and wheat straw mixture. However, rotational speed beyond 40 RPM leads to formation of condensed masses, leading to increment in the digestion duration and the energy consumption.…”

Section: Effect Of Process Variables On the Energy Consumptionmentioning

confidence: 98%

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Optimisation of process parameters of a thermal digester for the rapid conversion of food waste into value-added soil conditioner

Kumar

Gupta

Yadav³

2023

Waste Manag Res

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A novel thermal digester for converting food waste (FW) into nutrient-rich soil conditioner was designed and explored. The process variables, that is, temperature, the volume of the digestion chamber and the rotational speed of the digester were optimised using response surface methodology (RSM). The study revealed that the digester temperature of 150°C and rotational speed of 40 RPM required minimum time (180 minutes) for attaining the equilibrium moisture with a minimum energy consumption of 0.218 kWh kg−1. The process resulted in 80 ± 2.5% reduction in total volume of the FW. Detailed characterisation revealed that the end product was comparable to the organic fertiliser as per the Fertiliser Association of India norms. The digestion helps in breakdown of cellulose content of FW into hemicellulose which supports formation of primary and secondary walls, seed storage carbohydrates, and facilitates plant growth. 1H-Nuclear magnetic resonance (1H-NMR) spectra of the end product revealed mineralisation of organics during digestion. Decrease in ultraviolet (UV) absorbance value at 280 nm also revealed the humification of the end product. X-ray diffraction (XRD) analysis disclosed extremely low crystallinity and non-recalcitrant nature of the end product. A low humification index value (HI-3.43), high fertilising index (FI-4.8), and clean index (CI-5.0) revealed that the end product could safely be utilised as an organic fertiliser. The cost–benefit analysis revealed that thermal digestion technique is profitable and economically viable with benefit–cost ratio (BCR) of 1.35. The study offers a unique approach for the rapid and hassle-free production of value-added soil conditioner from FW.

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Section: Methodsmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

Section: Effect Of Process Variables On the Energy Consumptionmentioning

confidence: 98%

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