A comparative experimental study of the anaerobic treatment of food wastes using an anaerobic digester with a polyamide stirring rake or a stainless-steel stirring rake

Liu, Gang; Li, Yaning; Wang, Jianan; Sheng, Hwai-Ping; Li, Qiang; Zeng, Yang; Song, Ruopu

doi:10.1016/j.jenvman.2018.04.084

Cited by 6 publications

(2 citation statements)

References 31 publications

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“…Specifically, if the stirring intensity is too high, it will cause reactor acidification because the agitating vane can destroy the microbial structure [94]. Meanwhile, it has been reported that intense stirring in the reactor inhibits propionate degradation and thus leads to propionate accumulation [95]. According to the past literature, the accumulation of propionate brings about an imbalance between acid production and acid consumption, which inhibits the growth and reproduction of MPA [96].…”

Section: Stirring Methodsmentioning

confidence: 99%

A Review on Start-Up Phase Optimization of Kitchen Waste Anaerobic Digestion

Yan

et al. 2023

Fermentation

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Kitchen waste has been confirmed as an appropriate substrate for anaerobic digestion, although means of alleviating the difficulties and time-consuming nature of the start-up phase need to be further explored. Based on the mechanism of anaerobic digestion, we discuss the factors influencing the anaerobic start-up phase of kitchen waste. By controlling the temperature, pH, organic loading rate, inoculation ratio and other parameters, the high activity of methane-producing archaea and other bacteria can be intensified, thereby increasing the biogas yield. Furthermore, we introduce the methods of substrate pretreatment, operating condition optimization and conductive material addition. Finally, we put forward future perspectives and research gaps related to accelerating the start-up phase of anaerobic bioreactors utilized for kitchen waste biodegradation.

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Section: Stirring Methodsmentioning

confidence: 99%

A Review on Start-Up Phase Optimization of Kitchen Waste Anaerobic Digestion

Yan

et al. 2023

Fermentation

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“…Mixing and stirring technology are intensely studied subjects due to their importance in process engineering [12]. After the development of stirring technology from an empirical art to science [13], recent publications span across many disciplines, such as waste management [14], materials science [15] and renewable energy technology [16].…”

Section: Literature Reviewmentioning

confidence: 99%

Refractive index matching (RIM) of liquid and semi-solid materials to acrylic glass for optically measuring the mechanics in soft granular matter

2020

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The main context of this research is the fluid mechanical analysis of stirred chunky fruit preparations, which are typically highly loaded suspensions (ca. 50%w/w) with particles susceptible to mechanical damage. Knowledge about the transport of such particles in fluid matrices is important in natural and technical processes and can be obtained using optical measurement techniques, e.g. Particle Image Velocimetry. Matching the refractive indices of the relevant material components, a way to ensure signal reliability, is difficult for highly concentrated dispersed systems. Material properties such as plasticity and elasticity of the solid phase and the rheological behaviour of the fluid must be met simultaneously. Fluid motion across the full range of the stirred volume and the immediate surroundings of the stirrer could not be observed without successful refractive index matching of acrylic glass, stirred liquid, and suspended particles. Using the presented materials, the mechanical firmness (but not the resistance against breaking) of soft granular matter can be mimicked. The movement of gel particles in suspensions, their resulting deformation and ultimately, the inflicted damage can be observed with optical methods. The rigidity of the gels may be varied to some extent with the concentrations of the respective hydrocolloids, which, at low concentrations, have no apparent effect on the refractive index. Introducing ethanol, thickeners or other components may yield more degrees of freedom in modelling their flow behaviour.

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