Drying enhancement of sludge with resin-type drying accelerator and its mechanism

Kobayashi, Nobusuke; Okada, Kazuki; Tachibana, Yuma; Kamiya, Kenji; Zhang, Baiqiang; Suami, Akira; Nakagawa, Tsuguhiko; Itaya, Yoshinori

doi:10.1080/07373937.2020.1725770

Cited by 11 publications

(2 citation statements)

References 26 publications

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“…(2021) used resins as accelerators in the drying of urban sewage and observed that, regardless of the presence of resin, moisture directly in uenced the contact angle [20].…”

Section: Adhesion Forces In Brewer's Spent Grainmentioning

confidence: 99%

Effects of Adherence in the Drying of Brewer’s Spent Grain with Rotating Equipment

Pinto,

Freire,

Freire

et al. 2023

Waste Biomass Valor

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Brewer's spent grain (BSG) is a biomass with a high lignocellulosic content that can be reused in thermal processes, however it has high moisture content, which avoids it from being used in these processes. Pretreatment by drying rotating equipment turns out to be a suitable alternative. This work studied the rotational drying of BSG analyzing the effects of adhesion of solids. To do this, a standard pan combined with an external blower was chosen as a rotary dryer due to the easy access to the bed and the inner surface of the dryer. In addition, this type of dryer made possible to determine the relationship between BSG moisture and adhesion force. Under the operating conditions of the experiments, the moisture content of BSG decreased from 80 to 8.6% (wb), making it possible for the biomass to be utilized in thermal processes. Moisture ratios higher than 0.6 led to greater adherence and consequent agglomeration of solids, reducing their mobility and heat transfer with the internal surface of the dryer. At the start of drying, the bed's rotational speed rate of BSG was approximately 14 rpm, half of the maximum rate of 28 rpm, also the temperatures of the BSG and the inner wall of the tray were in equilibrium, showing that changes in biomass adhesion would take non-uniform drying. Novelty StatementUnderstanding of the drying of spent grain with focus on adhesion and cohesion mechanisms allows adequate strategies to reduce negative effects of agglomeration, allowing the reuse of this biomass.

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“…(2021) used resins as accelerators in the drying of urban sewage and observed that, regardless of the presence of resin, moisture directly in uenced the contact angle [20].…”

Section: Adhesion Forces In Brewer's Spent Grainmentioning

confidence: 99%

Effects of Adherence in the Drying of Brewer’s Spent Grain with Rotating Equipment

Pinto,

Freire,

Freire

et al. 2023

Waste Biomass Valor

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“…At present, sludge pretreatment technology is primarily classified into physical, chemical, and biological method based on their respective mechanisms. Physical methods involve mechanical pretreatment, 10 thermal hydrolysis, 11 ultrasonic pretreatment, 12 and so forth. Chemical methods include acidolysis, oxidation treatment, 13 and alkaline treatment 14 .…”

Section: Introductionmentioning

confidence: 99%

Study on the effect of alkali on the production of volatile fatty acids from rhamnolipid‐alkali‐thermal pretreated waste activated sludge

Chuanchuan,

Yuling,

Shuaishuai

et al. 2024

Env Prog and Sustain Energy

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This article systematically explores the strengthening effect of NaOH dosage on the fermentation acid production of Waste Activated Sludge (WAS) by the rhamnolipids‐alkali‐thermal combined pretreatment. Analyzed the dissolution characteristics of organic matter in sludge, changes in total volatile fatty acids (VFAs) content and components, and microbial community structure. Research has shown that increasing the amount of NaOH can promote the dissolution of sludge extracellular polymeric substances (EPS) and cell lysis. When NaOH dose was 60 mg/g VS, the dissolution of SCOD was the largest, reaching 5427.78 mg/L. It provides high‐quality substrate for anaerobic flora through the decomposition of refractory humus‐like substances and macromolecular substances, thus improving the production of VFAs. When NaOH dose was 80 mg/g VS, the maximum VFAs yield was 1663.76 mg C/L, and the fermentation type was butyric acid. The increase of NaOH dose promotes the effective enrichment of bacteria, and the dominant bacteria are Proteobacteria, Firmicutes, and Bacteroides at the gate level, with different abundance. The fermentation time plays a decisive role in the evolution of microbial population, and the increase of NaOH dose promotes the enrichment of acid‐producing bacteria, thus improving the production of VFAs.

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Mechanism of metabolic uncoupler promoted water removal and increased calorific value of sludge during biodrying process

Yang,

Xiang,

Wang

et al. 2025

Fuel

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Drying enhancement of sludge with resin-type drying accelerator and its mechanism

Cited by 11 publications

References 26 publications

Effects of Adherence in the Drying of Brewer’s Spent Grain with Rotating Equipment

Effects of Adherence in the Drying of Brewer’s Spent Grain with Rotating Equipment

Study on the effect of alkali on the production of volatile fatty acids from rhamnolipid‐alkali‐thermal pretreated waste activated sludge

Mechanism of metabolic uncoupler promoted water removal and increased calorific value of sludge during biodrying process

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