Understanding the role of cellulose fiber on the dewaterability of simulated pulp and paper mill sludge

Zhang, Wenhui; Wu, Jian; Weng, Liangyu; Zhang, Hongjie; Zhang, Jian; Wu, Anbo

doi:10.1016/j.scitotenv.2019.134376

Cited by 20 publications

(1 citation statement)

References 31 publications

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“…In addition, poor rigidity was bad for sludge dewatering to maintain the water channels (Ning et al 2013;Wu et al 2017). Zhang et al (2020b) also found the optimum pulp fiber length in the paper sludge dewatering. Therefore, to avoid the fiber fibrillation and increase the fiber strength, a large amount of WPT can be crushed after setting the optimum fiber length in a disintegrator in practice.…”

Section: Table 1 Properties Of the Wpt Fibersmentioning

confidence: 93%

Enhancing paper sludge dewatering by waste polyester fiber and FeCl3 for preparation of Fe-rich biochar

Zhang

Tong

Zhou

et al. 2021

BioRes

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The paper sludge conditioning effects of waste polyester textile fibers as skeleton builders combined with ferric chloride (FeCl3) were evaluated and the sludge dewatering mechanism was explored. The catalytic effect of Fe-rich sludge biochar (Fe-SB) on enhancing sludge dewaterability was evaluated. Results showed the combined fiber-FeCl3 conditioning significantly promoted the sludge dewaterability compared with conditioner alone, leading to a 77.5% decrease in specific filtration resistance and a 68.9% increase in net yield. The decrease of extracellular polymeric substances (EPS) contents showed that the EPS were difficult to extract and sludge floc strength was enhanced as a result of chemical reactions such as complexation processes and charge neutralization. Hence, the enhancement of sludge dewaterability was primarily due to the sludge cake with a porous and incompressible structure formed by fiber and FeCl3, and the rigidity structure of fiber. Moreover, the Fe-SB prepared by fiber-FeCl3 conditioning sludge could effectively activate persulfate to enhance the sludge dewaterability, with water content of dewatered sludge decreasing by 14.6%. The Fe-SB had dual functions of the heterogeneous catalyst of persulfate and skeleton builder. This study presents a sludge recycling method that combined physicochemical conditioning and sludge biochar materials prepared by pyrolysis.

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Section: Table 1 Properties Of the Wpt Fibersmentioning

confidence: 93%