Degradation of slime extracellular polymeric substances and inhibited sludge flocs destruction contribute to sludge dewaterability enhancement during fungal treatment of sludge using filamentous fungus Mucor sp. GY-1

Wang, Zhenyu; Zheng, Guanyu; Zhou, Lixiang

doi:10.1016/j.biortech.2015.06.019

Cited by 26 publications

(9 citation statements)

References 30 publications

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“…Meanwhile, it should be noted that inoculation with excessive fungi (e.g., inoculum volume fraction of 20%) negatively affected the sludge dewaterability, which resulted in CST and SRF values that were higher than those of the control (without inoculation) over the whole incubation period. This observation is consistent with earlier studies (Molla and Fakhru'l-Razi, 2012; Wang et al, 2015). Some researchers have attributed this deterioration in sludge dewaterability with a high inoculation dose to excessive growth of lamentous fungi.…”

Section: Resultssupporting

confidence: 92%

“…Scanning electron microscopy (S-3400N II, Hitachi Co., Japan) was used to visualize the morphology of the fungaltreated sludge. Slime EPS was obtained according to the extraction procedure described by Wang et al (2015). The sludge was centrifuged at 2500 ×g for 15 min and ltered through 0.45μm membrane.…”

Section: Methodsmentioning

confidence: 99%

“…An inoculum of the isolate strain NJ12 was prepared in the form of mycelial biomass according to the procedures described by Wang et al (2015). First, Czapek-Dox medium was inoculated with fungal cells (~ 3×10 6 spores/mL) for cultivation of mycelial biomass.…”

Section: Preparation Of the Fungal Inoculummentioning

confidence: 99%

“…In particular, for the treatment with 5% inoculum, the slime EPS content was cut in half at day 3. Slime EPS are located in the outermost layer of the sludge and weakly bound to the cell surface (Sheng et al, 2010;Wang et al, 2015).…”

Section: Changes In Sludge Ph Surface Charge and Oc Size During Fungal Treatmentmentioning

confidence: 99%

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Enhancement of sewage sludge dewaterability by fungal conditioning with Penicillium simplicissimum NJ12: from bench- to pilot-scale consecutive multi-batch investigations

Tao

Zhang

et al. 2021

Environ Sci Pollut Res

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Bench-and pilot-scale successive multi-batch trials were conducted to investigate the performance and sustainability of fungal conditioning with Penicillium simplicissimum NJ12 for improving sludge dewatering. The dominant factors affecting the sludge dewaterability improvement by P. simplicissimum NJ12 were also identi ed. Fungal treatment with P. simplicissimum NJ12 at a volume fraction of 5% of the inoculum greatly improved the sludge dewaterability. This improvement was characterized by sharp decreases in the speci c resistance to ltration from 1.97 × 10 13 to 3.52 × 10 11 m/kg and capillary suction time from 32 to 12 s within 3 days. Stepwise multiple linear regression analysis showed that a marked decrease (58.8%) in the protein content in slime extracellular polymeric substances and an increase in the zeta potential of the sludge (from − 35 to − 10 mV) were the most important factors that improved the dewaterability of sludge after fungal treatment. Consecutive processes of fungal treatment could be realized by recirculating the fungal-treated sludge with a recycling rate of 1:2 (V biotreated sludge /V total sludge ). The treatment effectiveness was maintained only over three successive cycles, but replenishment with fresh P. simplicissimum NJ12 would be provided periodically at set batch intervals. These ndings demonstrate the possibility of P. simplicissimum NJ12-assisted fungal treatment for enhancing sludge dewatering.

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Section: Resultssupporting

confidence: 92%

Section: Methodsmentioning

confidence: 99%

Section: Preparation Of the Fungal Inoculummentioning

confidence: 99%

Section: Changes In Sludge Ph Surface Charge and Oc Size During Fungal Treatmentmentioning

confidence: 99%

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Enhancement of sewage sludge dewaterability by fungal conditioning with Penicillium simplicissimum NJ12: from bench- to pilot-scale consecutive multi-batch investigations

Tao

Zhang

et al. 2021

Environ Sci Pollut Res

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“…The hyphae can immobilize sludge particles, resulting in the formation of pellets, which leads to microbial aggregation as natural flocculants [ 20 , 21 ]. Notably, filamentous fungi can also improve the dewaterability and filterability of sludge by modifying its porosity structure [ 22 ]. Many studies have shown that compounds that are highly toxic toward bacteria may be harmless to fungi, such as antibiotics [ 21 ].…”

Section: Introductionmentioning

confidence: 99%

Biodegradation of Tetrahydrofuran by the Newly Isolated Filamentous Fungus Pseudallescheria boydii ZM01

Ren

Wang

et al. 2020

Microorganisms

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Tetrahydrofuran (THF) is widely used as a precursor for polymer syntheses and a versatile solvent in industries. THF is an environmental hazard and carcinogenic to humans. In the present study, a new THF-degrading filamentous fungus, Pseudallescheria boydii ZM01, was isolated and characterized. Strain ZM01 can tolerate a maximum THF concentration of 260 mM and can completely degrade 5 mM THF in 48 h, with a maximum THF degradation rate of 133.40 mg THF h−1 g−1 dry weight. Growth inhibition was not observed when the initial THF concentration was below 150 mM, and the maximum THF degradation rate was still maintained at 118.21 mg THF h−1 g−1 dry weight at 50 mM THF, indicating the great potential of this strain to degrade THF at high concentrations. The initial key metabolic intermediate 2-hydroxytetrahydrofuran was detected and identified by gas chromatography (GC) analyses for the first time during the THF degradation process. Analyses of the effects of initial pH, incubation temperature, and heavy metal ions on THF degradation revealed that strain ZM01 can degrade THF under a relatively wide range of conditions and has good degradation ability under low pH and Cu2+ stress, suggesting its adaptability and applicability for industrial wastewater treatment.

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Fungal Polysaccharides as Biosurfactants and Bioemulsifiers

Luft

2022

Fungal Biopolymers and Biocomposites

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Degradation of slime extracellular polymeric substances and inhibited sludge flocs destruction contribute to sludge dewaterability enhancement during fungal treatment of sludge using filamentous fungus Mucor sp. GY-1

Cited by 26 publications

References 30 publications

Enhancement of sewage sludge dewaterability by fungal conditioning with Penicillium simplicissimum NJ12: from bench- to pilot-scale consecutive multi-batch investigations

Enhancement of sewage sludge dewaterability by fungal conditioning with Penicillium simplicissimum NJ12: from bench- to pilot-scale consecutive multi-batch investigations

Biodegradation of Tetrahydrofuran by the Newly Isolated Filamentous Fungus Pseudallescheria boydii ZM01

Fungal Polysaccharides as Biosurfactants and Bioemulsifiers

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