Revealing how the entering nano-titanium dioxide in wastewater worsened sludge dewaterability

Yuan, Longhu; Li, Yifu; Zeng, Tianjing; Wang, Dongbo; Liu, Xuran; Xu, Qiuxiang; Yang, Qi; Yang, Fan; Hong, Chen

doi:10.1016/j.cej.2021.128465

Cited by 37 publications

(4 citation statements)

References 57 publications

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“…In this paper, the sludge collected from the WWTPs was chosen as the substrate due to high BPA content and H 2 S production potential. , The concentration of BPA contained in this collected sludge (Changsha, China) was 37.5 mg/kg TSS (total suspended solid), which was similar to previously reported environmental concentrations of BPA (i.e., 0.49–154.8 mg/kg) . Before use, the collected sludge was recultured to remove the accumulated BPA through running a sequencing batch reactor (50 L), which was fed with synthetic wastewater without BPA presence, with the specific operations being described in prior studies . The sequencing batch reactor operated in an anaerobic–anoxic–aerobic process, which mimicked the treatment process employed in WWTPs.…”

Section: Methodssupporting

confidence: 62%

“…6 Before use, the collected sludge was recultured to remove the accumulated BPA through running a sequencing batch reactor (50 L), which was fed with synthetic wastewater without BPA presence, with the specific operations being described in prior studies. 20 The sequencing batch reactor operated in an anaerobic−anoxic−aerobic process, which mimicked the treatment process employed in WWTPs. The original BPA in the collected sludge may be removed by aerobic degradation or elution.…”

Section: Experiments Preparationmentioning

confidence: 99%

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The Impact of Bisphenol A on the Anaerobic Sulfur Transformation: Promoting Sulfur Flow and Toxic H₂S Production

Fu,

Li,

Liu

et al. 2024

Environ. Sci. Technol.

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Bisphenol A (BPA), as a typical leachable additive from microplastics and one of the most productive bulk chemicals, is widely distributed in sediments, sewers, and wastewater treatment plants, where active sulfur cycling takes place. However, the effect of BPA on sulfur transformation, particularly toxic H 2 S production, has been previously overlooked. This work found that BPA at environmentally relevant levels (i.e., 50−200 mg/kg total suspended solids, TSS) promoted the release of soluble sulfur compounds and increased H 2 S gas production by 14.3− 31.9%. The tryptophan-like proteins of microbe extracellular polymeric substances (EPSs) can spontaneously adsorb BPA, which is an enthalpydriven reaction (ΔH = −513.5 kJ mol −1 , ΔS = −1.60 kJ mol −1 K −1 , and ΔG = −19.52 kJ mol −1 at 35 °C). This binding changed the composition and structure of EPSs, which improved the direct electron transfer capacity of EPSs, thereby promoting the bioprocesses of organic sulfur hydrolysis and sulfate reduction. In addition, BPA presence enriched the functional microbes (e.g., Desulfovibrio and Desulfuromonas) responsible for organic sulfur mineralization and inorganic sulfate reduction and increased the abundance of related genes involved in ATP-binding cassette transporters and sulfur metabolism (e.g., Sat and AspB), which promoted anaerobic sulfur transformation. This work deepens our understanding of the interaction between BPA and sulfur transformation occurring in anaerobic environments.

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Section: Methodssupporting

confidence: 62%

Section: Experiments Preparationmentioning

confidence: 99%

The Impact of Bisphenol A on the Anaerobic Sulfur Transformation: Promoting Sulfur Flow and Toxic H₂S Production

Fu,

Li,

Liu

et al. 2024

Environ. Sci. Technol.

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“…46 When present in TB-EPS, they can effectively lock water through hydrogen bonds. 47,48 3.3. Changes in sludge characteristics 3.3.1.…”

Section: Variation In Sludge Dewatering Performancementioning

confidence: 99%

Achievement of waste sludge deep dehydration under acidic conditions with polydimethyldiallylammonium chloride and ferric chloride: performance and mechanism

Lv,

Wang,

Liu

et al. 2024

RSC Adv.

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“…EPS can be stratified into three fractions including slime EPS (S-EPS), loosely bound EPS (LB-EPS) and tightly bound EPS (TB-EPS) [5]. A high correlation between EPS and dewaterability has been widely reported [6,7]. On the other hand, there were abundant negative surface charges of colloid Sustainability 2021, 13, 9700 2 of 17 particles in WAS, which enhanced the stability of colloidal particles and further deteriorated dewaterability [8].…”

Section: Introductionmentioning

confidence: 99%

Enhancing Phosphorus Recovery and Dewaterability of Waste Activated Sludge for Combined Effect of Thermally Activated Peroxydisulfate and Struvite Precipitation

Liao

Chen

et al. 2021

Sustainability

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Phosphorus is a nonrenewable and irreplaceable limited resource, and over 90% of phosphorus in influenttransfers into sludge in wastewater treatment plants. In this study, thermally activated peroxydisulfate (TAP) treatment was combined with struvite precipitation to enhance waste activated sludge (WAS) dewaterability and phosphorus recovery. TAP simultaneously enhanced dewaterability and solubilization of WAS. The optimal conditions of TAP treatment were PDS dosage 2.0 mmol/g TSS, 80 °C, pH 4.0~7.0 and 40 min, which enhanced dewaterability (capillary suction time (CST) from 94.2 s to 28.5 s) and solubilization (PO43−-P 177.71 mg/L, NH4+-N 287.22 mg/L and SCOD 10754 mg/L). Radical oxidation disintegrated tightly bound extracellular polymeric substances (TB-EPS) and further released bound water. The acidification effect neutralized the negative surface charge of colloid particles. Compared with thermal hydrolysis, TAP effectively promoted the release of PO43−, NH4+ and SCOD. Cation exchange removed most Ca and Al of the TAP treated supernatant. The optimal conditions of struvite precipitation were Mg/P 1.4 and pH 10.0, which achieved phosphorus recovery of 95.06% and struvite purity of 94.94%. The income obtained by struvite adequately covers the cost of struvite precipitation and the cost of WAS treatment is acceptable.

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Revealing how the entering nano-titanium dioxide in wastewater worsened sludge dewaterability

Cited by 37 publications

References 57 publications

The Impact of Bisphenol A on the Anaerobic Sulfur Transformation: Promoting Sulfur Flow and Toxic H₂S Production

The Impact of Bisphenol A on the Anaerobic Sulfur Transformation: Promoting Sulfur Flow and Toxic H₂S Production

Achievement of waste sludge deep dehydration under acidic conditions with polydimethyldiallylammonium chloride and ferric chloride: performance and mechanism

Enhancing Phosphorus Recovery and Dewaterability of Waste Activated Sludge for Combined Effect of Thermally Activated Peroxydisulfate and Struvite Precipitation

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Revealing how the entering nano-titanium dioxide in wastewater worsened sludge dewaterability

Cited by 37 publications

References 57 publications

The Impact of Bisphenol A on the Anaerobic Sulfur Transformation: Promoting Sulfur Flow and Toxic H2S Production

The Impact of Bisphenol A on the Anaerobic Sulfur Transformation: Promoting Sulfur Flow and Toxic H2S Production

Achievement of waste sludge deep dehydration under acidic conditions with polydimethyldiallylammonium chloride and ferric chloride: performance and mechanism

Enhancing Phosphorus Recovery and Dewaterability of Waste Activated Sludge for Combined Effect of Thermally Activated Peroxydisulfate and Struvite Precipitation

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Product

Resources

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The Impact of Bisphenol A on the Anaerobic Sulfur Transformation: Promoting Sulfur Flow and Toxic H₂S Production

The Impact of Bisphenol A on the Anaerobic Sulfur Transformation: Promoting Sulfur Flow and Toxic H₂S Production