Insights into cetyl trimethyl ammonium bromide improving dewaterability of anaerobically fermented sludge

Li, Zijing; Li, Yifu; Wang, Dongbo; Yuan, Longhu; Liu, Xuran; Pan, Chuli; Zhang, Xunkuo

doi:10.1016/j.cej.2022.134968

Cited by 16 publications

(5 citation statements)

References 53 publications

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“…The solid–liquid separation performance of fermented mixtures, i.e., the dewaterability of sludge, is another key issue determining whether fermentation technology can be applied in practice and affecting the cost of sludge final disposal. Generally, the fermentation process was proven to deteriorate the dewaterability of sludge, and most pretreatment or process control methods exacerbated this deteriorating effect. ,, For instance, Wang et al reported that with 2.084 g/L sodium dodecyl sulfate (SDS) addition, the CST of activated sludge raised to 5.1 times that of the control . Liu et al found that after 12 days of fermentation under alkaline condition (pH10 maintained by NaOH), the CST of sludge rose to 20.3 times that of the raw sludge .…”

Section: Resultsmentioning

confidence: 99%

“…Overall, CTAB conditioning was proved to cause obvious disintegration of WAS with the disruption of EPS, which is one reason for CTAB to promote SCFA production from WAS. It is worth noting that high concentrations of CTAB enhanced WAS disintegration, but a low accumulation of SCFAs was observed, which might be due to the large amounts of CTAB allowing it to exert a bactericidal effect, 27 thus inhibiting the activity of the microbial community.…”

Section: Effects Of Ctab On the Disintegration Of Wasmentioning

confidence: 98%

“…Generally, the fermentation process was proven to deteriorate the dewaterability of sludge, and most pretreatment or process control methods exacerbated this deteriorating effect. 21,27,51 For instance, Wang et al reported that with 2.084 g/L sodium dodecyl sulfate (SDS) addition, the CST of activated sludge raised to 5.1 times that of the control. 21 Liu et al found that after 12 days of fermentation under alkaline condition (pH10 maintained by NaOH), the CST of sludge rose to 20.3 times that of the raw sludge.…”

Section: Effects Of Ctab On the Microbial Community In The Fermentationmentioning

confidence: 99%

“…Cetyltrimethylammonium bromide (CTAB) is a typical cationic surfactant which has been extensively used in many applications as a bactericide, softener, catalyzer, and emulsifier . Recently, the use of CTAB to enhance sludge dewaterability has been investigated, and the results showed that CTAB is a promising conditioner for sludge dehydration. , Our previous study also proved that CTAB disrupts the cell membrane of bacteria in a sludge mixture and releases organics into the liquid phase, suggesting that CTAB is likely to improve SCFA production from WAS fermentation.…”

Section: Introductionmentioning

confidence: 99%

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Cetyltrimethylammonium Bromide Enhances Anaerobic Fermentative Production of Short-Chain Fatty Acids from Waste Activated Sludge

Li,

Liu

et al. 2023

ACS EST Eng.

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Anaerobic fermentation for short-chain fatty acid (SCFA) production has attracted much attention in the field of waste activated sludge (WAS) treatment. However, the SCFA yield is limited. This study reports a new, efficient, and cost-effective strategy to improve SCFA production from anaerobic fermentation of WAS by cetyltrimethylammonium bromide (CTAB) intervention. Experimental results proved that CTAB improved the yield and quality of SCFAs: a SCFA yield of 273.5 mg of COD/g of volatile suspended solids (VSS) was obtained at 0.03 g/g total suspended solid CTAB addition, which improved by 443% compared with the control (50.3 mg of COD/g of VSS); the percentage of acetic acid raised from 5.6% (without CTAB) to 33.7–44.2% (with CTAB). Mechanism exploration established that CTAB enhanced the disintegration of WAS and improved the biodegradability of released organics, thus offering more available substances for SCFA production. Microbial community analyses showed that CTAB increased the relative abundance of hydrolytic microorganisms (e.g., IMCC26207 and unclassified_f__Enterobacteriaceae) and SCFA producers (e.g., Romboutsia and Escherichia-Shigella), and reduced the relative abundances of SCFA consumers (e.g., Candidatus_Competibacter), which were conducive to SCFA accumulation. The economic analysis showed that CTAB intervention exhibited a comparable or higher economic benefit over some traditional pretreatment approaches (e.g., thermal and CaO2-based advanced oxidation) for WAS anaerobic fermentation. The findings of this study expand the application field of CTAB and provide new insights into WAS anaerobic fermentation technology.

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Section: Resultsmentioning

confidence: 99%

Section: Effects Of Ctab On the Disintegration Of Wasmentioning

confidence: 98%

Section: Effects Of Ctab On the Microbial Community In The Fermentationmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Cetyltrimethylammonium Bromide Enhances Anaerobic Fermentative Production of Short-Chain Fatty Acids from Waste Activated Sludge

Li,

Liu

et al. 2023

ACS EST Eng.

Self Cite

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“…The trend of change in the moisture content of the sludge cake was similar to that of the sludge resistivity SRF, further indicating that excess PFS had an inhibitory effect on sludge dewatering performance. With a suitable PAC dosage, the organic matter can be retained effectively and the COD of the filtrate gradually decreases [ 30 ]. If the PAC dosage is too high, the organic matter in the sludge cannot be retained effectively.…”

Section: Resultsmentioning

confidence: 99%

Enhanced Dewatering of Activated Sludge by Skeleton-Assisted Flocculation Process

Xia¹,

Rao²,

Ji³

et al. 2022

IJERPH

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Sludge dewatering is the fundamental process of sludge treatment. Environmentally friendly and efficient sludge conditioning methods are the premises of sludge to achieve dehydration reduction and resource utilization. In response to sewage plant sludge dehydration, fly ash (FA), polymerized aluminum chloride (PAC), and polymer sulfate (PFS) were studied separately to determine their sludge dehydration performance, and the effects of these three conditioner composite regulations on sludge dehydration properties were studied. Compared to the sludge treated only with conditioner, the average particle size of floc increased and the organic matter content in the filtrate decreased. The sludge dewatering efficiency after the conditioning effect is better than that after conditioning a single conditioner. After PFS conditioning with fly ash, the water content and specific resistance (SRF) of the sludge cake can be reduced to 76.39% and 6.63 × 1010 m/kg, respectively. The moisture content and specific resistance (SRF) of the sludge cake can be reduced to 76.10% and 6.91 × 1010 m/kg, respectively. The pH of the sludge and filtrate changed slightly after PAC conditioning with fly ash coupling. These results indicate that fly-ash coupled with PAC and fly-ash coupled with PFS are expected to become a novel and effective environmental protection combined conditioning method for sludge dewatering.

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Sulfite-based pretreatment promotes volatile fatty acids production from microalgae: Performance, mechanism, and implication

et al. 2022

Bioresource Technology

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Insights into cetyl trimethyl ammonium bromide improving dewaterability of anaerobically fermented sludge

Cited by 16 publications

References 53 publications

Cetyltrimethylammonium Bromide Enhances Anaerobic Fermentative Production of Short-Chain Fatty Acids from Waste Activated Sludge

Cetyltrimethylammonium Bromide Enhances Anaerobic Fermentative Production of Short-Chain Fatty Acids from Waste Activated Sludge

Enhanced Dewatering of Activated Sludge by Skeleton-Assisted Flocculation Process

Sulfite-based pretreatment promotes volatile fatty acids production from microalgae: Performance, mechanism, and implication

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