The relationship between cation ions and polysaccharide on the floc formation of synthetic and activated sludge

Nguyễn, Tấn Phong; Hilal, Nidal; Hankins, Nicholas P.; Novak, John T.

doi:10.1016/j.desal.2007.05.038

Cited by 25 publications

(16 citation statements)

References 18 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…As a result of the above, an increase was found in the soluble organics concentration. Subsequently, a decrease in the soluble organics concentration in the medium was noticed after 45 min, and this could be due to oxidation of the released soluble organics by OH radicals . Once the oxidation of all the released soluble organics was over, OH radical started to cleave the microbial cell wall, releasing intracellular organics .…”

Section: Resultscontrasting

confidence: 65%

“…Subsequently, a decrease in the soluble organics concentration in the medium was noticed after 45 min, and this could be due to oxidation of the released soluble organics by OH radicals. 28 Once the oxidation of all the released soluble organics was over, OH radical started to cleave the microbial cell wall, releasing intracellular organics. 29 In contrast to our expectation, very little organics were released in this phase.…”

Section: Effect Of Exocellular Fractionation By Immobilized Titanium mentioning

confidence: 99%

See 1 more Smart Citation

Nano‐layered TiO₂ for effective bacterial disintegration of waste activated sludge and biogas production

Sharmila

Banu

Gunasekaran

et al. 2018

J of Chemical Tech & Biotech

View full text Add to dashboard Cite

BACKGROUND Proper management of the huge amount of waste activated sludge generated during the conventional treatment of wastewater is nowadays a major environmental issue. Proper treatment of sludge needs huge investment and proper handling. To address this issue, the immobilized photocatalyst (TiO2) mediated exocellular fractionation of bacterial pretreatment for anaerobic digestion was utilized as a sludge treatment technique. RESULT Ti was deposited on glass substrate by a DC spluttering technique, and a TiO2 layer was formed by annealing in oxygen atmosphere. This immobilized TiO2 efficiently extricated the extracellular components after 45 min by removing 99% of the total extractable extracellular polymeric substances. The exocellular fractionated bacterial pretreatment induced 20% of COD solubilization with methane generation of about 0.0217 g COD g‐1 COD d‐1, which was higher than the sludge without any treatment and sludge with bacterial pretreatment only. CONCLUSION An 8% increase in COD solubilization was achieved, which generated high quantities of methane. With the advantage of methane generation, the maximum profitable sludge reduction was obtained. Thin film deposition of TiO2 enables easy recovery of TiO2. The cost, energy, and solid balance analysis confirmed that this treatment method is field applicable. © 2018 Society of Chemical Industry

show abstract

Section: Resultscontrasting

confidence: 65%

Section: Effect Of Exocellular Fractionation By Immobilized Titanium mentioning

confidence: 99%

Nano‐layered TiO₂ for effective bacterial disintegration of waste activated sludge and biogas production

Sharmila

Banu

Gunasekaran

et al. 2018

J of Chemical Tech & Biotech

View full text Add to dashboard Cite

show abstract

“…However, further increase of Mg 2+ did not yield an increase in the SHb% of ZB2. This result is in agreement with that of Nguyen et al [49]. It is also reported that the addition of Mg 2+ to sludge had no effect on the bound water content [57].…”

Section: The Main Effect Of Cations On Shb Of Zl Zb1 and Zb2supporting

confidence: 93%

“…5-7 show that the AAg of ZB1 and ZB2 increased with increasing Al 3+ . It has been reported that Al 3+ can be used to reduce the required time for granule formation and increase aggregation rate [49]. Unlike most metal cations, Al 3+ is not required either in the macro or even micro-organisms as nutrients in biological growth [50].…”

Section: The Main Effect Of Cations On Aag Of Zl Zb1 and Zb2mentioning

confidence: 99%

The effect of divalent and trivalent cations on aggregation and surface hydrophobicity of selected microorganism

Alias

Muda

Affam³

et al. 2016

Environmental Engineering Research

View full text Add to dashboard Cite

This study investigated the effect of various cations (Ca 2+ , Mg 2+ , Al 3+ , Mn 2+ , Zn 2+ ) on the autoaggregation (AAg) and surface hydrophobicity (SHb) of three different bacteria (Brevibacillus panacihumi strain (ZB1), Lysinibacillus fusiformis strain (ZB2) and Enterococcus faecalis strain (ZL)) using a 2-level factorial design. The AAg ratio was measured from the changes in the absorbance of the media. Results show that ZB2 had maximum AAg for the three bacteria investigated. A microscopic clustering of cells was observed when Ca 2+ was added to ZB2. The AAg was in the range of 62%, 58% and 34% for ZB2, ZB1 and ZL, respectively and correlated to the SHb. The aggregation and SHb of the microbial cells increased with increasing ionic strength due to the repulsive steric or overlap forces between the polymer covered surfaces. Ca 2+ demonstrated a more significant effect on aggregation and SHb of microbial cells due to an attractive binding force.

show abstract

“…It is reasonable to assume that EPS play a leading role in flocculation, settling and dewatering properties of the flocs. The exact role in the floc formation is not well understood, but previous studies indicated that they are important for flocculation to occur [3]. In addition to, the precise role of EPS in biosolid-liquid separation is not well understood.…”

Section: Introductionmentioning

confidence: 99%

Effect of C/N ratio on extracellular polymeric substances (EPS) and physicochemical properties of activated sludge flocs

Liu

2011

Journal of Hazardous Materials

158

View full text Add to dashboard Cite

The relationship between cation ions and polysaccharide on the floc formation of synthetic and activated sludge

Cited by 25 publications

References 18 publications

Nano‐layered TiO₂ for effective bacterial disintegration of waste activated sludge and biogas production

Nano‐layered TiO₂ for effective bacterial disintegration of waste activated sludge and biogas production

The effect of divalent and trivalent cations on aggregation and surface hydrophobicity of selected microorganism

Effect of C/N ratio on extracellular polymeric substances (EPS) and physicochemical properties of activated sludge flocs

Contact Info

Product

Resources

About

The relationship between cation ions and polysaccharide on the floc formation of synthetic and activated sludge

Cited by 25 publications

References 18 publications

Nano‐layered TiO2 for effective bacterial disintegration of waste activated sludge and biogas production

Nano‐layered TiO2 for effective bacterial disintegration of waste activated sludge and biogas production

The effect of divalent and trivalent cations on aggregation and surface hydrophobicity of selected microorganism

Effect of C/N ratio on extracellular polymeric substances (EPS) and physicochemical properties of activated sludge flocs

Contact Info

Product

Resources

About

Nano‐layered TiO₂ for effective bacterial disintegration of waste activated sludge and biogas production

Nano‐layered TiO₂ for effective bacterial disintegration of waste activated sludge and biogas production