Enhancing pulp and paper mill biosludge dewaterability using enzymes

Bonilla, Sofia; Tran, Honghi; Allen, D. Grant

doi:10.1016/j.watres.2014.10.057

Cited by 36 publications

(13 citation statements)

References 30 publications

(43 reference statements)

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Sesay et al (2006) found that, with especially higher SRT values, extracting proteins was more effective after enzymatic treatment. In addition, Bonilla suggested that lysozyme aided in the flocculation of particles reducing the polymer demand from 11% to 6%, and conditioning mechanism of lysozyme was similar to that of a flocculant (Bonilla et al, 2015).…”

Section: Introductionmentioning

confidence: 99%

Enhancement of activated sludge dewatering performance by combined composite enzymatic lysis and chemical re-flocculation with inorganic coagulants: Kinetics of enzymatic reaction and re-flocculation morphology

et al. 2015

View full text Add to dashboard Cite

a b s t r a c tThe feasibility of combined process of composite enzymatic treatment and chemical flocculation with inorganic salt coagulants was investigated in this study. The evolution of extracellular polymeric substances (EPS) distribution, composition and morphological properties were analyzed to unravel the sludge conditioning mechanism. It was found that sludge filtration performance was deteriorated due to release of a large amount of biopolymers after enzymatic treatment. The change in EPS followed the pseudo-first-order kinetic equation well under enzymatic treatment. The feeding modes of enzymes had a significant influence on sludge lysis efficiency under compound enzymes treatment. Alpha amylase þ protease was more effective in solubilization than other two addition modes (protease þ aamylase or simultaneous addition). The sludge floc re-formed and macromolecule biopolymers were effectively removed through coagulation process. At the same time, both of filtration rate and cake solid content of sludge treated with enzymes were improved with increasing dosage of coagulants, and ferric iron (FeCl 3 ) had better performance in sludge dewaterability enhancement than polyaluminium chloride (PACl). In addition, sludge filtration property was slightly deteriorated, while the cake moisture reduction was favored at the optimal dosage of inorganic coagulants.

show abstract

Section: Introductionmentioning

confidence: 99%

Enhancement of activated sludge dewatering performance by combined composite enzymatic lysis and chemical re-flocculation with inorganic coagulants: Kinetics of enzymatic reaction and re-flocculation morphology

et al. 2015

View full text Add to dashboard Cite

show abstract

“…• Solid waste and sludge treatment: Solid waste and sludge are generally accompanied with lignocellulosic and cellulosic waste, which can be treated with an enzyme system containing endoglucanase, cellobiohydrolase, and cellobiase and turned into useful products like sugars, ethanol, biogas, and other energetic end products [72]. The enzyme system econase (endo-1, 4-β-d-glucanase, cellobiohydrolase and exo-1, 4-β-dglucosidase) is also helpful in treating MSW [74]. The enzyme system econase (endo-1, 4-β-d-glucanase, cellobiohydrolase and exo-1, 4-β-dglucosidase) is also helpful in treating MSW [74].…”

Section: Enzyme Technology and Water Remediationmentioning

confidence: 99%

Wastewater remediation via combo-technology

Dwevedi

Kayastha

2019

Solutions to Environmental Problems Involving Nanotechnology and Enzyme Technology

View full text Add to dashboard Cite

“…We recently discovered that lysozyme from chicken egg white, a widely-available and well-studied enzyme, shifted the particle size distribution of wastewater secondary sludge towards larger particle sizes, which suggests flocculating activity. [15] Additionally, the use of the same enzyme without catalytic activity (after heat-induced inactivation) also resulted in a similar effect, indicating that the mechanism was not enzymatic. The only report of lysozyme flocculating activity in the literature is by Kamaya et al [16] on yeast (Candida albicans) and a more recent study explored the adsorption of lysozyme on silica nanoparticles and noted the aggregation of such particles by lysozyme.…”

Section: Introductionmentioning

confidence: 95%

“…We recently discovered that lysozyme from chicken egg white, a widely‐available and well‐studied enzyme, shifted the particle size distribution of wastewater secondary sludge towards larger particle sizes, which suggests flocculating activity . Additionally, the use of the same enzyme without catalytic activity (after heat‐induced inactivation) also resulted in a similar effect, indicating that the mechanism was not enzymatic.…”

Section: Introductionmentioning

confidence: 99%

Flocculation with Lysozyme: A Non‐Enzymatic Application

Bonilla

Allen

2016

Can J Chem Eng

View full text Add to dashboard Cite

Bioflocculants have been previously recognized as an alternative to synthetic polymers due to their renewable sources and biodegradability. In this study, the flocculating activity of lysozyme on kaolin suspensions was investigated and compared to a known flocculant, a cationic polyacrylamide. Lysozyme was found to significantly aid in the flocculation of kaolin particles. The flocculating activity of lysozyme on kaolin was affected by the pH of the suspensions, while the addition of Mg2+ and Ca2+ ions did not have a significant effect. Potential industrial applications such as the flocculation of powdered activated carbon and algae suspensions were investigated and the addition of lysozyme resulted in significant flocculation. Furthermore, the flocculating properties of lysozyme are independent of its enzymatic activity. Our results indicate that lysozyme acts as a low molecular mass cationic polymer, where the main mechanism for flocculation on negatively‐charged particles is charge neutralization. Other cationic proteins could potentially be used as bioflocculants to enhance solid‐liquid separation.

show abstract

Enhancing pulp and paper mill biosludge dewaterability using enzymes

Cited by 36 publications

References 30 publications

Enhancement of activated sludge dewatering performance by combined composite enzymatic lysis and chemical re-flocculation with inorganic coagulants: Kinetics of enzymatic reaction and re-flocculation morphology

Enhancement of activated sludge dewatering performance by combined composite enzymatic lysis and chemical re-flocculation with inorganic coagulants: Kinetics of enzymatic reaction and re-flocculation morphology

Wastewater remediation via combo-technology

Flocculation with Lysozyme: A Non‐Enzymatic Application

Contact Info

Product

Resources

About