Individual and Combined Effects of Freeze-Thaw and Ferrate(VI) Oxidation for the Treatment and Dewatering of Wastewater Sludges

Diak, James; Örmeci, Banu

doi:10.1007/s11270-016-3039-0

Cited by 13 publications

(6 citation statements)

References 39 publications

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“…The freeze and thaw pre-treatment causes a decrease in the fraction of viable cells (Diak and Örmeci, 2016;Wang et al, 2001). Slow freezing is more preferable than rapid freezing or excessively lower temperatures (Wang et al, 2001).…”

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confidence: 99%

Pre-treatments to enhance the biodegradability of waste activated sludge: Elucidating the rate limiting step

Gonzalez

Hendriks

Lier

et al. 2018

Biotechnology Advances

216

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Pre-treatments for waste activated sludge (WAS) are, in most cases, an attempt to increase the biodegradation and/or improve hydrolysis rate of WAS after anaerobic digestion. This review presents an extensive analysis of WAS pre-treatments effectiveness focusing on increasing the biodegradability. In the first part of the review, WAS is considered as a cluster of organic components: proteins, carbohydrates, humic substances and cells. Based on this breakdown into components, the effect of different pre-treatments on each component (and in combination) is described. Also, possible reasons for the contradictory results frequently found among different studies dealing with the same pre-treatment are included. In the second part, the review describes the effects on volatile solids removal by digestion after pre-treatment and on the dewaterability of the final digestate. The energy balance and potential limiting factors for each pre-treatment are also taken into account. From the published works it is concluded that some pre-treatment techniques, such as thermal hydrolysis, thermal phased anaerobic digestion and low-temperature pre-treatment are effective ways to increase energy production and to improve other sludge properties, such as dewatering. However, these techniques are very energy intensive and require a large capital outlay, so research on milder pre-treatment techniques is valuable.

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mentioning

confidence: 99%

Pre-treatments to enhance the biodegradability of waste activated sludge: Elucidating the rate limiting step

Gonzalez

Hendriks

Lier

et al. 2018

Biotechnology Advances

216

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“…The DS was a mixture characterized by multi phases (solid and liquid phases). For the insoluble part, which was termed as extracellular biological organic matter (EBOM), NH 4 OH was employed as an effective extractant following the specifically described extraction procedures [16,17]. The microbial communities of anode biofilm from F/T-MEC were examined by high-throughput 16 S rRNA pyrosequencing as described [11].…”

Section: Methodsmentioning

confidence: 99%

“…Among these methods, freezing-thawing (F/T) is recognized as an efficient treatment with less energy intensive, especially in the cold-climate regions [1,2]. Many studies have demonstrated the effect of sludge disruption, solubilization of organic matter, and improvement of dewaterability via this treatment [3][4][5]. However, regarding DS, the impact of F/T treatment on the physical and chemical properties was unknown yet.…”

Section: Introductionmentioning

confidence: 99%

Combined freezing-thawing pretreatment and microbial electrolysis cell for enhancement of highly concentrated organics degradation from dewatered sludge

Jia

Cheng

et al. 2020

Bioengineered

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2020) Combined freezing-thawing pretreatment and microbial electrolysis cell for enhancement of highly concentrated organics degradation from dewatered sludge, Bioengineered, 11:1, 301-310, ABSTRACTThe influence of freezing-thawing (F/T) pretreatment on the degradation of highly concentrated organic matters from dewatered sludge (DS) in microbial electrolysis cell (MEC) was investigated in this study. Extended freezing disintegrated the DS matrix and resulted in accelerated hydrolysis rate. The biogas production and stabilization were increased due to the pretreatment by 25-70% of H 2 production rate and 17.8-33.8% of COD reduction rate, respectively. Fourier transform infrared spectroscopy analysis indicated that the pretreatment was unable to alter the bioelectrochemical reactions except for accelerating degradation rate. Excitation and emission matrix (EEM) spectra showed that aromatic protein and soluble microbial products (SMPs)like materials in DS were increasingly solubilized by the pretreatment and significantly removed during electrogenesis. The F/T-pretreated DS favored the enrichment of exoelectrogens in MEC. ARTICLE HISTORY

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“…Freeze-thaw cycles are widely known to increase dewaterability (or ability to lose water) in biosolids through structure modifications [67][68][69][70] . Recent investigations have demonstrated that freeze-thaw cycles can inactivate bacterial pathogens [71][72][73] in dewatered sanitary wastewater (blackwater) 74 , stabilization ponds 75 , activated sludge 76,77 , reed beds 66 , untreated wastewater treatment solids 77 80 .…”

Section: Biosolids Treatmentmentioning

confidence: 99%

“…Freeze-thaw cycles naturally occur in biosolids over winter storage in northern climates. Freeze-thaw cycles increase dewaterability (or ability to lose water) of biosolids [67][68][69][70] and can inactivate pathogens in biosolids. However, little is known about the effect of pathogen inactivation in anaerobically digested biosolids.…”

Section: Objective 1: Effects Of Freeze-thaw Cycles On Biosolidsmentioning

confidence: 99%

Mechanisms of Pathogen Inactivation in Wastewater and Pharmaceutical Applications

Meingast¹

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Individual and Combined Effects of Freeze-Thaw and Ferrate(VI) Oxidation for the Treatment and Dewatering of Wastewater Sludges

Cited by 13 publications

References 39 publications

Pre-treatments to enhance the biodegradability of waste activated sludge: Elucidating the rate limiting step

Pre-treatments to enhance the biodegradability of waste activated sludge: Elucidating the rate limiting step

Combined freezing-thawing pretreatment and microbial electrolysis cell for enhancement of highly concentrated organics degradation from dewatered sludge

Mechanisms of Pathogen Inactivation in Wastewater and Pharmaceutical Applications

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