Dewatering of activated sludge by Fenton's reagent

Lu, Ming‐Chun; Lin, Chien‐Jung; Liao, Chih‐Hsiang; Huang, Ruijie; Ting, Wang-Ping

doi:10.1016/s1093-0191(02)00039-4

Cited by 125 publications

(52 citation statements)

References 5 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Hence, it is easier to obtain a high solid content dewatered cake when its initial VSS/TSS was lower than 50.0 wt% and initial SC was higher than 3.0 wt%. It should be noted that there is no agreed standard unit for dosages of various chemical conditioners, and different units were used for sludge conditioning, such as ''mg/L'' (Lu et al 2003;Wang et al 2009), ''mg/g dry solid'' (He et al 2015;Liu et al 2012;Mo et al 2015), ''v/v'' (Zhang et al 2015) and ''mmol/g VSS'' (Zhen et al 2012). In view of the importance of SC and VSS/TSS in sludge conditioning, an integrated dosage optimization method which based on the SC and VSS/TSS should be further considered for sludge conditioning.…”

Section: Correlation Of Dewatering Performance Parametersmentioning

confidence: 99%

See 1 more Smart Citation

Principal component analysis on sewage sludge characteristics and its implication to dewatering performance with Fe2+/persulfate-skeleton builder conditioning

Shi

Yang

Liang

et al. 2016

Int. J. Environ. Sci. Technol.

View full text Add to dashboard Cite

show abstract

Section: Correlation Of Dewatering Performance Parametersmentioning

confidence: 99%

“…In recent years, Fenton and Fenton-like processes, as one group of advanced oxidation processes, have been widely investigated and proved to be an efficient chemical conditioning for sludge (He et al 2015;Lu et al 2003;Mo et al 2015;Zhou et al 2015). We have previously utilized Fe 2?…”

Section: Introductionmentioning

confidence: 99%

Principal component analysis on sewage sludge characteristics and its implication to dewatering performance with Fe2+/persulfate-skeleton builder conditioning

Shi

Yang

Liang

et al. 2016

Int. J. Environ. Sci. Technol.

View full text Add to dashboard Cite

show abstract

“…In particular, it is unclear on the fate of the polymer residual when the dewatered sludge cakes (which contain the residues of the polymer used) are landfilled as a final disposal option (Majam and Thompson, 2006;Bolto and Gregory, 2007). The use of Fenton's reagent (Fe 2+ /H 2 O 2 ) as one of the AOPs (Chiron et al, 2000, Neyens andBaeyens, 2002;Perez et al, 2002;Will et al, 2004) has been used as an alternative conditioner particularly in wastewater sludge conditioning (Mustranta and Viikari, 1993;Vosteen and Weiuenberg, 2000;Lu et al, 2003;Neyens et al, 2003;Buyukkamaci, 2004;Dewil et al, 2005). On the contrary, there is very little information found in the literature on the use of the Fenton's reagent for water treatment sludge conditioning.…”

Section: Introductionmentioning

confidence: 99%

Exploitation of Fenton and Fenton-like reagents as alternative conditioners for alum sludge conditioning

Tony

Zhao

Tayeb

2009

Journal of Environmental Sciences

View full text Add to dashboard Cite

In spite of the less efficiency in CST reduction of Fenton's reagent in alum sludge conditioning compared with that of polymer conditioning, is less than that of polymer conditioning. This study provided an example of proactive treatment engineering which is aimed at seeking a safe alternative to the use of polymers in sludge conditioning towards achieving a more sustainable sludge management strategy.

show abstract

“…Lu et al(2003) applied Fenton-like reagent (Fe 3+ /H 2 O 2 ) on WAS and attained promising effect (Reduction rate of SRT by around 85%) (Tony et al, 2008 Beyond classical Fenton process, lab-scale photo-Fenton process was also applied in sludge treatment. Tokumura et al (2007) incorporated a photo reactor with a UV lamp as the photo source.…”

Section: Application In Sludge Conditioningmentioning

confidence: 99%

“…Advanced oxidization methods such as classical Fenton reaction could be applied on sludge conditioning process (Lu et al, 2003;Neyens et al, 2003b). The hydroxyl radicals produced by Fenton reaction are highly oxidative, and could change the structure of sludge, thus improving the sludge dewaterablity.…”

Section: Introductionmentioning

confidence: 99%

Improving dewaterability of waste activated sludge through advanced oxidization process

Zhou¹

View full text Add to dashboard Cite

The production of excess sludge in biological wastewater treatment processes has been a serious issue for the operation of wastewater treatment plants (WWTPs) on both economic and environmental sides. To reduce the volume of sludge to be disposed of, the sludge dewaterability needs to be improved through conditioning processes. Many conditioning methods have been developed and applied for this purpose. Among them, the advanced oxidization process is a promising technique due to its high efficiency, and economical and environmental advantages. The aim of this thesis is to apply a series of novel advanced oxidization techniques on sludge conditioning process for the improvement of sludge dewaterability, such as the indigenous iron activated peroxidation and zero-valent iron (ZVI)/hydrogen peroxide, zero-valent iron/persulfate. Also, the role of extracellular polymeric substances (EPS) during the advanced oxidization process was also investigated to expand the knowledge of basic mechanism on the sludge dewaterability.Capillary suction time stands for the time needed for completing the filtration of sludge, is used as quantitative indexes for the evaluation of the sludge dewaterability.The indigenous iron was firstly utilized as the substitute for externally supplied iron salt to improve dewaterability of waste activated sludge through catalysing the hydrogen peroxide. Significant improvement in sludge dewaterability was attained after the addition of hydrogen peroxide at 30 mg/g total solid (TS) and 28 mg/g TS under acidic conditions (pH = 3.0), with the highest reduction of capillary suction time being 68% and 56%, respectively, for sludge containing an iron concentration of 56 mg Fe/g TS and 25 mg Fe/g TS, respectively. The observations were due to Fenton reactions between the iron contained in sludge (indigenous iron) and hydrogen peroxide. For the sludge with an insufficient level of indigenous iron, the addition of iron salt was found to be able to improve the sludge dewaterability.To expand the understanding of the indigenous iron activated advanced oxidization process, the effect of indigenous iron activated peroxidation on methane production from waste activated sludge was also investigated. Pre-treatment of waste activated sludge for 30 min at 50 mg H 2 O 2 /g TS and pH 2.0 (iron concentration in sludge was 7 mg/g TS) substantially enhanced waste activated sludge solubilization. Biochemical methane potential tests demonstrated that methane production was II improved by 10% at a digestion time of 16 d after incorporating the indigenous iron activated peroxidation pre-treatment.The combined conditioning process with zero-valent iron and hydrogen peroxide was applied to improve dewaterability of a full-scale waste activated sludge. The combination of ZVI and hydrogen peroxide at pH 2.0 substantially improved the waste activated sludge dewaterability due to Fentonlike reactions. The highest improvement in waste activated sludge's dewaterability was attained at 500 mg ZVI/L and 250 mg hydrogen peroxide/...

show abstract

Dewatering of activated sludge by Fenton's reagent

Cited by 125 publications

References 5 publications

Principal component analysis on sewage sludge characteristics and its implication to dewatering performance with Fe2+/persulfate-skeleton builder conditioning

Principal component analysis on sewage sludge characteristics and its implication to dewatering performance with Fe2+/persulfate-skeleton builder conditioning

Exploitation of Fenton and Fenton-like reagents as alternative conditioners for alum sludge conditioning

Improving dewaterability of waste activated sludge through advanced oxidization process

Contact Info

Product

Resources

About