Stabilisation and dewatering of primary sludge using ferrate(VI) pre-treatment followed by freeze-thaw in simulated drainage beds

Diak, James; Örmeci, Banu

doi:10.1016/j.jenvman.2017.10.065

Cited by 19 publications

(4 citation statements)

References 39 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…When used as a disinfectant, studies have shown that ferrate(VI) salt is more effective than chlorine in reducing different types of bacteria and viruses [37,78]. Furthermore, ferrate(VI) has been used to control odour, to remove pharmaceutical pollutants such as amoxicillin, ciprofloxacin, 2,4-dichlorophenoxyacetic acid, and flurbiprofen from wastewater [74], to stabilise and dewater primary sludge [83], and to remove freshwater humic substances from water [84].…”

Section: Application Of Ferrate(vi) Saltsmentioning

confidence: 99%

Production, Characterization and Application of Ferrate(VI) in Water and Wastewater Treatments

Munyengabe¹,

Zvinowanda²

2019

Br J Anal Chem

View full text Add to dashboard Cite

Investigation into the production, characterization and application of ferrate(VI) in water and wastewater treatment to enable metal removal through oxidation and coagulation processes and recommended in perspective for AMD treatment as a sustainable process. Revieworganic chemicals, endocrine disrupting chemicals, heavy metals, metal-complexed species, and others in water decontamination processes. Studies also showed that ferrate(VI) salt can be classified as a green chemical which can replace different disinfectants and oxidants producing toxic disinfectant by-products generated by the use of chemicals such as chlorine and chlorine dioxide. Mining industry is another sector, which still has a problem of high energy consumption during acid mine drainage (AMD) treatment. This is due to extensive stirring and aeration which required to facilitate the oxidation of Fe(II) ions. However, the authors recommend the use of ferrate(VI) salt for AMD treatment as it can work as a powerful oxidant converting Fe(II) to Fe(III) and act as a coagulant in a single treating unit, hence, thus reducing energy consumption and environmental pollution problems.

show abstract

Section: Application Of Ferrate(vi) Saltsmentioning

confidence: 99%

Production, Characterization and Application of Ferrate(VI) in Water and Wastewater Treatments

Munyengabe¹,

Zvinowanda²

2019

Br J Anal Chem

View full text Add to dashboard Cite

show abstract

“…F/T treatment can not only improve the dewatering performance of sludge, but also reduce the activity of harmful microorganism cells and kill microorganisms. According to Diak et al (Diak and Örmeci 2018), in the study of ferrate pretreatment combined with F/T dehydration, ice crystals formed by freezing would puncture part of the microbial cells to reduce the microbial activity and the content of harmful cells in the sludge. Therefore, F/T is applied in cold areas to improve the sludge dewatering performance and avoid the di culty of biological treatment and the freezing of equipment caused by low temperature (Martel 1993).…”

Section: Introductionmentioning

confidence: 99%

Freeze–thaw combined with activated carbon improves electrochemical dewaterability of sludge: Analysis of sludge floc structure and dewatering mechanism

Huang

Song

Yin

et al. 2021

Preprint

View full text Add to dashboard Cite

Freeze–thaw (F/T) and electrochemistry are environment-friendly and efficient sludge treatment technologies. In this study, F/T and electrochemistry were combined in the pretreatment of sludge dewatering in the laboratory, and activated carbon (AC) was added to improve the electrochemical dewatering performance of sludge. During the experiment, the effect of F/T on the floc structure was analyzed by a laser particle analyzer and scanning electron microscope. F/T treatment not only improved the dewatering performance of sludge, but also promoted the aggregation of sludge flocs into larger particles. The median diameter (D50) increased from 45.27 µm to 128.94 µm. Then, the intracellular polymer of large-particle sludge was analyzed by three-dimensional excitation–emission matrix (3D-EEM). The tightly bound extracellular polymeric substances (TB-EPS) still contained a large amount of protein substances, which hindered the improvement of sludge dewatering performance. AC was added to the thawed sludge solution before electrochemical treatment (EP). The conductivity of AC enhanced the effect of EP, thereby cracking the sludge flocs. Thus, the light intensity of TB-EPS in the 3D-EEM fluorescence spectroscopy was decreased, and the D50 was also reduced to 105.3 µm. The final specific resistance of filtration and water content were reduced by 96.39% and 32.17%, respectively. Element analysis of the sludge cake after dehydration showed that the addition of AC significantly improved the combustion efficiency of the sludge cake. Moreover, preliminary economic analysis showed that the cost of this research was low, which indicated the potential application value of combined treatment.

show abstract

“…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

View full text Add to dashboard Cite

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

show abstract

Stabilisation and dewatering of primary sludge using ferrate(VI) pre-treatment followed by freeze-thaw in simulated drainage beds

Cited by 19 publications

References 39 publications

Production, Characterization and Application of Ferrate(VI) in Water and Wastewater Treatments

Production, Characterization and Application of Ferrate(VI) in Water and Wastewater Treatments

Freeze–thaw combined with activated carbon improves electrochemical dewaterability of sludge: Analysis of sludge floc structure and dewatering mechanism

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

Contact Info

Product

Resources

About