Role of organic compounds from different EPS fractions and their effect on sludge dewaterability by combining anaerobically mesophilic digestion pre-treatment and Fenton’s reagent/lime

2017 ◽  
Vol 321 ◽  
pp. 123-138 ◽  
Author(s):  
Yongkang Dai ◽  
Shaosong Huang ◽  
Jialin Liang ◽  
Siwei Zhang ◽  
Shuiyu Sun ◽  
...  
Keyword(s):  
Organic Compounds ◽  
Fenton’S Reagent ◽  
Fenton's Reagent ◽  
Mesophilic Digestion ◽  
Sludge Dewaterability ◽  
Pre Treatment

scholarly journals Improved sludge dewaterability and hydrolysis performance after pretreatment with Fenton's reagent

2017 ◽  
Vol 77 (1) ◽  
pp. 204-210 ◽  
Author(s):  
Hongying Yuan ◽  
Yuping Yang ◽  
Jian Yuan ◽  
Yanning Wang ◽  
Yameng Song ◽  
...  
Keyword(s):  
Volatile Fatty Acids ◽  
Oxygen Demand ◽  
Ammonia Nitrogen ◽  
Fenton’S Reagent ◽  
Excess Sludge ◽  
Reaction Conditions ◽  
Fenton's Reagent ◽  
Soluble Polysaccharide ◽  
Soluble Chemical Oxygen Demand ◽  
Sludge Dewaterability

Abstract The dewaterability of excess sludge significantly improved upon pretreatment with Fenton's reagent in this study. After 0.9 g/L of Fe2+ and 5.0 g/L of H2O2 were added to the sludge, and reacted for 2 h at pH = 4, the specific resistance to filtration (SRF) of the excess sludge decreased from an initial value of 29.74 × 1012 m/kg to 6.49 × 1012 m/kg. The factors that affected this improvement in sludge dewaterability as evaluated by SRF reduction showed the following order: H2O2 > pH > Fe2+ > reaction time. Furthermore, the hydrolysis performance of the sludge under the optimal reaction conditions was investigated. The results indicated that the concentration of soluble chemical oxygen demand in the supernatant increased almost 14 times compared to raw sludge, and the contents of soluble protein and soluble polysaccharide were more than 8 and 17 times higher, respectively, than for the untreated situation. However, the amounts of ammonia nitrogen (NH4+-N) and phosphate (PO43−-P) released from the sludge showed different trends: NH4+-N increased by 200%, while PO43−-P decreased by 82%. The production of volatile fatty acids (VFAs) from the treated sludge showed that total VFAs increased by 66%, and iso-butylacetic acid was the dominant product among the total VFAs.

scholarly journals Comparison of Landfill Leachate Treatment Efficiency Using the Advanced Oxidation Processes

2013 ◽  
Vol 39 (2) ◽  
pp. 107-115 ◽  
Author(s):  
Barbara Pieczykolan ◽  
Izabela Płonka ◽  
Krzysztof Barbusiński ◽  
Magdalena Amalio-Kosel
Keyword(s):  
Hydrogen Peroxide ◽  
Organic Compounds ◽  
Advanced Oxidation Processes ◽  
Potassium Dichromate ◽  
Advanced Oxidation ◽  
Fenton’S Reagent ◽  
Nitrogen And Phosphorus ◽  
Leachate Treatment ◽  
Fenton's Reagent ◽  
Oxidation Processes

Abstract Treatment of leachate from an exploited since 2004 landfill by using two methods of advanced oxidation processes was performed. Fenton’s reagent with two different doses of hydrogen peroxide and iron and UV/H2O2 process was applied. The removal efficiency of biochemically oxidizable organic compounds (BOD5), chemically oxidizable compounds using potassium dichromate (CODCr) and nutrient (nitrogen and phosphorus) was examined. Studies have shown that the greatest degree of organic compounds removal expressed as a BOD5 index and CODCr index were obtained when Fenton’s reagent with greater dose of hydrogen peroxide was used - efficiency was respectively 72.0% and 69.8%. Moreover, in this case there was observed an increase in the value of ratio of BOD5/CODCr in treated leachate in comparison with raw leachate. Application of Fenton’s reagent for leachate treatment also allowed for more effective removal of nutrients in comparison with the UV/H2O2 process.

Role of reduced empty bed contact times and pre-treatment by coagulation with Fe(III) salts on the removal of trace organic compounds during sequential biofiltration

2019 ◽  
Vol 685 ◽  
pp. 220-228 ◽  
Author(s):  
Johann Müller ◽  
Silvia Levai ◽  
Leonardo Titzschkau ◽  
Nikolina Popović ◽  
Dragan Carevic ◽  
...  
Keyword(s):  
Organic Compounds ◽  
Trace Organic Compounds ◽  
Pre Treatment ◽  
Trace Organic

Studies of oxidation by fenton's reagent using redox titration. I. Oxidation of some organic compounds

1972 ◽  
Vol 25 (1) ◽  
pp. 87 ◽  
Author(s):  
DL Ingles
Keyword(s):  
Organic Compounds ◽  
Organic Substrate ◽  
Oxidation Potential ◽  
Oxidation Products ◽  
Fenton’S Reagent ◽  
Complete Oxidation ◽  
Redox Titration ◽  
Fenton's Reagent

Oxidations using Fenton's reagent have not been followed previously by redox titration. This procedure assists in defining the overall reaction and allows both an estimate of relative rates of oxidation and a measure of the consumption of peroxide by the organic substrate. The peroxide consumed in the complete oxidation of substrate to inactive compounds has been measured by titration at constant oxidation potential. Such measurements reflect the peroxide consumed by the substrate and its consecutive oxidation products and may therefore be used to assess the significance of oxidation pathways.

Sludge dewaterability by dual conditioning using Fenton’s reagent with Moringa oleifera

2019 ◽  
Vol 7 (1) ◽  
pp. 102838 ◽  
Author(s):  
Marie Christine Amie Sene Faye ◽  
Kai Kai Zhang ◽  
Sun Peng ◽  
Yanrong Zhang
Keyword(s):  
Moringa Oleifera ◽  
Fenton’S Reagent ◽  
Fenton's Reagent ◽  
Sludge Dewaterability
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