Improving dewaterability of waste activated sludge by combined conditioning with zero-valent iron and hydrogen peroxide

2014 ◽  
Vol 174 ◽  
pp. 103-107 ◽  
Author(s):  
Xu Zhou ◽  
Qilin Wang ◽  
Guangming Jiang ◽  
Xiwang Zhang ◽  
Zhiguo Yuan
Keyword(s):  
Hydrogen Peroxide ◽  
Activated Sludge ◽  
Zero Valent Iron ◽  
Waste Activated Sludge

Waste activated sludge disintegration by hydroxyl and sulfate radical-based oxidation: a comparative study

2019 ◽  
Vol 5 (11) ◽  
pp. 2027-2040 ◽  
Author(s):  
Hanife Sari Erkan
Keyword(s):  
Hydrogen Peroxide ◽  
Comparative Study ◽  
Activated Sludge ◽  
Sulfate Radical ◽  
Waste Activated Sludge ◽  
Calcium Hypochlorite

To the best of my knowledge, this is the first study in the literature where hydrogen peroxide, calcium hypochlorite, peroxymonosulfate and peroxydisulfate were comparatively investigated in a study.

scholarly journals Effect of H2O2Oxidation/Alkaline Hydrolysis on Waste Activated Sludge Disintegration and Dewaterability

2018 ◽  
Vol 65 ◽  
pp. 05021 ◽  
Author(s):  
Gan Chin Heng ◽  
Mohamed Hasnain Isa ◽  
Ming Han Lim
Keyword(s):  
Hydrogen Peroxide ◽  
Reaction Time ◽  
Activated Sludge ◽  
Alkaline Hydrolysis ◽  
Optimum Operating ◽  
Waste Activated Sludge ◽  
Operating Parameters ◽  
Peroxide Oxidation ◽  
Operating Variables ◽  
H2o2 Oxidation

In the present study, the effect of hydrogen peroxide oxidation/alkaline hydrolysis was investigated on waste activated sludge (WAS), to enhance its disintegration and dewaterability. The effects of three operating parameters viz., pH, H2O2dose and reaction time, on the degree of WAS disintegration and dewaterability were assessed using response surface methodology. The optimum operating variables to achieve VSS removal 20%, CST reduction 20%, sCOD 6100 mg/L and EPS 455 mg/L were: pH 10.5, 1300 g H2O2/kg TS and 40 min reaction time. Results showed that WAS can be efficiently disintegrated and dewatered by H2O2 oxidation/alkaline hydrolysis for subsequent biological digestion.

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