Reduction of sewage sludge by ball mill pretreatment and Mn catalytic ozonation

The effects of ball mill pretreatment and Mn catalytic ozonation on the reduction of sewage sludge were investigated. The ball mill pretreatment increased ΔSCOD from 2,000mg/L to 9,000 mg/L, as Total Solids (TS) increased from 1% to 4% at a specific energy of 75.8 KJ/g-TSS. The increase in disintegr...

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Bibliographic Details
Published in:KSCE journal of civil engineering 2010, 14(5), , pp.693-697
Main Authors: Lee, Myoung Joo, Kim, Tae Hyeong, Yoo, Ga Young, Min, Boo Ki, Hwang, Sun Jin
Format: Article
Language:English
Subjects:
Catalysts
Civil Engineering
Disintegration
Efficiency
Engineering
Environmental Engineering
Geotechnical Engineering & Applied Earth Sciences
Industrial Pollution Prevention
Manganese
Ozonation
Ozone
Ozonization
pH effects
Pretreatment
Reduction
Removal
Sewage
Sewage sludge
Sludge
Solid suspensions
Solubilization
Specific energy
Suspended particulate matter
Total suspended solids
Water treatment
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Summary:The effects of ball mill pretreatment and Mn catalytic ozonation on the reduction of sewage sludge were investigated. The ball mill pretreatment increased ΔSCOD from 2,000mg/L to 9,000 mg/L, as Total Solids (TS) increased from 1% to 4% at a specific energy of 75.8 KJ/g-TSS. The increase in disintegration ratio (DR), which is an index of the solubilization of sewage sludge, was consistent with that in TS, at the same specific energy input. With Mn catalytic ozonation treatment, the operational pH was varied from 3 to 6 using HCl at an ozone dose of 0.2 g-O 3 /g-TS; an optimum pH of 3 was determined. At pH 3, the removal efficiency of Total Suspended Solids (TSS) was 45%, the highest value compared with the other pH conditions. The combination of ball mill pretreatment and Mn catalyst ozonation could achieve 60% TSS removal efficiency. The removal efficiency by this combination was about twice as high as the case study of Mn catalyst ozonation treatment alone, without a ball mill pretreatment process.
ISSN:1226-7988
1976-3808
DOI:10.1007/s12205-010-0934-6