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Immobilization of activated sludge in poly(ethylene glycol) by UV technology and its application in micro-polluted wastewater

Paper ID Volume ID Publish Year Pages File Format Full-Text
3968 201 2010 6 PDF Available
Title
Immobilization of activated sludge in poly(ethylene glycol) by UV technology and its application in micro-polluted wastewater
Abstract

A new method, ultraviolet (UV) technology, was utilized to immobilize activated sludge in poly(ethylene glycol) (PEG) gel carriers. A number of characteristics of immobilized cells, such as water content, oxygen uptake rate, and protein content, were examined, and performance in batch culture for treating synthetic micro-polluted wastewater with different C/N ratios and different pH values was also investigated. The bioactivity of immobilized cells was maintained during immobilization and the cells showed high nitrification activity after 10–15 d acclimation. Ammonia removal increased with C/N ratio while TOC removal decreased with it. However, more than 85% of the ammonia nitrogen and 72% of the TOC could be reduced in 4–6 h in all cases. No obvious effects on nitrification were seen for pH shocks at pH 6, 7, 8 or 9, but a pH shock at pH 5 caused a 30% loss of nitrification efficiency. SEM images showed that the immobilization beads were highly porous and that immobilized nitrifiers dominated the surface and within the core of the gel beads.

Keywords
Immobilized cell; Activate sludge; Waste treatment; Aerobic digestion; Microbial; Biopolymers
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Publisher
Database: Elsevier - ScienceDirect
Journal: Biochemical Engineering Journal - Volume 50, Issues 1–2, 15 June 2010, Pages 71–76
Authors
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Subjects
Physical Sciences and Engineering Chemical Engineering Bioengineering
Get Full-Text Now
Don't Miss Today's Special Offer
Price was $35.95
You save - $31
Price after discount Only $4.95
100% Money Back Guarantee
Full-text PDF Download
Online Support
Any Questions? feel free to contact us