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Optimized immobilization of activated sludge in poly(ethylene glycol) gels by UV technology

Paper ID Volume ID Publish Year Pages File Format Full-Text
35002 45067 2010 6 PDF Available
Title
Optimized immobilization of activated sludge in poly(ethylene glycol) gels by UV technology
Abstract

Conventional methods for immobilization of microorganisms in hydrogel are not very efficient and cost-effective. Ultraviolet (UV) technology, a rapid method for hydrogel preparation in ambient environment, was applied to immobilize activated sludge in poly(ethylene glycol) (PEG) gel carriers synthesized from PEG pre-polymer. Conditions for cell immobilization were optimized by selecting suitable UV photoinitiators, crosslinker concentrations, and protection gas. The optimum conditions are the following: 12% PEG pre-polymer with 1% MBA and 0.1% DEAP. More than 90% of ammonia was reduced, and 75% of the total organic compound was removed after treating 40 and 10 mg/L synthetic ammonia wastewater with different C/N ratios in 5 h under aeration conditions. Ammonia degradation increased with increasing C/N ratios, and the scanning electron microscopy images revealed that the immobilized beads had porous structures dominantly filled with nitrifiers. The bioactivity of the immobilized activated sludge was maintained during immobilization by UV technology.

Keywords
UV-polymerization; Opaque sample; Immobilized activated sludge gel bead; Ammonia degradation; Biopolymer; Wastewater treatment
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Optimized immobilization of activated sludge in poly(ethylene glycol) gels by UV technology
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Publisher
Database: Elsevier - ScienceDirect
Journal: Process Biochemistry - Volume 45, Issue 8, August 2010, Pages 1342–1347
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