Removal of nitrogen in wastewater by polyvinyl alcohol (PVA)-immobilization of effective microorganisms

Title
Removal of nitrogen in wastewater by polyvinyl alcohol (PVA)-immobilization of effective microorganisms
Author(s)
이진태조무환
Keywords
NUTRIENT REMOVAL; AMMONIUM; DENITRIFICATION; NITRIFICATION; BIOREACTOR; BEADS; RATIO
Issue Date
201001
Publisher
SPRINGER
Citation
KOREAN JOURNAL OF CHEMICAL ENGINEERING, v.27, no.1, pp.193 - 197
Abstract
To remove nitrogen and carbon simultaneously from municipal wastewater, a mixture of effective microorganisms (EM) was immobilized in polyvinyl alcohol (PVA) hydrogel beads. The modified PVA beads with calcium alginate show characteristic pores and mechanical stability and flexibility. The EM-immobilized PVA system was established in a 3 L sequential batch reactor (SBR) with a synthetic wastewater and operated at an HRT of 12 h with COD loading rate of 0.5-2.4 g COD/L center dot d. In this system, intermittent aeration is more efficient than continuous aeration, and removal rates of COD and total nitrogen (T-N) were increased as the feed COD/N ratio was increased from 1.9 to 5.6. At an optimal condition, 73% of total nitrogen and 93% of COD were stably removed at a COD loading rate lower than 2.4 g COD/L center dot d and at 3: 1 ratio of aerobic time to anoxic time.
URI
http://hdl.handle.net/YU.REPOSITORY/22988http://dx.doi.org/10.1007/s11814-009-0330-4
ISSN
0256-1115
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공과대학 > 화학공학부 > Articles
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