Comparative performance of air-lift partial nitritation processes with attached growth and suspended growth without biomass retention

Title
Comparative performance of air-lift partial nitritation processes with attached growth and suspended growth without biomass retention
Author(s)
안영호최정동
Keywords
ANAEROBIC AMMONIUM OXIDATION; AUTOTROPHIC NITROGEN-REMOVAL; SLUDGE DIGESTER LIQUIDS; RICH WASTE-WATER; ANAMMOX PROCESS; LANDFILL LEACHATE; PILOT-PLANT; BED REACTOR; NITRIFICATION; DENITRIFICATION
Issue Date
201406
Publisher
TAYLOR & FRANCIS LTD
Citation
ENVIRONMENTAL TECHNOLOGY, v.35, no.11, pp.1328 - 1337
Abstract
Partial nitritation is an essential first step in anaerobic ammonium oxidation. This study compared the performance of air-lift partial nitritation reactors with attached growth (AG) and suspended growth (SG) without biomass retention using ammonium-rich recirculated liquor produced from the dewatering of anaerobically digested sludge. The steady-state results showed that the AG can effectively retain ammonium-oxidizing bacteria (AOB) with high activity and allow minimizing biomass discharge (approximate to 10mg volatile suspended solids/L) in the effluent. The nitrogen loading (based on the total reactor volume) satisfying the effluent characteristics could be suggested to be 0.42g N/L/d for the SG, and 0.76g N/L/d for the AG, respectively. Compared with the SG, the AG achieved a higher ammonium loading rate (approximate to 1.8 times), maximal ammonium oxidation activity (48mg N/L-h based on liquid-phase volume) under a short hydraulic retention time (HRT) and a long solids retention time (SRT>80 d). The overall performance confirmed that AG is a promising configuration for partial nitritation in terms of the process stability, maximization of the AOB activity and minimization of the effluent biomass under a short HRT and high nitrogen loading rate.
URI
http://hdl.handle.net/YU.REPOSITORY/32076http://dx.doi.org/10.1080/09593330.2013.868037
ISSN
0959-3330
Appears in Collections:
공과대학 > 건설시스템공학과 > Articles
Files in This Item:
There are no files associated with this item.
Export
RIS (EndNote)
XLS (Excel)
XML


qrcode

Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.

BROWSE