Open AccessEvaluation of Step Feeding Strategy in One-Stage Simultaneous Partial Nitritation, Anammox and Denitrification (SPNAD) Process
Author(s) -
Lucky Caesar Direstiyani,
J Kim,
Taewon Kwon,
SoYeon Jeong,
Y Kim,
Jaecheul Yu,
T Lee
Publication year - 2020
Publication title -
iop conference series. earth and environmental science
Language(s) - English
Resource type - Journals
eISSN - 1755-1307
pISSN - 1755-1315
DOI - 10.1088/1755-1315/506/1/012001
Subject(s) - anammox , denitrification , nitrogen , ammonium , acclimatization , chemistry , anaerobic exercise , pulp and paper industry , wastewater , environmental engineering , environmental science , biology , ecology , physiology , denitrifying bacteria , organic chemistry , engineering
Fast start-up of simultaneous partial nitritation, anaerobic ammonium oxidation (anammox) and denitrification (SPNAD) process was achieved within a month by applying step feeding strategy without carbon source addition in the acclimation period. The decreasing cycle number of step feeding strategy successfully improved the SPNAD process performance and enhanced nitrogen and organic removal performance for treating sidestream wastewater. The 3-cycle step feeding strategy obtained higher average values of nitrogen loading rate (NLR), nitrogen removal rate (NRR), ammonium removal rate (ARR) and COD removal rate (CRR) of 0.50, 0.31, 0.45, and 0.18 kg/m 3 /day, respectively, than 10-cycle and 5-cycle step feeding strategy. The step feeding strategy also contributes in maintaining DO, pH and ORP sensors performance stability even after being operated in long-term duration.