Open AccessImpact of influent ammonia concentration on partial nitrification of biological sand filter and kinetics
Author(s) -
Jiao Chen,
Yixin Lü,
Luo X,
Yangtao Li,
Li Tang
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 - 10.1088/1755-1315/450/1/012073
Subject(s) - nitrification , effluent , ammonia , filter (signal processing) , chemistry , anaerobic filter , sand filter , environmental engineering , kinetics , environmental chemistry , environmental science , pulp and paper industry , nitrogen , wastewater , anaerobic digestion , physics , organic chemistry , quantum mechanics , methane , computer science , engineering , computer vision
The impact of influent NH 4 + /-N concentration on partial nitrification performance was investigated in a biological sand filter. The removal kinetics model of NH 4 + -N in partial nitrification-sand filter was established and its accuracy was verified. The results showed that the NH 4 + -N removal rates and NO 2 − -N accumulation rates stabled at about 60% and 94% respectively and the effluent NO 2 − -N/NH 4 + -N ratios were 1.20~1.39 when the hydraulic load was 1.0 m/d and the influent NH 4 + -N concentration was 45~50 mg/L, indicating that the sand filter had good partial nitrification effect, and the effluent quality basically met the theoretical influent demand of anaerobic ammonia oxidation. The kinetic model of NH 4 + /-N removal in sand filter could be described as S h / S 0 =exp(-1.0033 S 0 −1.1337 h ) when the influent NH 4 + -N concentration was 10.2~61.3 mg/L. The model had high accuracy and could provide scientific guidance for effluent quality prediction and optimization design.