Nitrogen removal via nitrite in a partial nitrification sequencing batch biofilm reactor treating high strength ammonia wastewater and its greenhouse gas emission.
In present study, the feasibility of partial nitrification (PN) process achievement and its greenhouse gas emission were evaluated in a sequencing batch biofilm reactor (SBBR). After 90days' operation, the average effluent NH4+-N removal efficiency and nitrite accumulation rate of PN-SBBR were high of 98.2% and 87.6%, respectively. Both polysaccharide and protein contents were reduced in loosely bound extracellular polymeric substances (LB-EPS) and tightly bound EPS (TB-EPS) during the achievement of PN-biofilm. Excitation-emission matrix spectra implied that aromatic protein-like, tryptophan protein-like and humic acid-like substances were the main compositions of both kinds of EPS in seed sludge and PN-biofilm. According to typical cycle, the emission rate of CO2had a much higher value than that of N2O, and their total amounts per cycle were 67.7 and 16.5mg, respectively. Free ammonia (FA) played a significant role on the inhibition activity of nitrite-oxidizing bacteria and the occurrence of nitrite accumulation.
School of Resources and Environment, University of Jinan, Jinan 250022, PR China.
Dong
D
Wei
School of Resources and Environment, University of Jinan, Jinan 250022, PR China.
Keyi
K
Zhang
School of Civil and Environmental Engineering, University of Technology Sydney, Broadway, NSW 2007, Australia.
Huu Hao
HH
Ngo
School of Civil and Environmental Engineering, University of Technology Sydney, Broadway, NSW 2007, Australia.
Wenshan
W
Guo
School of Resources and Environment, University of Jinan, Jinan 250022, PR China.
Siyu
S
Wang
School of Resources and Environment, University of Jinan, Jinan 250022, PR China.
Jibin
J
Li
School of Resources and Environment, University of Jinan, Jinan 250022, PR China.
Fei
F
Han
School of Resources and Environment, University of Jinan, Jinan 250022, PR China. Electronic address: dubin61@gmail.com.
Bin
B
Du
Key Laboratory of Chemical Sensing & Analysis in Universities of Shandong, School of Chemistry and Chemical Engineering, University of Jinan, Jinan 250022, PR China.
Qin
Q
Wei
D000641:Ammonia / Q000302:isolation & purification*; D061249:Batch Cell Culture Techniques; D018441:Biofilms; D001704:Biopolymers / Q000032:analysis; D019149:Bioreactors / Q000382:microbiology*; D002245:Carbon Dioxide / Q000032:analysis; D017752:Greenhouse Effect; D006812:Humic Substances; D058465:Nitrification; D009573:Nitrites / Q000378:metabolism*; D009584:Nitrogen / Q000302:isolation & purification*; D009585:Nitrogen Dioxide / Q000032:analysis; D013050:Spectrometry, Fluorescence; D013997:Time Factors; D062065:Wastewater / Q000737:chemistry*; D018508:Water Purification / Q000379:methods*
D000641:Ammonia; D001704:Biopolymers; D002245:Carbon Dioxide; D006812:Humic Substances; D009573:Nitrites; D009584:Nitrogen; D009585:Nitrogen Dioxide; D062065:Wastewater
Excitation-emission matrix (EEM); Extracellular polymeric substances (EPS); Greenhouse gas emission; Partial nitrification; Sequencing batch biofilm reactor