TY - JOUR
T1 - Nitrification performance of high rate nitrifying trickling filters at low ammonia concentrations
T2 - does the aspect ratio matter?
AU - Mai, Lei
AU - Lian, Yu
AU - van den Akker, Ben
AU - Fallowfield, Howard J.
PY - 2019/5/17
Y1 - 2019/5/17
N2 - Nitrifying trickling filters (NTFs) are often introduced to pre-treat waters before chlorination process, to reduce the ammonia-driven chlorine consumption in wastewater treatment. As a passive aerated system, the only power needed is to transport the water to the top of the filter for distribution. Thus, understanding the role of filter aspect ratio on ammonia oxidation might save energy cost. In the present study, a pilot-scale comparison NTF system was conducted on two filters with different aspect ratios (height/diameter) and the same specific surface area. The nitrification efficiencies of these two filters under relatively low influent ammonia-nitrogen concentrations (1.0–4.0 mg NH4-N L−1) were investigated. Results obtained from the present study indicated that the constructional aspect ratio of NTF showed no significant effect on nitrification performance of NTFs. Additionally, the operational parameters showed similar effects on nitrification in NTFs with different aspect ratios. Our findings could provide important information for the construction design of future NTFs.
AB - Nitrifying trickling filters (NTFs) are often introduced to pre-treat waters before chlorination process, to reduce the ammonia-driven chlorine consumption in wastewater treatment. As a passive aerated system, the only power needed is to transport the water to the top of the filter for distribution. Thus, understanding the role of filter aspect ratio on ammonia oxidation might save energy cost. In the present study, a pilot-scale comparison NTF system was conducted on two filters with different aspect ratios (height/diameter) and the same specific surface area. The nitrification efficiencies of these two filters under relatively low influent ammonia-nitrogen concentrations (1.0–4.0 mg NH4-N L−1) were investigated. Results obtained from the present study indicated that the constructional aspect ratio of NTF showed no significant effect on nitrification performance of NTFs. Additionally, the operational parameters showed similar effects on nitrification in NTFs with different aspect ratios. Our findings could provide important information for the construction design of future NTFs.
KW - Ammonia
KW - Aspect ratio
KW - Biomass
KW - Nitrification
KW - Nitrifying trickling filters (NTFs)
KW - Wastewater treatment
UR - http://www.scopus.com/inward/record.url?scp=85066035121&partnerID=8YFLogxK
U2 - 10.1007/s11356-019-05256-1
DO - 10.1007/s11356-019-05256-1
M3 - Article
C2 - 31102227
AN - SCOPUS:85066035121
SN - 0944-1344
VL - 26
SP - 20520
EP - 20529
JO - ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
JF - ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
IS - 20
ER -