TY - JOUR
T1 - Non-submerged attached growth process for domestic wastewater treatment
T2 - Influence of media types and internal recirculation ratios
AU - Dang, Bao-Trong
AU - Nguyen, Thanh-Tin
AU - Bui, Xuan-Thanh
AU - Ngo, Huu Hao
AU - Lin, Kun-Yi Andrew
AU - Tomoaki, Itayama
AU - Saunders, Todd
AU - Huynh, Tan-Nhut
AU - Cao, Thanh Ngoc-Dan
AU - Visvanathan, Chettiyappan
AU - Varjani, Sunita
AU - Rene, Eldon R.
PY - 2022/1
Y1 - 2022/1
N2 - This study is aimed to comprehend the treatment of non-submerged attached growth systems using bio-sponge, bio-cord, and bio-cloth media. Three reactors were set up with internal recirculation ratio of 1 (IR = 1) and similar media surface area. Bio-sponge and bio-cloth reactors showed removal of COD (79 vs. 76%) and NH4+–N (78 vs. 73%). While bio-cord treatment was deteriorated due to time-dependent process. Multiple linear regression revealed that alkalinity governed the formation degree of the anaerobic zone in bio-sponges, partially affecting nitrification. Increasing IR from 1 to 3 caused sloughing of the attached biomass and was positively correlated with effluent nitrite nitrogen concentration, indicating the sensitivity of nitrification to spatial distribution effects. In addition, bio-sponge system obtained superior performance at IR of 2 while bio-cloth one might be also an effective media for wastewater treatment if having good durability. © 2021 Elsevier Ltd.
AB - This study is aimed to comprehend the treatment of non-submerged attached growth systems using bio-sponge, bio-cord, and bio-cloth media. Three reactors were set up with internal recirculation ratio of 1 (IR = 1) and similar media surface area. Bio-sponge and bio-cloth reactors showed removal of COD (79 vs. 76%) and NH4+–N (78 vs. 73%). While bio-cord treatment was deteriorated due to time-dependent process. Multiple linear regression revealed that alkalinity governed the formation degree of the anaerobic zone in bio-sponges, partially affecting nitrification. Increasing IR from 1 to 3 caused sloughing of the attached biomass and was positively correlated with effluent nitrite nitrogen concentration, indicating the sensitivity of nitrification to spatial distribution effects. In addition, bio-sponge system obtained superior performance at IR of 2 while bio-cloth one might be also an effective media for wastewater treatment if having good durability. © 2021 Elsevier Ltd.
KW - Attached growth
KW - Domestic wastewater
KW - Down-flow hanging media
KW - Multiple linear regression
KW - Nitrite accumulation
UR - http://www.scopus.com/inward/record.url?scp=85117168540&partnerID=8YFLogxK
UR - https://www.scopus.com/record/pubmetrics.uri?eid=2-s2.0-85117168540&origin=recordpage
U2 - 10.1016/j.biortech.2021.126125
DO - 10.1016/j.biortech.2021.126125
M3 - RGC 21 - Publication in refereed journal
C2 - 34653623
SN - 0960-8524
VL - 343
JO - Bioresource Technology
JF - Bioresource Technology
M1 - 126125
ER -
