TY - JOUR
T1 - Assessment of UASB–DHS technology for sewage treatment
T2 - a comparative study from a sustainability perspective
AU - Maharjan, Namita
AU - Nomoto, Naoki
AU - Tagawa, Tadashi
AU - Okubo, Tsutomu
AU - Uemura, Shigeki
AU - Khalil, Nadeem
AU - Hatamoto, Masashi
AU - Yamaguchi, Takashi
AU - Harada, Hideki
N1 - Funding Information:
The authors wish to thank the support and cooperation extended by the National River Conservation Directorate, Ministry of Environment, Forest and Climate Change, Government of India and different state agencies controlling the Sewage Treatment Plants under this study and also Tsuyoshi Danshita, Choo-laka Hewawasam, Tomohiro Kobayashi, Kenichi Sakamoto of Aqua and Soil laboratory for assisting with the laboratory works.
Funding Information:
This research was supported by research grants from the Ministry of Education, Culture, Sports, Science and Technology, Japan Society for the Promotion of Science and Science and Technology Research Partnership for Sustainable Development.
Funding Information:
This research was supported by research grants from the Ministry of Education, Culture, Sports, Science and Technology, Japan Society for the Promotion of Science and Science and Technology Research Partnership for Sustainable Development. The authors wish to thank the support and cooperation extended by the National River Conservation Directorate, Ministry of Environment, Forest and Climate Change, Government of India and different state agencies controlling the Sewage Treatment Plants under this study and also Tsuyoshi Danshita, Choolaka Hewawasam, Tomohiro Kobayashi, Kenichi Sakamoto of Aqua and Soil laboratory for assisting with the laboratory works.
Publisher Copyright:
© 2018, © 2018 Informa UK Limited, trading as Taylor & Francis Group.
PY - 2019/9/19
Y1 - 2019/9/19
N2 - This paper assesses the technical and economic sustainability of a combined system of an up-flow anaerobic sludge blanket (UASB)–down-flow hanging sponge (DHS) for sewage treatment. Additionally, this study compares UASB–DHS with current technologies in India like trickling filters (TF), sequencing batch reactor (SBR), moving bed biofilm reactor (MBBR), and other combinations of UASB with post-treatment systems such as final polishing ponds (FPU) and extended aeration sludge process (EASP). The sustainability of the sewage treatment plants (STPs) was evaluated using a composite indicator, which incorporated environmental, societal, and economic dimensions. In case of the individual sustainability indicator study, the results showed that UASB-FPU was the most economically sustainable system with a score of 0.512 and aeration systems such as MBBR, EASP, and SBR were environmentally sustainable, whereas UASB–DHS system was socially sustainable. However, the overall comparative analysis indicated that the UASB–DHS system scored the highest value of 2.619 on the global sustainability indicator followed by EASP and MBBR with scores of 2.322 and 2.279, respectively. The highlight of this study was that the most environmentally sustainable treatment plants were not economically and socially sustainable. Moreover, sensitivity analysis showed that five out of the seven scenarios tested, the UASB–DHS system showed good results amongst the treatment system.
AB - This paper assesses the technical and economic sustainability of a combined system of an up-flow anaerobic sludge blanket (UASB)–down-flow hanging sponge (DHS) for sewage treatment. Additionally, this study compares UASB–DHS with current technologies in India like trickling filters (TF), sequencing batch reactor (SBR), moving bed biofilm reactor (MBBR), and other combinations of UASB with post-treatment systems such as final polishing ponds (FPU) and extended aeration sludge process (EASP). The sustainability of the sewage treatment plants (STPs) was evaluated using a composite indicator, which incorporated environmental, societal, and economic dimensions. In case of the individual sustainability indicator study, the results showed that UASB-FPU was the most economically sustainable system with a score of 0.512 and aeration systems such as MBBR, EASP, and SBR were environmentally sustainable, whereas UASB–DHS system was socially sustainable. However, the overall comparative analysis indicated that the UASB–DHS system scored the highest value of 2.619 on the global sustainability indicator followed by EASP and MBBR with scores of 2.322 and 2.279, respectively. The highlight of this study was that the most environmentally sustainable treatment plants were not economically and socially sustainable. Moreover, sensitivity analysis showed that five out of the seven scenarios tested, the UASB–DHS system showed good results amongst the treatment system.
KW - Composite indicator
KW - India
KW - UASB–DHS
KW - sewage treatment plants
KW - sustainability
UR - http://www.scopus.com/inward/record.url?scp=85045052666&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=85045052666&partnerID=8YFLogxK
U2 - 10.1080/09593330.2018.1455746
DO - 10.1080/09593330.2018.1455746
M3 - Article
AN - SCOPUS:85045052666
SN - 0959-3330
VL - 40
SP - 2825
EP - 2832
JO - Environmental Technology (United Kingdom)
JF - Environmental Technology (United Kingdom)
IS - 21
ER -