TY - JOUR
T1 - Development of a new non-aeration-based sewage treatment technology
T2 - Performance evaluation of a full-scale down-flow hanging sponge reactor employing third-generation sponge carriers
AU - Okubo, Tsutomu
AU - Kubota, Kengo
AU - Yamaguchi, Takashi
AU - Uemura, Shigeki
AU - Harada, Hideki
N1 - Funding Information:
This study was supported in part by research grants from the 1) Japanese Ministry of Education, Culture, Sports, Science and Technology (MEXT), 2) Japan Society for the Promotion of Science (JSPS) and the 3) Science and Technology Research Partnership for Sustainable Development (SATREPS).
Publisher Copyright:
© 2016 Elsevier Ltd.
PY - 2016/10/1
Y1 - 2016/10/1
N2 - A practical-scale down-flow hanging sponge (DHS) reactor using third-generation (G3) sponge carriers was applied for treatment of the effluent from an up-flow anaerobic sludge blanket (UASB) reactor treating municipal sewage. The process performance of the DHS reactor filled with G3 sponge carriers (DHS-G3) was evaluated by conducting an on-site experiment in India over one year. The performance of the DHS-G3 for removal of organic matter and ammonium-nitrogen at a relatively short hydraulic retention time (HRT) of only 0.66 h satisfied the Indian effluent quality standards except for fecal coliform. The removal rate constants for total biochemical oxygen demand (BOD) and fecal coliform determined based on the water quality profiles along the DHS-G3 almost reached equilibrium approximately four months after the start of operation, i.e., 2.45 h-1 for BOD and 2.30 h-1 for fecal coliform, respectively. The oxygen utilization activity of retained sludge was determined to assess the distribution of heterotrophic and autotrophic bacteria along the DHS-G3. Nitrification was promoted in the lower portion of the DHS-G3 reactor in the duration with low organic load, while it decreased when the organic load was increased, probably due to proliferation of heterotrophic bacteria.
AB - A practical-scale down-flow hanging sponge (DHS) reactor using third-generation (G3) sponge carriers was applied for treatment of the effluent from an up-flow anaerobic sludge blanket (UASB) reactor treating municipal sewage. The process performance of the DHS reactor filled with G3 sponge carriers (DHS-G3) was evaluated by conducting an on-site experiment in India over one year. The performance of the DHS-G3 for removal of organic matter and ammonium-nitrogen at a relatively short hydraulic retention time (HRT) of only 0.66 h satisfied the Indian effluent quality standards except for fecal coliform. The removal rate constants for total biochemical oxygen demand (BOD) and fecal coliform determined based on the water quality profiles along the DHS-G3 almost reached equilibrium approximately four months after the start of operation, i.e., 2.45 h-1 for BOD and 2.30 h-1 for fecal coliform, respectively. The oxygen utilization activity of retained sludge was determined to assess the distribution of heterotrophic and autotrophic bacteria along the DHS-G3. Nitrification was promoted in the lower portion of the DHS-G3 reactor in the duration with low organic load, while it decreased when the organic load was increased, probably due to proliferation of heterotrophic bacteria.
KW - Down-flow hanging sponge reactor
KW - Municipal sewage treatment
KW - Oxygen utilization rate
KW - Sponge carrier
KW - Up-flow anaerobic sludge blanket reactor
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U2 - 10.1016/j.watres.2016.06.035
DO - 10.1016/j.watres.2016.06.035
M3 - Article
C2 - 27340815
AN - SCOPUS:84975257614
SN - 0043-1354
VL - 102
SP - 138
EP - 146
JO - Water Research
JF - Water Research
ER -
