Performance of Modified Chlorine Contact Chamber

Hart, Frederick L.; Vogiatzis, Zinovios

doi:10.1061/jeegav.0001302

Cited by 14 publications

(1 citation statement)

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“…The Morril indices were 3.0 and 3.7 for the CS and the BS, respectively. A larger number for the MDI indicates more mixing in the reactor [41], and these results directly correspond to the longer experimental HRT of the BS condition. The dispersion coefficients (D/uL), which represent the tracer spreading process, were 0.08 for the CS and 0.09 under the BS condition.…”

Section: Tracer Studysupporting

confidence: 58%

A pilot-scale study on a down-flow hanging sponge reactor for septic tank sludge treatment

Machdar

Muhammad

Onodera

et al. 2018

Environmental Engineering Research

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A pilot scale study was conducted on a down-flow hanging sponge (DHS) reactor installed at a sewage treatment plant in Banda Aceh, Indonesia for treatment of desludging septic tank wastewater. Raw wastewater with an average biochemical oxygen demand (BOD) and total suspended solids of 139 mg/L and 191 mg/L, respectively, was pumped into the reactor. Two different hydraulic retention times (HRTs, 3 h and 4 h) were investigated, equivalent to organic loadings of 1.11 and 0.78 kg BOD/m 3 /d, respectively. The average BOD concentration in the final effluent was 46 and 26 mg/L at HRTs of 3 and 4 h, respectively. The concentration of retained sludge along the reactor height was 10.2-18.7 g VSS/L-sponge, and the sludge activities were 0.24-0.32 and 0.04-0.40 mg/g VSS/h for heterotrophs and nitrification, respectively. Values of water hold-up volume, dispersion coefficient, and number of tank in-series found from tracer studies of clean sponge and biomass-loaded sponge confirmed that growth of retained sludge on the sponge module improved hydraulic performance of the reactor. Adoption of the DHS reactor by this Indonesian sewage treatment plant would enhance the role of the current desludging septic tank wastewater treatment system.

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Section: Tracer Studysupporting

confidence: 58%