2021
DOI: 10.17159/wsa/2021.v47.i2.10923
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Parameters to characterize the internal recirculation of an oxidation ditch

Abstract: Mixed liquor circulates ceaselessly in the closed-loop corridor in an oxidation ditch (OD), which is significantly different from other wastewater treatment processes. The internal recirculation ratio (IRR), i.e., the ratio between circulation flow rate (QCC) and influent flow rate (QIn), and the circulatory period (T), i.e. the time consumed for the mixed liquor to complete one lap in the circular corridor, was used to quantify the internal recirculation characteristics of the OD system. In order to elucidate… Show more

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“…Typically, this system consists of a ring, oval or horseshoe-shaped basin through which the wastewater flows. Flow to the oxidation ditch is aerated and mixed with return sludge from a secondary clarifier [134]. A WWTP that uses this process removes around 97-98% of MPFs using the oxidation ditch alone or together with an A 2 O system [52,78,91].…”
Section: Technologies For Microfiber Removal In Wwtpsmentioning
confidence: 99%
“…Typically, this system consists of a ring, oval or horseshoe-shaped basin through which the wastewater flows. Flow to the oxidation ditch is aerated and mixed with return sludge from a secondary clarifier [134]. A WWTP that uses this process removes around 97-98% of MPFs using the oxidation ditch alone or together with an A 2 O system [52,78,91].…”
Section: Technologies For Microfiber Removal In Wwtpsmentioning
confidence: 99%