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OTRs increased in proportion to influent load, and the OTR value was Vr > V > H.
The results indicated that the running period was more closely related to influent ammonia concentration than influent COD concentration.
At hydraulic retention time of 8 h, the orthophosphate concentration in effluent was 84% higher compared to influent.
The method was applied to influent wastewater samples collected from 17 different wastewater treatment plants throughout Belgium.
The insights from the performed fouling experiments can be used to optimize system operation with respect to influent dynamics.
The porosity reduction is sensitive to influent concentrations of HCO3−, Ca2+, CO32−, and dissolved oxygen, the anaerobic iron corrosion rate, and the rates of CaCO3 and FeCO3 formation.
Similar(36)
Ferrous sulfate heptahydrate was added to the influent to increase the Fe concentration by 3.6 mg/L, and EDTA (10 mg/L) was added to prevent Fe precipitation.
Experiments showed a higher COD removal efficiency (93%) and oxidation efficiency (62%) when two-staged Fenton reaction with inner circulation (flow-to-influent ratio of 5) was applied, whereas only 40.9% of COD reduction was obtained when using the single-staged Fenton without any circulation.
Ferrous sulfate heptahydrate was added to the influent to increase the iron concentration by 3.6 mg/L and ethylene diamine tetra-acetic acid was added to the influent at 10 mg/L to prevent iron precipitation.
After day 219 (Run 2), the quantity of supplemented chemicals to the influent was increased to increase VNR and VNL (Fig. 2c).
The control system is an algorithm that automatically adjusts the cycle length to the influent wastewater characteristics according to the end points.
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