breaking up the activated sludge into small flakes; introducing an oxygen-containing gas in fine distribution into the resulting finely divided suspension; and, after the oxygen has been at least partially consumed, recoagulating the finely divided suspension in a potential flow to form settlable fl...
Parameters for Activated Sludge Calculations The aeration tank/secondary clarifier flow diagram at the left shows some of the parameters used for activated sludge design and operational calculations. The parameters shown in the diagram, plus some more, are described with U.S. and S.I. units in t...
[1]. The basic activated sludge processes include plug-flow, complete-mix andsequencing batch reactorprocesses. Nowadays, a number of activated sludge processes employing these basic processes have evolved inwastewater treatment. However, increasingly stringent requirements regarding effluent quality call ...
The peristaltic pump has a flow rate of 400 mL min−1, ensuring that the sludge suspension is transferred from the reactor to the pressing component in less than 3 s in a uniformly mixed state. The electromagnetic valve dispenses 28 μL per drop, with an interval of 300 s between ...
These include a flow rate (Q) of 1.8 m3/h to give a hydraulic retention time (HRT) of 11.1 h, bulk liquid temperature of 26 °C, DO concentration within the bulk liquid of the HySAF reactor of 2.5 mg/L for model calibration. The activated sludge waste (WAS) rate was set to 2.2 ...
Aksu Z, Gönen F (2004) Biosorption of phenol by immobilized activated sludge in a continuous packed bed: prediction of breakthrough curves. Proc Biochem 39:599–613 Article Google Scholar Anisuzzaman S, Bono A, Krishnaiah D, Tan YZ (2016) A study on dynamic simulation of phenol adsorpt...
Microbial morphology, such as filamentous growth, has a large impact on wastewater treatment efficiency, as specific populations are essential for flocculation, settling, and dewatering in AS, but overgrowth can lead to problems in sludge settleability (bulking) and foaming41. This leads to solids ...
This barrier was set to slow down and adjust the wastewater flow into the center of the basin as well as reduce water turbulence. Startup of the activated sludge culture The bench scale units were started using 300-g wet AS each, collected from the aerated basin of the AS unit at ...
Peaks at the wave number of 599 cm−1 may indicate the presence of phosphates, which were present in the activated sludge and leachate [[83], [84], [85]]. However, this peak is also characteristic of the S–O bond and may indicate the presence of inorganic sulfates [82]. It can ...
(ZnCl2), and 2 mL of deionized water. After that, the samples were dried for 12 h. The dried powder sample was transferred to a quartz reactor. The reactor was coupled in the oven under N2atmosphere at a flow rate of 0.25 L min−1. A heating ramp of 283.15 K ...