# Calculation of the Common Characteristics of a Complete-Mix Activated-Sludge System with Recycle

Related Calculators Overviews

## Calculation of the Common Characteristics of a Complete-Mix Activated-Sludge System with Recycle

This online calculator gives an impression of some common characteristics for modelling a simple suspended growth process. The process will take place after a primary sedimentation and follows two stages: it will pass an aeration tank and a clarifier. Commonly some settled sludge from the clarifier will returned into the aeration tank to keep the process activated. To help you picturing it, you could visit the page with more information about the Activated-Sludge Process.

To use this calculator please fill in the input value data of your sewer wastewater and as a result some basic plant design and effluent BOD data will follow out of the calculations. If the normal sewer water characteristics are unknown, please press the "typical data" button for an auto fill of the input fields.
Under Related Calculators in the menu besides, you can find separated calculations of the results computed on this page. On the pages of these related calculations, there's some theory about the calculation.

Hover your cursor over the descriptions of the Kinetic Coefficients or Characteristics of Complete-Mix Suspended Growth Process and click on the link for more information.

Characteristics of Primary Sedimentation Effluent wastewater flowrate Q = m3/d S0 = BOD or bsCOD g/m3 X0,i = g/m3 or mg/l iTSS = g/m3 XT = g/m3 or mg/l SRT = d k = g COD/g·d Y = g VSS/g COD used kd = g VSS/g VSS·d Ks = g COD/m3 fd = g VSS/g VSS VSS/TSS =
Characteristics of Complete-Mix Suspended Growth Process effluent soluble substrate concentration (bsCOD) S = g bsCOD/m3 t = d PX,T,VSS = kg VSS/d PX,T,TSS = kg TSS/d X/XT = kg/d Yobs,VSS = g VSS/g bsCOD Yobs,TSS = g TSS/g bsCOD R0 = kg/d

Lenntech BV
Distributieweg 3
2645 EG Delfgauw

tel: +31 152 610 900
fax: +31 152 616 289
e-mail: info@lenntech.com