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Biowin Procedure (quick start):

Select the “Configure” tab to draw the plant schematic (flowsheet) using a combination of icons for processes, influent, and effluent streams, and connectors (pipes, flow mixers, and flow splitters). Use the pipe tool (last icon on the right of the Configure toolbar) to connect the process elements. Make sure that the pipe flows (arrows) are going in the right direction.

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Specify influent characteristics by double clicking the influent icon and clicking on the “Edit Data” tab in the screen that opens, including flow rate which will be constant for steady-state simulations (change to 100,000m3/d). Keep default parameters for WW Fractions to begin with.

There are two effluent flows from one-sludge biological treatment process line: treated wastewater effluent and waste activated sludge (WAS).

Specify bioreactor tank volume (Dimensions tab) for V = (0.1~0.5) x influent flow rate (in m3/d) and depth = 4 to 5 m. Specify oxygen concentration (Operations tab, DO set point=1.5 – 2 mg/L for most aerobic conditions).

Secondary settler: use “Clarifier –Ideal” icon in the Configure toolbar. Specify secondary settler size (Dimensions tab) with surface area = influent flowrate/surface loading rate (20 to 30 m3/m2/d) and depth = 4 to 5 m.

Specify secondary clarifier underflow rate (U) as a ratio of underflow to overflow rate (O) = (U/O) between 0.5 and 1 (Flow split tab).

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Split the underflow from the secondary clarifier: part goes to waste activated sl 内容过长，仅展示头部和尾部部分文字预览，全文请查看图片预览。 ate concentrations, go to View(Album(Add a page(right click. Select “chart”(select “effluent” ( add it to the panel on the right. In the selected element, add “ammonia N” and “nitrate N” as “state variables” to the panel on the right. Click on “plot selected” and choose pattern, e.g., “fast line”.

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