Tenselo WTR-015 connects the iron, manganese and hydrogen-sulphide load to a preliminary catalytic-media filter duty. It checks the service velocity, bed and backwash requirements before a supplier model is chosen.
Water analysis and operating inputs
Enter the peak flow and the measured iron, manganese and hydrogen sulphide concentrations. Add the target free-chlorine residual, chlorine product strength and daily operating hours. The calculation uses the water-quality load and the selected operating condition to assess service velocity, vessel count, media volume, oxidant demand and backwash duty.
Worked DMI-65 example
This WTR-015 example uses a 200 L/min bore with iron at 4.9 mg/L, manganese at 0.9 mg/L and hydrogen sulphide at 0.3 mg/L.
| Output | Calculated value |
|---|---|
| Filter vessel | One 63 × 86 inch vessel |
| DMI-65 media | 2,100 L |
| Chlorine dose | 5.44 mg/L |
| 12.5% sodium hypochlorite | 12.52 L/day |
| Metering-pump duty | 0.52 L/h |
Result: the example establishes a preliminary filter and dosing duty. It does not approve the media for the site or confirm the treated-water quality.
Service and backwash hydraulics
The current DMI-65 technical data relates service velocity to the iron and manganese concentration, pH, required residual and plant duty. It also relates backwash velocity to bed depth and calls for adequate freeboard and bed expansion. WTR-015 uses these constraints to prevent a high-manganese source from being sized only on the easier iron-removal duty.
Review the current DMI-65 technical data and run a pilot or proof test where the application warrants it.
Place the iron-removal stage in the treatment train
Confirm oxidation and contact time before the media, and ensure the backwash supply can fluidise the selected bed. Check pH, turbidity and the complete water matrix. If RO follows, verify residual oxidant control and membrane compatibility.
Use water-analysis interpretation first, then continue to treatment-process selection or RO design.
Questions
What causes orange or brown staining in bore water?
Iron commonly produces orange or brown staining, while manganese can produce dark staining or deposits. A laboratory analysis is required because colour and smell alone do not identify the concentration or complete water matrix.
What inputs are needed for DMI-65 filter sizing?
Use the peak flow, iron, manganese and hydrogen-sulphide results, pH, target oxidant residual, chlorine product strength and operating hours. Backwash supply and available pressure also need checking.
Can DMI-65 remove both iron and manganese?
DMI-65 is used for iron and manganese removal, but the suitable service velocity, pH, oxidation and bed arrangement depend on the measured water quality. Confirm the design against current technical data and site testing.
Does the calculator select a final iron-removal system?
It provides a preliminary vessel, media, dose, pump and backwash duty. A specialist and supplier must verify the complete process and treated-water target.