PermaDos
Automatic, continuous preparation of the potassium permanganate solution from the powdered product, with continuously measured concentration and no dust dispersion.
PermaDos →
Production, dosing and measurement
Permanganate
Three complementary systems for the entire permanganate oxidation process: PermaDos prepares the potassium permanganate solution from the powdered product, PDS doses liquid solutions of sodium or potassium permanganate in proportion to the flow rate, PermaTest continuously measures the residual permanganate.
- PermaDos: preparation from 400 to 3,000 l/h
- PDS: dosing in mg/l proportional to the flow rate
- PermaTest: residual analysis in 30 seconds
- Modbus TCP/IP on all systems
400 – 3,000l/hSolution prepared by PermaDos
1 – 50g/lSolution concentration
30sResidual analysis with PermaTest
0.001mg/lPermaTest sensitivity
The process
Prepare, dose, measure
Permanganate is used mainly as a pre-oxidant in drinking water: it reduces organic substances and trihalomethane precursors, oxidises iron and manganese, and removes algae and hydrogen sulphide. Controlling the residual prevents overdosing, which causes a pinkish colouring of the water and the formation of by-products, and underdosing, which reduces the effectiveness of the treatment.
PDS
Continuous dosing of sodium or potassium permanganate from liquid solutions, in mg/l and in proportion to the flow rate of the treated water.
PDS → PermaTest
Continuous measurement of the residual permanganate at the significant points of the process, with 4–20 mA outputs and Modbus TCP/IP for dosing control.
PermaTest →
Sodium or potassium
Potassium or sodium permanganate
Both compounds are selective oxidants for iron, manganese and other contaminants, in municipal and industrial plants.
Potassium permanganate (KMnO4)
For the removal of iron and manganese, the oxidation of hydrogen sulphide (H2S), the control of odours and organic compounds and pre-oxidation in drinking water treatment. A chemically stable solution, less aggressive towards certain materials and with a good shelf life. It can be produced and dosed starting from the powder (PermaDos), or a liquid solution can be dosed (PDS).
Sodium permanganate (NaMnO4)
For industrial water, environmental remediation and contaminated soil, and the oxidation of complex organic compounds. Its much higher solubility allows higher concentrations; the solution is more fluid, easier to pump and more reactive, and is therefore suited to continuous dosing plants (PDS).
PermaDos – preparation
PermaDos: continuous preparation in four stages
A compact, fully automatic unit that prepares ready-to-use potassium permanganate solutions from the powdered product, controlling concentration, flow rate and levels.
Mixing
Dosing and homogenisation of the powder with the preparation water.
Maturation
Reaction and stabilisation of the solution.
Storage
Controlled storage until use.
Withdrawal
Regular delivery of the solution to the dosing pumps of the skid.
PermaDos – components
Components of the PermaDos unit
Powder feeder
35-litre polypropylene hopper (about 60 kg of permanganate) with vibrator and level control; stainless steel screw with non-stick coating, constant-torque brushless motor, PID control; access to the screw only with the machine stopped.
Preparation water
Manual regulating and shut-off valve, solenoid valve, flow indicator and electronic flow meter.
Tank and mixer
Moulded HDPE tank with safety cover, mixer with constant-torque brushless motor, ultrasonic sensors for low, high and maximum level.
Concentration analyser
KMnO4 concentration probe in g/l for controlling the preparation.
Control panel
ABS IP65 cabinet, colour touch HMI, management of 2 dosing pumps, Modbus Ethernet TCP/IP.
Dosing skid
On request, the unit is completed by a skid with 2 diaphragm dosing pumps for the injection of the prepared solution.
Dosing skid →
PermaDos – dosing skid
Preparation and dosing in a single supply
The PermaDos can be integrated with a dosing skid that draws the solution from the storage tank and injects it into the line to be treated. The skid is sized according to the plant flow rate and the required dose and is managed directly from the PermaDos control panel: preparation and dosing thus form a single system, with a single point of control and supervision.
Two dosing pumps
Skid with 2 diaphragm dosing pumps of the Prisma or Prius D series, selected according to the requirements of the plant, with automatic flow rate adjustment.
Management from the control panel
The pumps are controlled from the PermaDos touch HMI, which manages their operation, adjustment and alarms; Ethernet Modbus TCP/IP communication makes the data available to the plant supervision system.
CB and SE configurations
The skid is available for both versions of the PermaDos, with a 1,000 kg IBC or with a safety box for 25 kg buckets, as shown in the installation diagrams.
Diagrams →
PermaDos – models
PermaDos CB and PermaDos SE
PermaDos CB
For Free Flowing permanganate in 1,000 kg IBCs: AISI 304 support with load cells for measuring the remaining product; skid with 2 dosing pumps chosen according to the plant.
PermaDos SE
For technical-grade or Free Flowing permanganate in 25 kg buckets: HDPE safety Box with manual 180° rotation, gradual emptying without dust dispersion, window with magnetic lock.
Installation
Feed water pressure 2 – 4 bar; HDPE Box operating temperature from +5 to +40 °C.
PermaDos – diagrams
PermaDos diagrams
PermaDos CB with IBC and dosing skid
PermaDos SE with safety box and dosing skid
PDS – dosing
PDS: accurate, proportional dosing
A compact, fully automatic system for the continuous dosing of liquid sodium or potassium permanganate solutions, for drinking water and industrial applications. Dosing proportional to the flow rate prevents overdosing and underdosing.
Volumetric dosing
The permanganate dose is set in mg/l; dosing is automatically adjusted to the flow rate.
Proportional dosing
Proportional to the 4–20 mA flow signal, or with PID control from the integrated ultrasonic flow meter.
Manual dosing
Manual mode with a set flow rate; remote start and stop command.
Pump control
Automatic calibration and PID control of the stepper motor diaphragm pumps, with PVDF pump head and Modbus.
PDS – panel
PDS panel, flow meter and HMI
Instrumentation panel
Ultrasonic flow meter
Measurement of the water flow rate for proportional dosing.
HMI screen
Flow rate, set dose and pump status on the 7" touch panel.
PermaTest – measurement
PermaTest: residual measurement in automatic cycles
A compact analyser for the continuous measurement of residual permanganate (MnO4−) in drinking or industrial water. The residual is checked at the significant points of the process: pre-oxidation, sedimentation inlet and outlet, filtration outlet.
Sampling
Programmable sequence on two sampling lines.
Conditioning
A peristaltic pump adds acid or buffer solution to stabilise the sample.
Measurement
The electrochemical cell with selective electrode measures the permanganate in about 30 seconds.
Outputs
The value is stored and transmitted to the 4–20 mA outputs and via Modbus TCP/IP; management of the general alarm and thresholds.
Also suitable for turbid water or water with a high manganese dioxide content, for ultrapure water and for seawater, without the need for recalibration.
PermaTest – controller
PermaTest features
Panel
Compact design, for bench or wall mounting, with colour touch display, stepper motor peristaltic pumps and pinch solenoid valves.
Selective electrodes
Electrochemical cell with permanganate-selective electrode and glass body.
Screen
Process timers, automatic two-point calibration, configuration of outputs and alarms.
PermaTest – diagram
PermaTest instrumentation panel
Technical data
Data sheets
PermaDos
| PermaDos | |
|---|---|
| Solution output | 400 – 1,000, 2,000 or 3,000 l/h |
| Concentration | 1 – 50 g/l, measured by probe |
| Feed water pressure | 2 – 4 bar |
| Operating pressure | According to the dosing pumps |
| Power supply | 230 VAC 50 Hz or 24 VDC |
| Power consumption | 600 W or 1,200 W depending on the model |
| Tank | HDPE, 1,400 × 1,400 × 1,200 mm |
| Interface | 7" touch HMI (IP65) |
| Communication | Ethernet Modbus TCP/IP |
| Control | Automatic proportional; continuous or PWM from the concentration probe; manual; PID; 4–20 mA signal |
| Alarms | High and low concentration, preparation water flow rate, solution levels, emergency stop |
PDS
| PDS | |
|---|---|
| Power supply | 230 VAC ±10%, 50/60 Hz |
| Power consumption | About 100 W |
| Protection | IP65 (NEMA 4) |
| Display | 7" touch HMI |
| Inputs | 4–20 mA flow, remote start/stop, level alarm |
| Operating temperature | 0 – 40 °C |
| Installation | Floor-standing |
| Communication | Ethernet Modbus TCP/IP |
| Safety | Reagent level sensor with automatic dosing shutdown |
PermaTest
| PermaTest | |
|---|---|
| Measuring range | 0.000 – 10.000 ppm (electrode); 0.000 – 5.000 ppm on the outputs |
| Sensitivity | 0.001 mg/l |
| Accuracy | ± 1% of full scale |
| Repeatability | 2% |
| Drift | < 2% per month |
| Sample pH | 2 – 10 |
| Analysis time | About 30 seconds |
| Analogue outputs | 2 × isolated 4–20 mA (maximum 500 Ω) |
| Digital inputs / outputs | 1 input (sampling via probe), 1 general alarm output |
| Display | 4" colour touch screen |
| Communication | Ethernet Modbus TCP/IP |
| Power supply | 100 – 230 VAC ±10%, 50/60 Hz, 150 VA |
| Protection | IP55 |
| Operating temperature | 0 – 40 °C |
| Dimensions and weight | 655 × 630 × 330 mm, about 5 kg |
| Materials | PP, PMMA, aluminium; peristaltic tube |
Applications
- Drinking water treatment
- Groundwater
- Iron and manganese
- Organic substances
- Odours
- Industry
- Environmental remediation
- Wastewater
Installations
Installation examples
Systems are supplied pre-assembled and tested, in the form best suited to the plant room: on a panel, in a cabinet or on a skid (with cover, in a box or on a frame), also tailor-made. Some examples.
On a panel
Controller, pumps, probe holder and accessories mounted and wired on a wall panel.
In a cabinet
System panel and chemical tanks housed in a single cabinet.
Wall cabinet
Pipework, pumps and electrical panel in a wall cabinet with door.
Skid with cover
Skid with raised stainless steel frame and protective PMMA cover.
Skid in a box
Skid enclosed in a box with door, with the chemical tanks at the base.
Skid on a frame
Skid on a frame with doors, pre-assembled and ready for connection.
On the tank
Dosing pump mounted directly on the tank: the most compact solution.
In the plant room
Wall installation in the plant room, with the chemical tanks on the floor.
Pumps, controllers or components supplied by the customer can also be fitted, with custom dimensions, back panel and electrical panel. Dosing stations and skids →
Plant sizing
Tell us the water flow rate to be treated, the required dose and the form in which the permanganate is supplied (powder or solution): we will propose the most suitable preparation or dosing system, pumps and residual control.