Edr Flow Diagram Of Ami Plant

Figure 3 Membrane-stack flow paths

the Township of Imola, has general quality features - and especially micro-biological features - which make traditional disinfecting treatment unnecessary. The system has a limited throughput, but has all the features of a true productive installation. Also, since it was designed as a pilot plant, it has been provided with a data acquisition system on a PC connected to the automatic management PLC of the system; this PLC also acts as a service system for automatic collection of water samples from the three main flows (incoming water, treated water and concentrated brine. The average daily samples or the instant samples picked up from the three flows are then submitted to chemical and chemical/physical analyses at the company Analysis Laboratory. As already mentioned, the system is provided with a management PLC which automatically governs each set-up stage of the machine cycles: polarity reversal of the electric field, valve opening and closing, membrane packet washing phases, additive proportioning, plant alarms and down time, auxiliary utilities, etc.). To follow the stages of the job, the power cabinet is equipped with an overview panel showing the main machine conditions (solenoid valve condition, pump condition, measurements of pressure, temperature, conductivity, etc.).

The same power cabinet also hosts a manual control panel used under non-productive conditions to perform special control manoeuvres, especially in case of unscheduled washing. The PC installed inside the container and connected to the PLC is used not only to acquire data, but also for various programming modifications on the PLC (washing time, polarity reversal time, sampler programming, etc.).

Table 1 Characteristic Data Of The A.M.I. Imola Edr Plant

Container size

L 6050 X W 2430 X H 2800 mm

Potential throughput

24 m3/h of treated water

Installed electric power

20 kW

Membrane stack


Number of treatment stages-lines

Stages No. 2 - lines No. 1

Number of electrodes

4 for each stage (graphite type)

Total no. of cells

+1 0

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