P.A.S.S. Process

A brief introduction and overview to the PASS process. (Patent Pending)

What is the PASS process: (Particulates. Air. Separation. System).

Particulates: Also includes, some dissolved organics, inorganics, some heavy metals, disease organisms, colloidal material, Colour, Proteins, Algae etc.

Air: Including oxidising gasses like Ozone and Chlorine.

Separation: Removal from the stream.

System: Not a single component, a collection of engineered interconnecting components.

oxidising gasses like Ozone Colour, Proteins, Algae removal from the stream a collection of engineered interconnecting components

What can it do:

PASS can deal with dissolved compounds like Nitrogen’s, large but light particulates and colloidal material and the like are all easily and typically removed with the PASS process.

The primary step of the process uses diffused air or gas, like Ozone, with the resultant rising gas bubbles producing a foam.

It is this foam that provides the continuous separation of the unwanted waste from the treated water stream.

The rising foam can lift out but is not limited to dissolved organics, inorganics, some heavy metals, disease organisms, colloidal material, colour, proteins, Algae etc.

PASS uses no media, screens, barriers or membranes so requires no re-charging, replacement, replenishing or cleaning of media.

PASS removes the unwanted material from the stream as a matter of process and on a continuous basis.

The PASS process is ideally suited to waste water recycling, treatment of sewage mains water for irrigation, treatment of class “C” recycled effluent to class “A” for irrigation.

An addition to the outlet of sewage treatment plants to improve discharge water quality, Leachates for controlled irrigation, Iron and perhaps Manganese removal and other industrial waste water treatments.

PASS is ideal as an “up front” process for other conventional water treatment systems like Reverse Osmosis - marine, brackish or fresh, Nanofiltration, Micro-filtration, Sand filtration, Carbon filtration, Bio filtration and is particularly effective for Aquaculture systems.

uses no media, screens, barriers or membranes conventional water treatment systems particularly effective for aquaculture addition to the outlet of sewage treatment plants

What are the major pieces of equipment:

Flocculating column(s)

Where a floc enhancing agent like Alum Sulphate or similar can be dosed to start a flocculation process. The addition of an oxidising agent is also optional.

Note: Flocculating columns may not be required on all applications.

Oxidiser contact column(s)

To provide mixing and contact/retention time for an oxidising agent like Chlorine or Ozone.

Note: Oxidising columns may not be required on all applications.

Foam Fractionation column.

A specifically designed column with a predicted flow rate and an introduced diffused gas. A collection cone atop the column to facilitate the immediate removal of the produced foam from the stream.

Note: Foam Fractionation is part of every PASS process.

Ozoneation/Chlorination.

Ozoneation as a part of the oxidisation process is ideal, Ozone is usually introduced and diffused into an oxidiser contactor.

Ozone however is not generally regarded as a residual oxidiser and may need to be supplemented or enhanced with a residual oxidiser like Chlorine or similar.

Chlorine is in some cases the oxidiser of choice because of its ease of supply, reliability, predictability and cost of installation.

UV light may also be introduced at or near the tail end of the process for further microbiological control.

There are pumps and possibly break tanks within the process.

pumps and possibly break tanks

Comparisons:

Small foot print by comparison to most conventional methods.

Fraction of the process cost by comparison to most conventional methods.

No media, membranes, screens, barriers or the like.

Waste is completely removed from the stream.

Waste is continuously removed form the stream.

Water wastage is negligible, although variable is typically 50 Litres per hour irrespective of plant through-put volume,

The process itself has no moving parts, it does have pumps and dosing pumps etc as do most other types of water treatment.

The plant itself is vastly less complex, easer to operate, easer to clean and considerable smaller than its competition.

Typical operational cost of a PASS process converting Class "C" effluent to Class "A" is approx 10 cents/1000 Lit

Special note:

PASS is not pitched as an end of line process, in other words PASS is not a replacement for a Sewage treatment plant or municipal water treatment plant or potable water treatment plant, although its addition to the above could be of significan"t benefit in a number of process positions, in many cases.

Although the components used within the PASS process are “standard plant design” the selection and compilation of the components is important. we are always happy to discuss the various combinations and possible arrangements available with the PASS process.

Please feel free to make contact with us anytime, to discuss your needs.

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