Dead-end or Direct Microfiltration is a method of filtration which feeds the liquid directly to the microfilter so that all the flow passes through the media.
There is no Crossflow and therefore the feed flow rate equals the filtrate flow rate. Ideally, the filtration module is vertically mounted and is suitable for removal of particulate matter larger than 1 micron.
The technology is based on Exxflow's patented polyester cloth, woven to form a tubular array.

This microfiltration system does not normally need chemical cleaning. An automatic control system initiates the fully automatic cleaning cycle, which is, triggered either by a low level in the feed tank or more often by a run timer.

DEAD -END RE-USABLE FILTER SYSTEM

Plants:- To handle up to 5m3 per hour depending on effluent.
Typical applications:- Phosphating, PCB Scrubbers, Stone cutting, Industrial grinding, Wet powder paint booth waste.

The basic flow regime is as follows: -

• The waste to be treated is transferred from the production area to the feed tank (controlled by L1).
• The waste is pumped from the feed tank into the top of the filtration module (controlled by L2).
• The waste passes through the module into the solids hopper and backfills from the closed solids draw-off valve (SV1).
• A membrane is formed inside the module and clean permeate emerges from the module and falls into the permeate collecting tray attached to the lower module interface.
• Clean permeate passes to the permeate tank, where it is available for re-use or discharge.
• A solids hopper attached to the underside of the permeate tray collects the solids removed during filtration.
• The removed solids build up above the solids draw-off actuator valve (SV1), which opens periodically discharging the solids collected by the filter, into a tank for suitable disposal (controlled by SL).
• The control panel is set up so that the waste flow is used to flush out the solids from the hopper.