The small leachate flow from the Gateshead Borough City Council -United Kingdom municipal industrial waste landfill was running into the Tyne River. The leachate was contaminated with arsenic, mixed heavy metals, and dissolved salts.

By integrating EXXFLOW microfiltration the system removes the arsenic and significant percentage of the metals. One third of the filtrate is treated by reverse osmosis to remove the dissolved salts before the recombined water is discharged to the river. The reverse osmosis reject flow is returned to the EXXFLOW plant for re-treatment.

• Low capital investment and running cost
• Robust treatment requiring minimum operator intervention
• Minimal chemical use
  
  
• Capacity m3/hr (17 gpm)
• 2 duty & 2 standby modules 4m (13') long
• Commissioned - August 1998

The pretreatment is pH correction, the addition of 200 mg/1 of FeC13 and 1 mg/1 Na2S at a pH of 9.0.

The performance of the EXXFLOW are shown below:

Parameter	Units	Feed	Filtrate
Suspended solids	mg/1	11	<1
BOD	mg/1	6	3
Arsenic as As	mg/1	780	0.08
Iron as Fe	mg/1	0.20	None Detected
Lead as Pb	mg/1	0.16	0.12
Nickel as Ni	mg/1	Trace	Trace
Zinc as Zn	mg/1	0.33	0.01
Total Metals	mg/1	8.79	0.20

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Radford Retail - United Kingdom: Manufactures racking & shelving

• Capacity 6 m3/hr
• 3 duty & 3 standby modules 4m long
• Commissioned - September 1996

Basta Hardware - Ireland: Manufactures windows frames

• Capacity 8 m3/hr
• 4 duty & 4 standby modules 3m long
• Commissioned - 1996

B-Mat - Scotland: Manufactures shopping carts

• Capacity 15 m3/hr
• 4 duty & 4 standby modules 8.5m long
• Commissioned- 1996

The washing of glazing machine spindles produces wastewater that contains approximately 20 oz/pint (1200 g/l) of valuable glaze. Exxflow microfiltration separate, thicken and reuse glaze without affecting the quality. The glaze is recovered as a 30oz/pint (1800 g/l) slurry.

Companies manufacturing metal components such as window frames, industrial shelving and racking and shopping carts, create wastewaters containing heavy metals.

EXXFLOW microfiltration efficiently precipitates concentrates and removes metals from the wastewaters.

• Low investment cost
• Reduction in chemical use

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Steelite-International

• Capacity 5-11 m3/hr
• 4 duty & 4 standby modules 2m long
• Commissioned - March 1996

Ainsley China-United Kingdom

• Capacity 1 m3/br
• 1 duty & 1 standby modules 2.5m long
• Commissioned - August 1998

Ceramica De Valdores - Portugal

• Capacity 4 m3/hr
• 4 duty & 4 standby modules 2m long
• Commissioned - December 1998

Corron - Phoenix 'USA, Germany, United 'Kingdom

• Capacity 6 m3/hr
• 3 duty & 3 standby modules 7m long
• Commissioned - December 1998

Northumbria Plating Limited, United 'Kingdom

• Capacity 3.5 m3/hr
• 3 duty & 3 standby modules 7m long
• Commissioned - August 2000

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