Manchester Integrated CMP
Wastewater Recycling System (Typical)

The Manchester Integrated CMP Wastewater Recycling System is designed for the removal of total suspended solids (TSS) and dissolved copper from process wastewater and generates a suitable feed supply for water recycling. The integrated system is designed for continuous operation with automatic solids removal.

High velocity cross-flow tubular microfiltration technology is used as the primary system for the wastewater recycling process. The tubular MF process will reject and remove solids down to the 0.1 microns or better with the use of polypropylene semi-permeable microfilter membrane elements.

Suspended solids are continuously removed from the microfiltration system using dual automatic self-cleaning liquid/solid centrifuges. The solids are ejected automatically from the centrifuges as a dewatered solid mass capable of meeting TCLP requirements for landfill purposes.

Dissolved copper ions are removed by selective ion exchange. The IX columns are regenerated on a mass demand basis using specific metal ion detectors to optimize the metal binding capacity of the ion exchange resin. The first four bed volumes of the concentrated copper sulfate IX regenerant stream is directed to an electrowinning cell for the production of copper metallic sheets for resale. The clipped tails of the IX regenerant are directed to a tails tank for reprocessing through the copper selective IX. Eighty percent of the electrowon solution is reused to strip the next IX column. The balance is reprocessed through the IX system for copper recovery.

The IX effluent is then directed to the HPR Reverse Osmosis system where the waters are desalinated to less than 1-2 grains. A percentage of the reject brine stream is recycled to the suction side of the high-pressure multistage pump to maximize water-recycling efforts. The remaining balance of the reject brine is directed to the Acid Waste Neutralization System for discharge to the sewer drain.

The RO permeate stream is then directed to a Dual Bed DI system followed by a Mixed Bed DI system for reuse at 18 meg-ohms of resistivity.

The integrated system includes process instrumentation for monitoring turbidity and TOC equipped with divert valves and audible alarm conditions. Advanced control systems provide touch screen displays for process trending analysis, tank level inventory, remote modem monitoring and preventative maintenance programs.

Some of the most advantageous benefits associated with the Manchester integrated CMP wastewater recycling system include:

1. Non-chemical water recycling process.
2. Enhanced membrane flux rates for extended periods of MF system operation.
3. Reduced loading and wear on the MF system’s internal surfaces due to the significantly reduced concentration of solids in the retentate stream at all times.
4. Automatic removal of solids for over 90% of the TSS present in the waste stream.
5. Solids are automatically removed as a dewatered mass, thus reducing operator attention.
6. No expendable media is used in the system reducing operator attention and cost of operation.
7. No use of a DE precoat and body feed to a filter press, which is becoming a restrictive solid waste for landfills.
8. Improved system performance.

The entire wastewater recycling process is a non-chemical treatment approach to minimize foreign chemical contamination of the UPW feed water supply stream. All concentrated brine is directed to the existing acid waste neutralization system for discharge to the sewer drain meeting compliance standards for TSS.

Manchester has completed approximately 900 systems addressing various water and air contaminants with varying discharge limits. We have completed systems with flows varying from a few gallons per minute up to 3000 gallons per minute (4.3 MGD) and air pollution control systems for exhaust rates up to 100,000 SCFM. Water systems have been furnished for arsenic and various metal removals, cyanide destruction, chrome reduction, various organics, in addition to phosphates, fluorides and recycling systems with economic payback of less than one year.

Manchester is one of the leading concerns specializing in the turnkey design and installation of wastewater treatment and air pollution control systems. We have been in business since 1976 and are one of the few organizations that bring air and water technologies together, examining the economic points for air, exhaust and make?up rates, heat recovery and water recycling systems, etc.

We have also recently completed a system for Mitsubishi Semiconductor America that won the top award for the EPA Region IV where we recycled in excess of 75% of their wastewater to a quality of 3-5 megohm. We originally installed their 350 GPM wastewater system, which consistently gave very low metal discharges as well as very low fluoride levels. Many of our present customers are repeat customers.

Manchester applies the best technology to suit the customer’s effluent requirements at a cost consistent with the automation and discharge limits required.

CMP WASTEWATER TREATMENT

· BATCH
· CONTINUOUS
· NO EXPENDABLE FILTER MEDIA
· AUTOMATED SLUDGE DEWATERING

CMP WASTEWATER RECYCLING

· CROSS FLOW ULTRAFILTRATION
· AUTOMATED SLUDGE DEWATERING
· SELECTIVE COPPER REMOVAL
· TOC REDUCTION
· Dl TO 18 MEGOHM

MANCHESTER'S WASTEWATER TREAT-MENT SYSTEMS offer the highest quality available. Our systems are designed to meet difficult discharge requirements in the most cost-effective manner. The systems will meet discharge limits without the use of mechanical filtration. Sludge can be processed by conventional filter presses or by automated centrifuges to produce a dewatered mass meeting TCLP requirements for landfill disposal.

MANCHESTER'S RECYCLING SYSTEMS
begin with ultrafiltration, followed by ion exchange for heavy metal as well as ammonia removal for return back to process. Sludge can be processed by filter press or completely automated.

MANCHESTER'S CONTROL SYSTEMS
offer automated PLC-driven computer interfaces. Maintenance and trouble-shooting programs are continually active, alerting the operator to system anomalies. Remote programming and graphic servicing accomplished by modem.