Project Challenge: Effluent Compliance for a Northern Ontario Mine

A major mining operation in Northern Ontario faced stringent new provincial regulations for heavy metal discharge in their process water effluent. Their existing settling ponds were insufficient to meet the required limits for arsenic and lead, risking operational shutdowns and significant environmental penalties. The challenge was to implement a robust, high-capacity filtration system capable of handling abrasive slurry and fluctuating pH levels in a remote, harsh climate.

Our Engineered Solution

NettyMarie designed and deployed a custom multi-stage membrane filtration unit, the NM-9000 Industrial Series. The solution centered on a primary ceramic membrane pre-filter to remove coarse particulates, followed by a proprietary nanofiltration spiral-wound membrane stack for heavy metal ion rejection. The system was housed in a thermally insulated, skid-mounted enclosure for easy transport and installation on-site.

• Ceramic Pre-Filtration: Handles high-solids, abrasive feed with minimal wear.
• Nanofiltration Core: Achieves >99.5% rejection of target heavy metals (As, Pb).
• Automated CIP (Clean-in-Place): Ensures consistent performance with minimal downtime.
• Remote Monitoring: IoT-enabled sensors for real-time pressure, flow, and water quality data.

Implementation & Process

The project was executed in three phases over eight months. Phase one involved a detailed site audit and pilot testing with a mobile filtration trailer. Phase two encompassed the fabrication and factory acceptance testing of the main unit. The final phase was the on-site installation, commissioning, and operator training during the winter season, requiring specialized logistics and cold-weather engineering for fluid lines and controls.

Key process hurdles included integrating the new system with the mine's existing water circuit and calibrating the automated backwash cycles to handle the specific slurry density without membrane fouling.

Measurable Results & Impact

The NM-9000 system has been operational for 18 months, delivering exceptional results. The client consistently reports effluent quality well below the provincial discharge limits, with arsenic levels reduced by 99.7% and lead by 99.8%. The automated system reduced manual labor requirements by 60% compared to the old pond management.

• 99.7% reduction in Arsenic discharge.
• 99.8% reduction in Lead discharge.
• 60% reduction in operational labor costs.
• 100% compliance with Ontario Regulation 560/94.
• System uptime of 98.5% since commissioning.